https://chessbook.com/_build/assets/inner_app-BWThwd46.js

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2d character`,kings:`each side must have exactly one king`},ip=class e{board=new Uint8Array(128);us=0;castling=0;ep=uf;halfMoves=0;moveNumber=1;kings=[uf,uf];hist=[];legalCache=null;pinDir=new Int8Array(128);_version=0;constructor(e=$d){let t=this.setup(e);if(t)throw Error(`Invalid FEN "${e}": ${t}`)}get version(){return this._version}static validateFen(t){let n=new e().setup(t);return{valid:!n,error:n??``}}clone(){let t=Object.create(e.prototype);return t.board=this.board.slice(),t.pinDir=new Int8Array(128),t.us=this.us,t.castling=this.castling,t.ep=this.ep,t.halfMoves=this.halfMoves,t.moveNumber=this.moveNumber,t.kings=[this.kings[0],this.kings[1]],t.hist=this.hist.slice(),t.legalCache=this.legalCache,t._version=this._version,t}turn(){return this.us===0?`w`:`b`}get(e){let t=Ff[e];if(t===void 0)return null;let n=this.board[t];return n===ef?null:Wf[n]}fen(){return`${this.placement()} ${this.turn()} ${this.castlingString()} ${this.ep===uf?`-`:If[this.ep]} ${this.halfMoves} ${this.moveNumber}`}epd(){return`${this.placement()} ${this.turn()} ${this.castlingString()} ${this.legalEpString(this.legalMoves())}`}inCheck(){let e=this.kings[this.us];return e!==uf&&this.attacked(e,this.us^1)}inCheckmate(){return this.inCheck()&&this.legalMoves().length===0}inStalemate(){return!this.inCheck()&&this.legalMoves().length===0}insufficientMaterial(){let e=0,t=0,n=0;for(let r=Rf;r<=Vf;r++){if(r&136){r+=7;continue}let i=this.board[r]&cf;if(i!==ef){if(e++,i===tf||i===af||i===of)return!1;i===nf&&n++,i===rf&&(t|=1<<((r>>4)+(r&7)&1))}}return e===2||e===3&&(n===1||t!==0)||n===0&&t!==3}inThreefoldRepetition(){let e=new Map,t=this.repetitionKey();e.set(t,1);let n=0,r=!1;for(let i=this.hist.length-1;i>=0;i--){let a=this.hist[i];if(Jf(a.move)&26||Zf(a.move)===tf)break;this.revert(a.move,a.undo),n++;let o=this.repetitionKey(),s=(e.get(o)??0)+1;if(e.set(o,s),o===t&&s>=3){r=!0;break}}for(let e=this.hist.length-n;e<this.hist.length;e++)this.apply(this.hist[e].move);return r}inDraw(){return this.halfMoves>=100||this.inStalemate()||this.insufficientMaterial()||this.inThreefoldRepetition()}gameOver(){return this.inCheckmate()||this.inDraw()}attackers(e){let t=Ff[e],n=[];if(t===void 0)return n;let r=this.board;for(let e of Df){let i=t+e;!(i&136)&&(r[i]&cf)===nf&&n.push(If[i])}for(let e of Af){let i=t+e;!(i&136)&&(r[i]&cf)===sf&&n.push(If[i])}for(let e of[15,17]){let i=t+e;!(i&136)&&r[i]===tf&&n.push(If[i])}for(let e of[-15,-17]){let i=t+e;!(i&136)&&r[i]===9&&n.push(If[i])}for(let e of kf)for(let i=t+e;!(i&136);i+=e){let e=r[i]&cf;if(e!==ef){(e===af||e===of)&&n.push(If[i]);break}}for(let e of Of)for(let i=t+e;!(i&136);i+=e){let e=r[i]&cf;if(e!==ef){(e===rf||e===of)&&n.push(If[i]);break}}return n}moves(e={}){let t=this.legalMoves(),n=e.square===void 0?uf:Ff[e.square]??-2,r=e.verbose===!0,i=[];for(let e of t){if(n!==uf&&Kf(e)!==n)continue;let a=this.sanOf(e,t);i.push(r?this.toMove(e,a):a)}return i}

2move(e,t={}){let n=this.legalMoves(),r=typeof e==`string`?this.findSan(e,n,t.sloppy===!0):this.findPartial(e,n);if(r===null)return null;let i=this.sanOf(r,n);return this.make(r,i),this.toMove(r,i)}validateMoves(e,t={}){let n=[],r=this._version,i=this.legalCache,a=0,o=!0;for(let r of e){let e=this.move(r,t);if(!e){o=!1;break}n.push(e),a++}for(let e=0;e<a;e++)this.undo();return this._version=r,this.legalCache=i,o?n:null}undo(){let e=this.hist.pop();return e?(this.revert(e.move,e.undo),this.legalCache=null,this._version++,this.toMove(e.move,e.san)):null}history(e={}){return e.verbose?this.hist.map(e=>this.toMove(e.move,e.san)):this.hist.map(e=>e.san)}perft(e){if(e===0)return 1;let t=this.generateLegal();if(e===1)return t.length;let n=0;for(let r of t){let t=this.apply(r);n+=this.perft(e-1),this.revert(r,t)}return n}setup(e){let t=e.trim().split(/\s+/);if(t.length<4||t.length>6)return rp.fields;let[n,r,i,a,o=`0`,s=`1`]=t;if(!/^\d+$/.test(o))return rp.halfMove;if(!/^\d+$/.test(s)||Number(s)===0)return rp.fullMove;if(a!==`-`&&!/^[a-h][36]$/.test(a))return rp.enPassant;if(!/^(-|K?Q?k?q?)$/.test(i)||i===``)return rp.castling;if(r!==`w`&&r!==`b`)return rp.turn;let c=n.split(`/`);if(c.length!==8)return rp.ranks;let l=new Uint8Array(128),u=[uf,uf],d=0,f=0;for(let e=0;e<8;e++){let t=0;for(let n of c[e]){if(n>=`1`&&n<=`8`){t+=Number(n);continue}let r=pf.indexOf(n);if(r<=0||(r&cf)===0||(r&cf)===7)return rp.piece;if(t>=8)return rp.rankLength;let i=e<<4|t;l[i]=r,(r&cf)===sf&&(r&lf?(f++,u[1]=i):(d++,u[0]=i)),t++}if(t!==8)return rp.rankLength}if(d!==1||f!==1)return rp.kings;let p=0;if(i.includes(`K`)&&l[Hf]===sf&&l[Vf]===af&&(p|=mf),i.includes(`Q`)&&l[Hf]===sf&&l[Bf]===af&&(p|=hf),i.includes(`k`)&&l[Uf]===14&&l[zf]===12&&(p|=gf),i.includes(`q`)&&l[Uf]===14&&l[Rf]===12&&(p|=_f),this.board=l,this.kings=u,this.us=r===`w`?0:1,this.castling=p,this.ep=a===`-`?uf:Ff[a],this.ep!==uf){let e=this.ep-Mf[this.us],t=tf|(this.us===0?lf:0);(this.board[e]!==t||this.board[this.ep]!==ef)&&(this.ep=uf)}return this.halfMoves=Number(o),this.moveNumber=Number(s),this.hist=[],this.legalCache=null,this._version++,null}placement(){let e=``;for(let t=0;t<8;t++){let n=0;for(let r=0;r<8;r++){let i=this.board[t<<4|r];if(i===ef){n++;continue}n&&=(e+=n,0),e+=pf[i]}n&&(e+=n),t<7&&(e+=`/`)}return e}castlingString(){if(this.castling===0)return`-`;let e=``;return this.castling&mf&&(e+=`K`),this.castling&hf&&(e+=`Q`),this.castling&gf&&(e+=`k`),this.castling&_f&&(e+=`q`),e}legalEpString(e){if(this.ep===uf)return`-`;for(let t of e)if(Jf(t)&xf)return If[this.ep];return`-`}repetitionKey(){let e=this.ep===uf?`-`:this.legalEpString(this.generateLegal());return`${this.placement()} ${this.us} ${this.castling} ${e}`}toMove(e,t){let n=Jf(e),r=Xf(e),i=Yf(e);return{color:Qf(e)===0?`w`:`b`,from:If[Kf(e)],to:If[qf(e)],piece:df[Zf(e)],san:t,flags:Ef[n],captured:r?df[r]:void 0,promotion:i?df[i]:void 0}}disambiguator(e,t){let n=Kf(e),r=qf(e),i=Zf(e),a=0,o=0,s=0;for(let c of t){let t=Kf(c);t!==n&&qf(c)===r&&Zf(c)===i&&Yf(c)===Yf(e)&&(a++,t>>4==n>>4&&o++,(t&7)==(n&7)&&s++)}return a===0?``:o>0&&s>0?If[n]:s>0?If[n][1]:If[n][0]}sanOf(e,t){let n=Jf(e),r;if(n&Cf)r=`O-O`;else if(n&wf)r=`O-O-O`;else{let i=Zf(e);r=``,i!==tf&&(r+=df[i].toUpperCase()+this.disambiguator(e,t)),n&10&&(i===tf&&(r+=If[Kf(e)][0]),r+=`x`),r+=If[qf(e)],n&Sf&&(r+=`=${df[Yf(e)].toUpperCase()}`)}let i=this.apply(e),a=this.kings[this.us];return a!==uf&&this.attacked(a,this.us^1)&&(r+=this.generateLegal().length===0?`#`:`+`),this.revert(e,i),r}findPartial(e,t){let n=Ff[e.from],r=Ff[e.to];if(n===void 0||r===void 0)return null;let i=e.promotion?ff[e.promotion]:0,a=null;for(let e of t){if(Kf(e)!==n||qf(e)!==r)continue;let t=Yf(e);if(t===i)return e;!i&&t===of&&(a=e)}return a}findSan(e,t,n){let r=np(e,n);if(!r)return null;let i=null,a=null;for(let e of t){let o=Jf(e);if(r.castle){if(!(o&r.castle))continue;return e}if(qf(e)!==r.to)continue;let s=Kf(e),c=Zf(e);if(o&96){if(n&&(s&7)===r.fromFile&&s>>4===r.fromRank&&(r.piece===0||r.piece===sf))return e;continue}if(r.piece){if(c!==r.piece)continue}else if(c!==tf&&(!n||r.fromFile<0||r.fromRank<0))continue;if(r.fromFile>=0&&(s&7)!==r.fromFile||r.fromRank>=0&&s>>4!==r.fromRank)continue;let l=!!(o&10),u=Yf(e);if(o&Sf){if(r.promotion===0){if(!n)continue;u===of&&(a=e);continue}if(u!==r.promotion)continue}else if(r.promotion!==0)continue;if(n||l===r.capture&&(r.fromFile>=0?If[s][0]:``)+(r.fromRank>=0?If[s][1]:``)===(c===tf?l?If[s][0]:``:this.disambiguator(e,t))){if(i!==null)return null;i=e}}return i??a}make(e,t){let n=this.apply(e);this.hist.push({move:e,undo:n,san:t}),this.legalCache=null,this._version++}apply(e){let t=this.board,n=Kf(e),r=qf(e),i=Jf(e),a=Zf(e),o=this.us,s=o<<3,c=this.castling|this.ep+1<<4|this.halfMoves<<12;return t[r]=i&Sf?Yf(e)|s:t[n],t[n]=ef,i&xf?t[r-Mf[o]]=ef:i&Cf?(t[r-1]=t[r+1],t[r+1]=ef):i&wf&&(t[r+1]=t[r-2],t[r-2]=ef),a===sf&&(this.kings[o]=r,this.castling&=o===0?-4:-13),this.castling&=~(Lf[n]|Lf[r]),this.ep=i&bf?n+r>>1:uf,this.halfMoves=a===tf||i&10?0:this.halfMoves+1,o===1&&this.moveNumber++,this.us=o^1,c}revert(e,t){let n=this.board,r=Kf(e),i=qf(e),a=Jf(e),o=Zf(e),s=this.us^1,c=s<<3,l=c^lf;this.us=s,s===1&&this.moveNumber--,this.castling=t&15,this.ep=(t>>4&255)-1,this.halfMoves=t>>

212,n[r]=o|c,n[i]=a&yf?Xf(e)|l:ef,a&xf?n[i-Mf[s]]=tf|l:a&Cf?(n[i+1]=n[i-1],n[i-1]=ef):a&wf&&(n[i-2]=n[i+1],n[i+1]=ef),o===sf&&(this.kings[s]=r)}attacked(e,t){let n=this.board,r=t<<3;for(let t=0;t<8;t++){let i=e+Df[t];if(!(i&136)&&n[i]===(nf|r))return!0}for(let t=0;t<8;t++){let i=e+Af[t];if(!(i&136)&&n[i]===(sf|r))return!0}let i=e-Mf[t],a=tf|r;if(!(i-1&136)&&n[i-1]===a||!(i+1&136)&&n[i+1]===a)return!0;let o=af|r,s=of|r;for(let t=0;t<4;t++){let r=kf[t];for(let t=e+r;!(t&136);t+=r){let e=n[t];if(e!==ef){if(e===o||e===s)return!0;break}}}let c=rf|r;for(let t=0;t<4;t++){let r=Of[t];for(let t=e+r;!(t&136);t+=r){let e=n[t];if(e!==ef){if(e===c||e===s)return!0;break}}}return!1}legalMoves(){return this.legalCache===null&&(this.legalCache=this.generateLegal()),this.legalCache}markPins(e,t,n){let r=this.board,i=(t^1)<<3;for(let t=0;t<8;t++){let a=Af[t],o=e+a,s=uf;for(;!(o&136);o+=a){let e=r[o];if(e!==ef){if(s===uf){if((e&lf)===i)break;s=o;continue}if((e&lf)===i){let t=e&cf,r=a===15||a===17||a===-15||a===-17;(t===of||r&&t===rf||!r&&t===af)&&(this.pinDir[s]=a,n.push(s))}break}}}}legalSlow(e,t,n,r,i){let a=this.board,o=a[e],s=a[t];a[t]=o,a[e]=ef;let c=uf,l=ef;n&xf&&(c=t-Mf[r],l=a[c],a[c]=ef);let u=(o&cf)===sf?t:i,d=!this.attacked(u,r^1);return a[e]=o,a[t]=s,c!==uf&&(a[c]=l),d}generateLegal(){let e=[],t=this.board,n=this.us,r=n^1,i=n<<3,a=r<<3,o=this.kings[n],s=o!==uf&&this.attacked(o,r),c=[];o!==uf&&this.markPins(o,n,c);let l=this.pinDir,u=(e,t,r)=>{if(o===uf)return!0;if(s||r&xf)return this.legalSlow(e,t,r,n,o);let i=l[e];return i===0||Pf[t-o+119]===i},d=(t,r,i,a,o)=>{if(a===tf&&(!(r>>4)||r>>4==7)){if(!u(t,r,i))return;for(let s of Nf)e.push(Gf(t,r,i|Sf,a,o,s,n));return}u(t,r,i)&&e.push(Gf(t,r,i,a,o,0,n))},f=Mf[n],p=n===0?6:1;for(let o=Rf;o<=Vf;o++){if(o&136){o+=7;continue}let c=t[o];if(c===ef||(c&lf)!==i)continue;let l=c&cf;if(l===tf){let e=o+f;if(t[e]===ef){d(o,e,vf,tf,ef);let n=e+f;o>>4===p&&t[n]===ef&&d(o,n,bf,tf,ef)}for(let n=-1;n<=1;n+=2){let r=e+n;if(r&136)continue;let i=t[r];i!==ef&&(i&lf)===a?d(o,r,yf,tf,i&cf):r===this.ep&&d(o,r,xf,tf,tf)}continue}if(l===sf){for(let a=0;a<8;a++){let s=o+Af[a];if(s&136)continue;let l=t[s];if(l!==ef&&(l&lf)===i)continue;t[o]=ef;let u=!this.attacked(s,r);t[o]=c,u&&e.push(Gf(o,s,l===ef?vf:yf,sf,l&cf,0,n))}if(!s){let i=n===0?mf:gf,a=n===0?hf:_f;this.castling&i&&t[o+1]===ef&&t[o+2]===ef&&!this.attacked(o+1,r)&&!this.attacked(o+2,r)&&e.push(Gf(o,o+2,Cf,sf,ef,0,n)),this.castling&a&&t[o-1]===ef&&t[o-2]===ef&&t[o-3]===ef&&!this.attacked(o-1,r)&&!this.attacked(o-2,r)&&e.push(Gf(o,o-2,wf,sf,ef,0,n))}continue}let u=jf[l],m=l!==nf;for(let e=0;e<u.length;e++){let n=u[e];for(let e=o+n;!(e&136);e+=n){let n=t[e];if(n===ef)d(o,e,vf,l,ef);else{(n&lf)===a&&d(o,e,yf,l,n&cf);break}if(!m)break}}}for(let e of c)l[e]=0;return e}},ap=[`a`,`b`,`c`,`d`,`e`,`f`,`g`,`h`],op=[1,2,3,4,5,6,7,8],sp=(e,t)=>{let[n,r]=e.split(``),i=Eu(ap,n),a=7-Eu(op,Number.parseInt(r,10));return t&&(i=7-i,a=7-a),{x:i/8,y:a/8}},cp=e=>{let t=new ip,n=[fp];return Kl(e,e=>{t.move(e,{sloppy:!0}),n.push(dp(t))}),n},lp=e=>e.split(` `)[1]===`w`?`white`:`black`,up=(e,t)=>{t.move(e);let n=t.inCheckmate();return t.undo(),n};function dp(e){return e.epd()}var fp=`rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -`,pp=e=>e.from+e.to+(e.promotion??``),mp;(function(e){function t(e){let t=e;return typeof e==`string`&&(t=e.split(` `)),t.length%2==1?`white`:`black`}e.sideOfLastMove=t;function n(e){let t=``;return Kl(e,(e,n)=>{let r=n/2+1;t=n%2==1?`${t} ${e}`:`${t} ${r}.${e}`}),t.trim()}e.toPgn=n;function r(e,t,n){if(n%2==0){let r=n/2+1;return`${e?`${e} `:``}${r}.${t}`}return`${e} ${t}`}e.appendPgnMove=r;function i(e){return e.replaceAll(/\d+\./g,``).split(` `).filter(e=>e!==``)}e.fromPgn=i;function a(e){return Math.floor(e.length/2+1)}e.getMoveNumber=a;let o=new Map;function s(e){if(o.has(e))return o.get(e);let t=new ip,n=[],r=mp.fromPgn(e);for(let e of r)t.move(e),n.push(dp(t));return o.set(e,n),n}e.toPositions=s})(mp||={});var hp=`useandom-26T198340PX75pxJACKVERYMINDBUSHWOLF_GQZbfghjklqvwyzrict`,gp=(e=21)=>{let t=``,n=crypto.getRandomValues(new Uint8Array(e|=0));for(;e--;)t+=hp[n[e]&63];return t};function _p(e,t){return function(){return e.apply(t,arguments)}}var{toString:vp}=Object.prototype,{getPrototypeOf:yp}=Object,{iterator:bp,toStringTag:xp}=Symbol,Sp=(({hasOwnProperty:e})=>(t,n)=>e.call(t,n))(Object.prototype),Cp=(e,t)=>{let n=e,r=[];for(;n!=null&&n!==Object.prototype;){if(r.indexOf(n)!==-1)return!1;if(r.push(n),Sp(n,t))return!0;n=yp(n)}return!1},wp=(e,t)=>

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23{iO.size>=aO&&iO.delete(iO.keys().next().value),iO.set(e,t)},lO=45e3,uO=8e3,dO=1e4,fO=18e4,pO=2e4,mO=50,hO=64,gO=10,_O=1e8,vO=500,yO=e=>Math.min(fO,dO+Math.ceil(e/pO)*1e3),bO=class extends Error{name=`StockfishUnavailableError`},xO=class extends Error{name=`StockfishQueueOverflowError`},SO=class extends Error{name=`StockfishStoppedEarlyError`},CO=class extends Error{name=`StockfishWatchdogError`},wO=e=>{ky({category:`stockfish`,level:`debug`,message:e.slice(0,vO)})},TO=()=>({flavor:rD(),unavailableReason:nD(),loaded:G.loaded,isReady:G.isReady,running:G.running,isProcessing:G.isProcessing,queueLength:G.taskQueue.length,pendingBarriers:G.pendingBarrierResolvers.length,nodeGoal:G.nodeGoal,epd:G.epd,multiPvSetting:G.multiPvSetting,lastNps:G.lastNps,resurrectionsInWindow:G.resurrectionTimestamps.length,resurrectionsThisSession:G.resurrectionCount,online:typeof navigator>`u`?null:navigator.onLine,visibility:typeof document>`u`?null:document.visibilityState,hardwareConcurrency:typeof navigator>`u`?null:navigator.hardwareConcurrency}),EO=e=>[`stockfish`,e,rD()??`unknown`],DO=(e,t,n)=>{Zt(r=>{r.setContext(`stockfish`,{...TO(),...n}),r.setFingerprint(EO(t)),r.setTag(`stockfish.cause`,t),qn(e)})},OO=(e,t,n)=>{Zt(r=>{r.setContext(`stockfish`,{...TO(),...n}),r.setFingerprint(EO(t)),r.setTag(`stockfish.cause`,t),r.setLevel(`warning`),er(e)})},kO=e=>{if(!Number.isInteger(e)||e<1||e>_O)throw Error(`Invalid Stockfish node count: ${e}`)},AO=e=>{if(!Number.isInteger(e)||e<1||e>gO)throw Error(`Invalid Stockfish MultiPV value: ${e}`)},jO=e=>{let t={};for(let n of e)/[a-zA-Z]/.test(n)&&(t[n]=(t[n]??0)+1);return t},MO=e=>{let t=e.split(`/`);if(t.length!==8)throw Error(`Invalid EPD: piece placement must contain 8 ranks`);for(let[e,n]of t.entries()){let t=0,r=!1;for(let i of n)if(/^[1-8]$/.test(i)){if(r)throw Error(`Invalid EPD: piece placement contains adjacent digits`);t+=Number.parseInt(i,10),r=!0}else if(/^[prnbqkPRNBQK]$/.test(i)){if(t+=1,r=!1,(i===`p`||i===`P`)&&(e===0||e===7))throw Error(`Invalid EPD: pawns cannot be on the first or eighth rank`)}else throw Error(`Invalid EPD: unexpected piece placement character '${i}'`);if(t!==8)throw Error(`Invalid EPD: each rank must contain exactly 8 files`)}let n=jO(e);if(n.K!==1||n.k!==1)throw Error(`Invalid EPD: position must contain exactly one king for each side`)},NO=e=>{if(e!==`-`&&!/^(?!.*(.).*\1)[KQkq]+$/.test(e))throw Error(`Invalid EPD: castling rights must be '-', or a unique subset of KQkq`)},PO=e=>{if(e!==`-`&&!/^[a-h][36]$/.test(e))throw Error(`Invalid EPD: en passant square must be '-' or a square on rank 3 or 6`)},FO=e=>{if(e.moves().length>0)return null;let t=new OE(`0`);return e.inCheckmate()&&(t.eval=void 0,t.mate=[0,oC.flip(oC.fromColor(e.turn()))]),t},IO=e=>{let t=e.split(/\s+/);if(t[1]=t[1]===`w`?`b`:`w`,t[3]=`-`,new ip(t.join(` `)).inCheck())throw Error(`Invalid EPD: side not to move is in check`)},LO=e=>{let t=e.trim().split(/\s+/);if(t.length!==4)throw Error(`Invalid EPD: expected piece placement, side, castling, and en passant fields`);let[n,r,i,a]=t;if(MO(n),r!==`w`&&r!==`b`)throw Error(`Invalid EPD: side to move must be 'w' or 'b'`);NO(i),PO(a);let o=t.join(` `),s=EE.toFen(o),c=ip.validateFen(s);if(!c.valid)throw Error(`Invalid EPD: ${c.error}`);let l=new ip(s);return IO(s),{epd:o,fen:s,position:l,terminalEval:FO(l),terminalMoves:[]}},RO=(e,t)=>{if(!e.startsWith(`info `))return null;let n=e.trim().split(/\s+/),r=n.indexOf(`multipv`),i=n.indexOf(`score`),a=n.indexOf(`nodes`),o=n.indexOf(`pv`);if(i===-1||a===-1||o===-1)return null;let s=n[i+1],c=Number.parseInt(n[i+2],10),l=Number.parseInt(n[a+1],10),u=n[o+1];if(s!==`cp`&&s!==`mate`||!Number.isFinite(c)||!Number.isFinite(l)||!u)return null;let d=r===-1?1:Number.parseInt(n[r+1]??``,10);if(!Number.isInteger(d)||d<1)return null;let f=t===`b`?-c:c,p=new OE(`0`);return p.thinking=!0,s===`cp`?p.eval=f:(p.eval=void 0,p.mate=[Math.abs(f),f===0?oC.flip(oC.fromColor(t)):f<0?`black`:`white`]),p.pv=u,{stockfishEval:p,nodes:l,multipv:d,pvLan:u,pv:u}},zO=class{timeoutId=null;lastTimeoutStart;failCallback;probeCallback;probeOutstanding=!1;constructor(e,t){this.failCallback=e,this.probeCallback=t,this.lastTimeoutStart=performance.now(),this.arm()}arm(){this.timeoutId=setTimeout(()=>{this.onSilence()},uO),this.lastTimeoutStart=performance.now()}delayFail(){this.timeoutId&&clearTimeout(this.timeoutId),this.probeOutstanding=!1,this.arm()}destroy(){this.timeoutId&&clearTimeout(this.timeoutId)}onSilence(){if(this.timeoutId&&clearTimeout(this.timeoutId),this.timeoutId=null,!this.probeOutstanding){this.probeOutstanding=!0,this.probeCallback(),this.arm();return}this.failCallback()}},BO=5,VO=6e5,G={position:new ip,loaded:!1,nodeGoal:YD.STANDARD,isReady:!1,running:!1,readyCallback:new AE,loadedCallback:new AE,evalUpdatedCallback:new AE,topMovesUpdatedCallback:new AE,topMovesFinalCallback:new AE,finalEvalCallback:new AE,okCallback:new AE,taskQueue:[],isProcessing:!1,inlineTaskDepth:0,failureDetector:null,abortActiveTask:null,resurrectionTimestamps:[],resurrectionCount:0,illegalPvCount:0,reportedDead:!1,reloadPromise:null,resolveReloadPromise:null,idleCallback:new AE,pendingBarrierResolvers:[],lastNps:null,legalMoves:{}

23,uciCmd:e=>{QD(e)},getOption:e=>G.uciCmd(`option name ${e} value`),isResurrectionBudgetExhausted:()=>{let e=Date.now();return G.resurrectionTimestamps=G.resurrectionTimestamps.filter(t=>e-t<VO),G.resurrectionTimestamps.length>=BO},assertAvailable:()=>{if(!GE())throw new bO(`Stockfish is unavailable: disabled-by-admin`);let e=nD();if(e)throw new bO(`Stockfish is unavailable: ${e}`);if(G.isResurrectionBudgetExhausted())throw new bO(`Stockfish is unavailable: engine repeatedly crashed, cooling down`)},ensureLoaded:async()=>{if(G.loaded&&G.isReady)return;G.assertAvailable(),$D();let e=performance.now(),t=()=>{if(G.loaded&&G.isReady)return;let t=Error(`Stockfish failed to load`),n=typeof navigator<`u`&&navigator.onLine===!1,r=typeof document<`u`&&document.visibilityState===`hidden`;throw n||r?wO(`load timeout suppressed (${n?`offline`:`hidden`}) after ${Math.round(performance.now()-e)}ms`):DO(t,`load-timeout`,{elapsedMs:performance.now()-e}),t};for(;!G.loaded;)G.assertAvailable(),performance.now()-e>lO&&t(),await new Promise(e=>setTimeout(e,mO));if(!G.isReady){let n=Math.max(0,lO-(performance.now()-e));await Promise.race([G.checkReady(),new Promise((e,r)=>{setTimeout(()=>{try{t(),e()}catch(e){r(e)}},n)})])}},setOption:(e,t)=>{G.uciCmd(`setoption name ${e} value ${t}`)},setMemory:e=>{G.setOption(`Hash`,`${Math.max(1,Math.floor(e))}`)},setThreads:e=>{G.setOption(`Threads`,`${Math.max(1,Math.floor(e))}`)},multiPvSetting:1,setMultiPv:e=>{AO(e),G.setOption(`MultiPV`,`${e}`),G.multiPvSetting=e},activeTopMovesRequest:null,getCachedTopMoves:(e,{pv:t,nodes:n})=>iO.get(sO(e,t,n))??null,getTopMoves:(e,{pv:t,nodes:n,source:r},i)=>{AO(t),kO(n);let a=LO(e);if(a.terminalEval)return Promise.resolve({evaluation:a.terminalEval,moves:a.terminalMoves});let o=sO(e,t,n),s=iO.get(o);if(s)return Promise.resolve(s);let c=oO.get(o);if(c)return c;let l=G.enqueueTask(async()=>{G.setMultiPv(t),i&&G.topMovesUpdatedCallback.add(i);let s=new Promise(e=>{G.topMovesFinalCallback.add(t=>{e(t)})}),c=new Promise(e=>{G.finalEvalCallback.add(t=>{e(t)})});G.activeTopMovesRequest={epd:e,key:o,source:r},G.startAnalysis(a,n);let[l,u]=await Promise.all([c,s]);return(G.lastInfo?.nodes??0)>=n*.9&&cO(o,{evaluation:l,moves:u}),{evaluation:l,moves:u}},{nodes:n});return oO.set(o,l),l.catch(()=>{}).finally(()=>{oO.delete(o)}),l},stopAnalysisFrom:e=>{G.running&&G.activeTopMovesRequest?.source===e&&G.uciCmd(`stop`)},checkReady:()=>G.loaded&&G.isReady?Promise.resolve(!0):new Promise(e=>{G.readyCallback.add(()=>{e(!0)}),G.uciCmd(`isready`)}),setPosition:e=>{G.uciCmd(`position fen ${LO(e).fen}`)},epd:null,startAnalysis:(e,t)=>{kO(t),G.running=!0;let n=new Promise(e=>{G.finalEvalCallback.add(t=>{G.running=!1,e(t)})}),r=e.position.moves({verbose:!0});return G.legalMoves={},r.forEach(e=>{G.legalMoves[pp(e)]=e.san}),G.position=e.position,G.epd=e.epd,G.uciCmd(`position fen ${e.fen}`),G.uciCmd(`go nodes ${t}`),G.nodeGoal=t,n},go:async(e,t)=>{let n=t.nodes??YD.STANDARD;kO(n);let r=LO(e);return r.terminalEval?Promise.resolve(r.terminalEval):G.enqueueTask(()=>G.startAnalysis(r,n),{nodes:n})},evalPos:async({epd:e,nodes:t,cb:n})=>{let r=t??YD.STANDARD;kO(r);let i=LO(e);return i.terminalEval?Promise.resolve(i.terminalEval):G.enqueueTask(async()=>{if(!G.loaded)return null;let e=nO(i.epd,r);return eO.get(e)||(G.setMultiPv(1),n&&G.evalUpdatedCallback.add(n),await G.startAnalysis(i,r).then(t=>(rO(e,t),t)))},{nodes:r})},ready:()=>{G.isReady=!0,G.reportedDead=!1,G.resolveReloadPromise?.(),G.reloadPromise=null,G.resolveReloadPromise=null,G.readyCallback.callAndClear(),G.notifyIdle()},onBestMove:e=>{if(G.lastInfo){G.onInfo(G.lastInfo,!0);return}G.abortActiveTask?.(new SO(`Search stopped before any engine output`))},onReady:()=>G.loaded&&G.isReady?Promise.resolve():new Promise(e=>{G.readyCallback.add(()=>{e()})}),lastInfo:null,pendingMoves:[],setupForNewTask:e=>{(e?.sendCommands??!0)&&(G.uciCmd(`stop`),G.setMultiPv(1)),G.finalEvalCallback.clear(),G.evalUpdatedCallback.clear(),G.topMovesFinalCallback.clear(),G.topMovesUpdatedCallback.clear(),G.failureDetector?.destroy(),G.failureDetector=null,G.pendingMoves=[],G.lastInfo=null,G.running=!1,G.epd=null,G.activeTopMovesRequest=null},syncEngine:()=>new Promise(e=>{G.pendingBarrierResolvers.push(e),G.uciCmd(`isready`)}),handleUciMessage:e=>{let t=String(e);

23if(wO(t),G.failureDetector?.delayFail(),t===`uciok`){G.loaded=!0;let e=G.pendingBarrierResolvers;G.pendingBarrierResolvers=[],e.forEach(e=>e()),G.loadedCallback.call(),G.uciCmd(`isready`);return}if(t===`readyok`){G.isReady=!0;let e=G.pendingBarrierResolvers.shift();if(e){e();return}G.ready();return}if(G.pendingBarrierResolvers.length>0)return;let n=t.match(/^info .*\bnps (\d+)/);n&&(G.lastNps=Number.parseInt(n[1],10));let r=t.match(/^bestmove ([a-h][1-8][a-h][1-8][qrbn]?|\(none\))/);r&&(G.running=!1,G.onBestMove(r[1]));let i=RO(t,G.position?.turn()||`w`);i&&G.onInfo(i)},onInfo:(e,t=!1)=>{let{stockfishEval:n,multipv:r,pvLan:i}=e;if(t&&(n.thinking=!1),r===1&&(G.lastInfo=e),G.evalUpdatedCallback.call(n),t&&G.finalEvalCallback.call(n),t){G.pendingMoves=G.pendingMoves.map(e=>(e.stockfishEval.thinking=!1,{...e,final:!0})),G.topMovesUpdatedCallback.call(G.pendingMoves),G.topMovesFinalCallback.call(G.pendingMoves);return}if(!G.running||!G.epd)return;let a=G.legalMoves[i];if(!a){G.illegalPvCount+=1,wO(`illegal pv dropped: ${i} (multipv ${r})`),G.illegalPvCount===1&&DO(Error(`Stockfish returned a PV that was not legal in the current position`),`illegal-pv`,{pvLan:i,multipv:r,pv:e.pv?.slice(0,400)});return}let o={stockfishEval:n,san:a,multipv:r};r===1&&(G.pendingMoves=[]);let s=G.pendingMoves.findIndex(e=>e.multipv===r);s===-1?G.pendingMoves.push(o):G.pendingMoves[s]=o,G.pendingMoves.sort((e,t)=>e.multipv-t.multipv),G.topMovesUpdatedCallback.call(G.pendingMoves)},async enqueueTask(e,t){if(G.loaded||await G.ensureLoaded(),G.inlineTaskDepth>0)return e();let n=yO(t?.nodes??YD.STANDARD);return new Promise((t,r)=>{let i=async a=>{let o=null,s=!1,c=null,l=e=>(o||(o=new CO(e),wO(`watchdog: ${e} (attempt ${a+1})`),G.reloadStockfish(e)),o);try{await G.ensureLoaded(),G.setupForNewTask(),s=!0;let r=new Promise((e,t)=>{G.failureDetector=new zO(()=>{t(l(`Stockfish failed to respond`))},()=>{wO(`watchdog: engine quiet, probing with isready`),G.uciCmd(`isready`)})}),i=new Promise((e,t)=>{c=setTimeout(()=>{t(l(`Stockfish failed to return a final result`))},n)}),a=new Promise((e,t)=>{G.abortActiveTask=t});r.catch(()=>{}),i.catch(()=>{}),a.catch(()=>{}),await Promise.race([G.syncEngine(),r,i]);let o=(()=>{G.inlineTaskDepth+=1;try{return e()}finally{--G.inlineTaskDepth}})();t(await Promise.race([o,r,i,a]))}catch(e){e instanceof CO&&a===0?G.taskQueue.unshift({run:()=>i(1),abandon:r}):(e instanceof CO&&DO(e,`watchdog-retry-failed`,{attempt:a+1,resultTimeoutMs:n}),r(e))}finally{c&&clearTimeout(c),G.setupForNewTask({sendCommands:s&&!o}),G.isProcessing=!1,G.failureDetector=null,G.abortActiveTask=null,G.processNextTask(),G.notifyIdle()}},a=()=>i(0);G.isProcessing?(G.taskQueue.unshift({run:a,abandon:r}),G.enforceQueueCap()):(G.isProcessing=!0,a())})},enforceQueueCap:()=>{for(;G.taskQueue.length>hO;){let e=G.taskQueue.pop();wO(`dropped oldest queued task (queue length ${G.taskQueue.length+1})`),G.reportedQueueOverflow||(G.reportedQueueOverflow=!0,OO(`Stockfish task queue overflowed, dropping oldest tasks`,`queue-overflow`)),e.abandon(new xO(`Stockfish task dropped: too many queued requests`))}},reportedQueueOverflow:!1,processNextTask:()=>{if(G.taskQueue.length>0&&!G.isProcessing){let e=G.taskQueue.shift();G.isProcessing=!0,e.run()}},isStockfishIdle:()=>G.loaded&&G.isReady&&!G.running&&!G.isProcessing&&G.taskQueue.length===0,onStockfishIdle:e=>{G.isStockfishIdle()?queueMicrotask(e):G.idleCallback.add(e)},notifyIdle:()=>{G.isStockfishIdle()&&G.idleCallback.callAndClear()},beginReload:()=>(G.reloadPromise||=new Promise(e=>{G.resolveReloadPromise=e}),G.loaded=!1,G.isReady=!1,G.reloadPromise),reloadStockfish:(e=`unknown`)=>{if(G.isResurrectionBudgetExhausted()){G.reportedDead||(G.reportedDead=!0,DO(Error(`Guardian angel: Stockfish is dead, giving up`),`dead`,{reason:e}));return}G.resurrectionTimestamps.push(Date.now()),G.resurrectionCount+=1,wO(`guardian angel: resurrecting (${e}), #${G.resurrectionCount} this session`),G.resurrectionCount===1&&OO(`Guardian angel: resurrecting Stockfish: ${e}`,`resurrection`,{reason:e}),G.beginReload(),UD()}},HO=e=>{if(e===GE())return;if(KE(e),e){$D();return}let t=new bO(`Stockfish is unavailable: disabled-by-admin`);

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34=e,{parent:p,context:m,abortEarly:h=a.spec.abortEarly,disableStackTrace:g=a.spec.disableStackTrace}=r,_={value:t,parent:p,context:m};function v(e={}){let r=IP(Object.assign({value:t,originalValue:i,label:a.spec.label,path:e.path||n,spec:a.spec,disableStackTrace:e.disableStackTrace||g},u,e.params),_),o=new xP(xP.formatError(e.message||d,r),t,r.path,e.type||c,r.disableStackTrace);return o.params=r,o}let y=h?o:s,b={path:n,parent:p,type:c,from:r.from,createError:v,resolve(e){return LP(e,_)},options:r,originalValue:i,schema:a},x=e=>{xP.isError(e)?y(e):e?s(null):y(v())},S=e=>{xP.isError(e)?y(e):o(e)};if(f&&PP(t))return x(!0);let C;try{if(C=l.call(b,t,b),typeof C?.then==`function`){if(r.sync)throw Error(`Validation test of type: "${b.type}" returned a Promise during a synchronous validate. This test will finish after the validate call has returned`);return Promise.resolve(C).then(x,S)}}catch(e){S(e);return}x(C)}return t.OPTIONS=e,t}function IP(e,t){if(!e)return e;for(let n of Object.keys(e))e[n]=LP(e[n],t);return e}function LP(e,t){return NP.isRef(e)?e.getValue(t.value,t.parent,t.context):e}function RP(e,t,n,r=n){let i,a,o;return t?((0,iP.forEach)(t,(s,c,l)=>{let u=c?s.slice(1,s.length-1):s;e=e.resolve({context:r,parent:i,value:n});let d=e.type===`tuple`,f=l?parseInt(u,10):0;if(e.innerType||d){if(d&&!l)throw Error(`Yup.reach cannot implicitly index into a tuple type. the path part "${o}" must contain an index to the tuple element, e.g. "${o}[0]"`);if(n&&f>=n.length)throw Error(`Yup.reach cannot resolve an array item at index: ${s}, in the path: ${t}. because there is no value at that index. `);i=n,n&&=n[f],e=d?e.spec.types[f]:e.innerType}if(!l){if(!e.fields||!e.fields[u])throw Error(`The schema does not contain the path: ${t}. (failed at: ${o} which is a type: "${e.type}")`);i=n,n&&=n[u],e=e.fields[u]}a=u,o=c?`[`+s+`]`:`.`+s}),{schema:e,parent:i,parentPath:a}):{parent:i,parentPath:t,schema:e}}var zP=class e extends Set{describe(){let e=[];for(let t of this.values())e.push(NP.isRef(t)?t.describe():t);return e}resolveAll(e){let t=[];for(let n of this.values())t.push(e(n));return t}clone(){return new e(this.values())}merge(e,t){let n=this.clone();return e.forEach(e=>n.add(e)),t.forEach(e=>n.delete(e)),n}};function BP(e,t=new Map){if(AP(e)||!e||typeof e!=`object`)return e;if(t.has(e))return t.get(e);let n;if(e instanceof Date)n=new Date(e.getTime()),t.set(e,n);else if(e instanceof RegExp)n=new RegExp(e),t.set(e,n);else if(Array.isArray(e)){n=Array(e.length),t.set(e,n);for(let r=0;r<e.length;r++)n[r]=BP(e[r],t)}else if(e instanceof Map){n=new Map,t.set(e,n);for(let[r,i]of e.entries())n.set(r,BP(i,t))}else if(e instanceof Set){n=new Set,t.set(e,n);for(let r of e)n.add(BP(r,t))}else if(e instanceof Object){n={},t.set(e,n);for(let[r,i]of Object.entries(e))n[r]=BP(i,t)}else throw Error(`Unable to clone ${e}`);return n}function VP(e){if(!(e!=null&&e.length))return;let t=[],n=``,r=!1,i=!1;for(let a=0;a<e.length;a++){let o=e[a];if(o===`[`&&!i){n&&=(t.push(...n.split(`.`).filter(Boolean)),``),r=!0;continue}if(o===`]`&&!i){n&&=(/^\d+$/.test(n)?t.push(n):t.push(n.replace(/^"|"$/g,``)),``),r=!1;continue}if(o===`"`){i=!i;continue}if(o===`.`&&!r&&!i){n&&=(t.push(n),``);continue}n+=o}return n&&t.push(...n.split(`.`).filter(Boolean)),t}function HP(e,t){let n=t?`${t}.${e.path}`:e.path;return e.errors.map(e=>({message:e,path:VP(n)}))}function UP(e,t){var n;if(!((n=e.inner)!=null&&n.length)&&e.errors.length)return HP(e,t);let r=t?`${t}.${e.path}`:e.path;return e.inner.flatMap(e=>UP(e,r))}var WP=class{constructor(e){this.type=void 0,this.deps=[],this.tests=void 0,this.transforms=void 0,this.conditions=[],this._mutate=void 0,this.internalTests={},this._whitelist=new zP,this._blacklist=new zP,this.exclusiveTests=Object.create(null),this._typeCheck=void 0,this.spec=void 0,this.tests=[],this.transforms=[],this.withMutation(()=>{this.typeError(SP.notType)}),this.type=e.type,this._typeCheck=e.check,this.spec=Object.assign({strip:!1,strict:!1,abortEarly:!0,recursive:!0,disableStackTrace:!1,nullable:!1,optional:!0,coerce:!0},e?.spec),this.withMutation(e=>{e.nonNullable()})}get _type(){return this.type}clone(e){if(this._mutate)return e&&Object.assign(this.spec,e),this;let t=Object.create(Object.getPrototypeOf(this));

34return t.type=this.type,t._typeCheck=this._typeCheck,t._whitelist=this._whitelist.clone(),t._blacklist=this._blacklist.clone(),t.internalTests=Object.assign({},this.internalTests),t.exclusiveTests=Object.assign({},this.exclusiveTests),t.deps=[...this.deps],t.conditions=[...this.conditions],t.tests=[...this.tests],t.transforms=[...this.transforms],t.spec=BP(Object.assign({},this.spec,e)),t}label(e){let t=this.clone();return t.spec.label=e,t}meta(...e){if(e.length===0)return this.spec.meta;let t=this.clone();return t.spec.meta=Object.assign(t.spec.meta||{},e[0]),t}withMutation(e){let t=this._mutate;this._mutate=!0;let n=e(this);return this._mutate=t,n}concat(e){if(!e||e===this)return this;if(e.type!==this.type&&this.type!==`mixed`)throw TypeError(`You cannot \`concat()\` schema's of different types: ${this.type} and ${e.type}`);let t=this,n=e.clone();return n.spec=Object.assign({},t.spec,n.spec),n.internalTests=Object.assign({},t.internalTests,n.internalTests),n._whitelist=t._whitelist.merge(e._whitelist,e._blacklist),n._blacklist=t._blacklist.merge(e._blacklist,e._whitelist),n.tests=t.tests,n.exclusiveTests=t.exclusiveTests,n.withMutation(t=>{e.tests.forEach(e=>{t.test(e.OPTIONS)})}),n.transforms=[...t.transforms,...n.transforms],n}isType(e){return e==null?!!(this.spec.nullable&&e===null||this.spec.optional&&e===void 0):this._typeCheck(e)}resolve(e){let t=this;if(t.conditions.length){let n=t.conditions;t=t.clone(),t.conditions=[],t=n.reduce((t,n)=>n.resolve(t,e),t),t=t.resolve(e)}return t}resolveOptions(e){return Object.assign({},e,{from:e.from||[],strict:e.strict??this.spec.strict,abortEarly:e.abortEarly??this.spec.abortEarly,recursive:e.recursive??this.spec.recursive,disableStackTrace:e.disableStackTrace??this.spec.disableStackTrace})}cast(e,t={}){let n=this.resolve(Object.assign({},t,{value:e})),r=t.assert===`ignore-optionality`,i=n._cast(e,t);if(t.assert!==!1&&!n.isType(i)){if(r&&PP(i))return i;let a=mP(e),o=mP(i);throw TypeError(`The value of ${t.path||`field`} could not be cast to a value that satisfies the schema type: "${n.type}". \n\nattempted value: ${a} \n`+(o===a?``:`result of cast: ${o}`))}return i}_cast(e,t){let n=e===void 0?e:this.transforms.reduce((n,r)=>r.call(this,n,e,this,t),e);return n===void 0&&(n=this.getDefault(t)),n}_validate(e,t={},n,r){let{path:i,originalValue:a=e,strict:o=this.spec.strict}=t,s=e;o||(s=this._cast(s,Object.assign({assert:!1},t)));let c=[];for(let e of Object.values(this.internalTests))e&&c.push(e);this.runTests({path:i,value:s,originalValue:a,options:t,tests:c},n,e=>{if(e.length)return r(e,s);this.runTests({path:i,value:s,originalValue:a,options:t,tests:this.tests},n,r)})}runTests(e,t,n){let r=!1,{tests:i,value:a,originalValue:o,path:s,options:c}=e,l=e=>{r||(r=!0,t(e,a))},u=e=>{r||(r=!0,n(e,a))},d=i.length,f=[];if(!d)return u([]);let p={value:a,originalValue:o,path:s,options:c,schema:this};for(let e=0;e<i.length;e++){let t=i[e];t(p,l,function(e){e&&(Array.isArray(e)?f.push(...e):f.push(e)),--d<=0&&u(f)})}}asNestedTest({key:e,index:t,parent:n,parentPath:r,originalParent:i,options:a}){let o=e??t;if(o==null)throw TypeError("Must include `key` or `index` for nested validations");let s=typeof o==`number`,c=n[o],l=Object.assign({},a,{strict:!0,parent:n,value:c,originalValue:i[o],key:void 0,[s?`index`:`key`]:o,path:s||o.includes(`.`)?`${r||``}[${s?o:`"${o}"`}]`:(r?`${r}.`:``)+e});return(e,t,n)=>this.resolve(l)._validate(c,l,t,n)}validate(e,t){let n=this.resolve(Object.assign({},t,{value:e})),r=t?.disableStackTrace??n.spec.disableStackTrace;return new Promise((i,a)=>n._validate(e,t,(e,t)=>{xP.isError(e)&&(e.value=t),a(e)},(e,t)=>{e.length?a(new xP(e,t,void 0,void 0,r)):i(t)}))}validateSync(e,t){let n=this.resolve(Object.assign({},t,{value:e})),r,i=t?.disableStackTrace??n.spec.disableStackTrace;return n._validate(e,Object.assign({},t,{sync:!0}),(e,t)=>{throw xP.isError(e)&&(e.value=t),e},(t,n)=>{if(t.length)throw new xP(t,e,void 0,void 0,i);r=n}),r}isValid(e,t){return this.validate(e,t).then(()=>!0,e=>{if(xP.isError(e))return!1;throw e})}isValidSync(e,t){try{return this.validateSync(e,t),!0}catch(e){if(xP.isError(e))return!1;throw e}}_getDefault(e){let t=this.spec.default;return t==null?t:typeof t==`function`?t.call(this,e):BP(t)}getDefault(e){return this.resolve(e||{})._getDefault(e)}default(e){return arguments.length===0?this._getDefault():this.clone({default:e})}strict(e=!0){return this.clone({strict:e})}nullability(e,t){let n=this.clone({nullable:e});return n.internalTests.nullable=FP({message:t,name:`nullable`,test(e){return e!==null||this.schema.spec.nullable}}),n}optionality(e,t){let n=this.clone({optional:e});return 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t.name&&(n.exclusiveTests[t.name]=!!t.exclusive),n.tests=n.tests.filter(e=>e.OPTIONS.name!==t.name||!i&&e.OPTIONS.test!==r.OPTIONS.test),n.tests.push(r),n}when(e,t){!Array.isArray(e)&&typeof e!=`string`&&(t=e,e=`.`);let n=this.clone(),r=hP(e).map(e=>new NP(e));

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`),resolved:n}})}}),n}strip(e=!0){let t=this.clone();return t.spec.strip=e,t}describe(e){let t=(e?this.resolve(e):this).clone(),{label:n,meta:r,optional:i,nullable:a}=t.spec;return{meta:r,label:n,optional:i,nullable:a,default:t.getDefault(e),type:t.type,oneOf:t._whitelist.describe(),notOneOf:t._blacklist.describe(),tests:t.tests.filter((e,t,n)=>n.findIndex(t=>t.OPTIONS.name===e.OPTIONS.name)===t).map(t=>{let n=t.OPTIONS.params&&e?IP(Object.assign({},t.OPTIONS.params),e):t.OPTIONS.params;return{name:t.OPTIONS.name,params:n}})}}get"~standard"(){let e=this;return{version:1,vendor:`yup`,async validate(t){try{return{value:await e.validate(t,{abortEarly:!1})}}catch(e){if(e instanceof xP)return{issues:UP(e)};throw e}}}}};WP.prototype.__isYupSchema__=!0;for(let e of[`validate`,`validateSync`])WP.prototype[`${e}At`]=function(t,n,r={}){let{parent:i,parentPath:a,schema:o}=RP(this,t,n,r.context);return o[e](i&&i[a],Object.assign({},r,{parent:i,path:t}))};for(let e 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super.optional()}required(e){return super.required(e)}notRequired(){return super.notRequired()}nullable(){return super.nullable()}nonNullable(e){return super.nonNullable(e)}strip(e){return super.strip(e)}}.prototype;var JP=/^(\d{4}|[+-]\d{6})(?:-?(\d{2})(?:-?(\d{2}))?)?(?:[ T]?(\d{2}):?(\d{2})(?::?(\d{2})(?:[,.](\d{1,}))?)?(?:(Z)|([+-])(\d{2})(?::?(\d{2}))?)?)?$/;function YP(e){let t=XP(e);if(!t)return Date.parse?Date.parse(e):NaN;if(t.z===void 0&&t.plusMinus===void 0)return new Date(t.year,t.month,t.day,t.hour,t.minute,t.second,t.millisecond).valueOf();let n=0;return t.z!==`Z`&&t.plusMinus!==void 0&&(n=t.hourOffset*60+t.minuteOffset,t.plusMinus===`+`&&(n=0-n)),Date.UTC(t.year,t.month,t.day,t.hour,t.minute+n,t.second,t.millisecond)}function XP(e){let t=JP.exec(e);return t?{year:ZP(t[1]),month:ZP(t[2],1)-1,day:ZP(t[3],1),hour:ZP(t[4]),minute:ZP(t[5]),second:ZP(t[6]),millisecond:t[7]?ZP(t[7].substring(0,3)):0,precision:t[7]?.length??void 0,z:t[8]||void 0,plusMinus:t[9]||void 0,hourOffset:ZP(t[10]),minuteOffset:ZP(t[11])}:null}function ZP(e,t=0){return Number(e)||t}var QP=/^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/,$P=/^((https?|ftp):)?\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i,eF=/^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i,tF=RegExp(`^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(\\.\\d+)?(([+-]\\d{2}(:?\\d{2})?)|Z)$`),nF=e=>PP(e)||e===e.trim(),rF={}.toString();function iF(){return new aF}var aF=class extends WP{constructor(){super({type:`string`,check(e){return e instanceof String&&(e=e.valueOf()),typeof e==`string`}}),this.withMutation(()=>{this.transform((e,t)=>{if(!this.spec.coerce||this.isType(e)||Array.isArray(e))return e;let n=e!=null&&e.toString?e.toString():e;return n===rF?e:n})})}required(e){return super.required(e).withMutation(t=>t.test({message:e||SP.required,name:`required`,skipAbsent:!0,test:e=>!!e.length}))}notRequired(){return super.notRequired().withMutation(e=>(e.tests=e.tests.filter(e=>e.OPTIONS.name!==`required`),e))}length(e,t=CP.length){return this.test({message:t,name:`length`,exclusive:!0,params:{length:e},skipAbsent:!0,test(t){return t.length===this.resolve(e)}})}min(e,t=CP.min){return this.test({message:t,name:`min`,exclusive:!0,params:{min:e},skipAbsent:!0,test(t){return t.length>=this.resolve(e)}})}max(e,t=CP.max){return this.test({name:`max`,exclusive:!0,message:t,params:{max:e},skipAbsent:!0,test(t){return 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t=XP(e);return t?t.precision===r:!1}})}ensure(){return this.default(``).transform(e=>e===null?``:e)}trim(e=CP.trim){return this.transform(e=>e==null?e:e.trim()).test({message:e,name:`trim`,test:nF})}lowercase(e=CP.lowercase){return this.transform(e=>PP(e)?e:e.toLowerCase()).test({message:e,name:`string_case`,exclusive:!0,skipAbsent:!0,test:e=>PP(e)||e===e.toLowerCase()})}uppercase(e=CP.uppercase){return this.transform(e=>PP(e)?e:e.toUpperCase()).test({message:e,name:`string_case`,exclusive:!0,skipAbsent:!0,test:e=>PP(e)||e===e.toUpperCase()})}};iF.prototype=aF.prototype;var oF=e=>e!=+e;function sF(){return new cF}var cF=class extends WP{constructor(){super({type:`number`,check(e){return e instanceof Number&&(e=e.valueOf()),typeof e==`number`&&!oF(e)}}),this.withMutation(()=>{this.transform((e,t)=>{if(!this.spec.coerce)return e;let n=e;if(typeof n==`string`){if(n=n.replace(/\s/g,``),n===``)return NaN;n=+n}return this.isType(n)||n===null?n:parseFloat(n)})})}min(e,t=wP.min){return this.test({message:t,name:`min`,exclusive:!0,params:{min:e},skipAbsent:!0,test(t){return t>=this.resolve(e)}})}max(e,t=wP.max){return this.test({message:t,name:`max`,exclusive:!0,params:{max:e},skipAbsent:!0,test(t){return t<=this.resolve(e)}})}lessThan(e,t=wP.lessThan){return this.test({message:t,name:`max`,exclusive:!0,params:{less:e},skipAbsent:!0,test(t){return t<this.resolve(e)}})}moreThan(e,t=wP.moreThan){return this.test({message:t,name:`min`,exclusive:!0,params:{more:e},skipAbsent:!0,test(t){return t>this.resolve(e)}})}positive(e=wP.positive){return this.moreThan(0,e)}negative(e=wP.negative){return this.lessThan(0,e)}integer(e=wP.integer){return this.test({name:`integer`,message:e,ski

34pAbsent:!0,test:e=>Number.isInteger(e)})}truncate(){return this.transform(e=>PP(e)?e:e|0)}round(e){let t=[`ceil`,`floor`,`round`,`trunc`];if(e=e?.toLowerCase()||`round`,e===`trunc`)return this.truncate();if(t.indexOf(e.toLowerCase())===-1)throw TypeError(`Only valid options for round() are: `+t.join(`, `));return this.transform(t=>PP(t)?t:Math[e](t))}};sF.prototype=cF.prototype;var lF=new Date(``),uF=e=>Object.prototype.toString.call(e)===`[object Date]`,dF=class e extends WP{constructor(){super({type:`date`,check(e){return uF(e)&&!isNaN(e.getTime())}}),this.withMutation(()=>{this.transform((t,n)=>!this.spec.coerce||this.isType(t)||t===null?t:(t=YP(t),isNaN(t)?e.INVALID_DATE:new Date(t)))})}prepareParam(e,t){let n;if(NP.isRef(e))n=e;else{let r=this.cast(e);if(!this._typeCheck(r))throw TypeError(`\`${t}\` must be a Date or a value that can be \`cast()\` to a Date`);n=r}return n}min(e,t=TP.min){let n=this.prepareParam(e,`min`);return this.test({message:t,name:`min`,exclusive:!0,params:{min:e},skipAbsent:!0,test(e){return e>=this.resolve(n)}})}max(e,t=TP.max){let n=this.prepareParam(e,`max`);return this.test({message:t,name:`max`,exclusive:!0,params:{max:e},skipAbsent:!0,test(e){return e<=this.resolve(n)}})}};dF.INVALID_DATE=lF,dF.prototype;function fF(e,t=[]){let n=[],r=new Set,i=new Set(t.map(([e,t])=>`${e}-${t}`));function a(e,t){let a=(0,iP.split)(e)[0];r.add(a),i.has(`${t}-${a}`)||n.push([t,a])}for(let t of Object.keys(e)){let n=e[t];r.add(t),NP.isRef(n)&&n.isSibling?a(n.path,t):AP(n)&&`deps`in n&&n.deps.forEach(e=>a(e,t))}return oP.default.array(Array.from(r),n).reverse()}function pF(e,t){let n=1/0;return e.some((e,r)=>{var i;if((i=t.path)!=null&&i.includes(e))return n=r,!0}),n}function mF(e){return(t,n)=>pF(e,t)-pF(e,n)}var hF=(e,t,n)=>{if(typeof e!=`string`)return e;let r=e;try{r=JSON.parse(e)}catch{}return n.isType(r)?r:e};function gF(e){if(`fields`in e){let t={};for(let[n,r]of Object.entries(e.fields))t[n]=gF(r);return e.setFields(t)}if(e.type===`array`){let t=e.optional();return t.innerType&&=gF(t.innerType),t}return e.type===`tuple`?e.optional().clone({types:e.spec.types.map(gF)}):`optional`in e?e.optional():e}var _F=(e,t)=>{let n=[...(0,iP.normalizePath)(t)];if(n.length===1)return n[0]in e;let r=n.pop(),i=(0,iP.getter)((0,iP.join)(n),!0)(e);return!!(i&&r in i)},vF=e=>Object.prototype.toString.call(e)===`[object Object]`;function yF(e,t){let n=Object.keys(e.fields);return Object.keys(t).filter(e=>n.indexOf(e)===-1)}var bF=mF([]);function xF(e){return new SF(e)}var SF=class extends WP{constructor(e){super({type:`object`,check(e){return vF(e)||typeof e==`function`}}),this.fields=Object.create(null),this._sortErrors=bF,this._nodes=[],this._excludedEdges=[],this.withMutation(()=>{e&&this.shape(e)})}_cast(e,t={}){let n=super._cast(e,t);if(n===void 0)return this.getDefault(t);if(!this._typeCheck(n))return n;let r=this.fields,i=t.stripUnknown??this.spec.noUnknown,a=[].concat(this._nodes,Object.keys(n).filter(e=>!this._nodes.includes(e))),o={},s=Object.assign({},t,{parent:o,__validating:t.__validating||!1}),c=!1;for(let e of a){let a=r[e],l=e in n,u=n[e];if(a){let r;s.path=(t.path?`${t.path}.`:``)+e,a=a.resolve({value:u,context:t.context,parent:o});let i=a instanceof WP?a.spec:void 0,l=i?.strict;if(i!=null&&i.strip){c||=e in n;continue}r=!t.__validating||!l?a.cast(u,s):u,r!==void 0&&(o[e]=r)}else l&&!i&&(o[e]=u);(l!==e in o||o[e]!==u)&&(c=!0)}return c?o:n}_validate(e,t={},n,r){let{from:i=[],originalValue:a=e,recursive:o=this.spec.recursive}=t;t.from=[{schema:this,value:a},...i],t.__validating=!0,t.originalValue=a,super._validate(e,t,n,(e,i)=>{if(!o||!vF(i)){r(e,i);return}a||=i;let s=[];for(let e of this._nodes){let n=this.fields[e];n&&!NP.isRef(n)&&s.push(n.asNestedTest({options:t,key:e,parent:i,parentPath:t.path,originalParent:a}))}this.runTests({tests:s,value:i,originalValue:a,options:t},n,t=>{r(t.sort(this._sortErrors).concat(e),i)})})}clone(e){let t=super.clone(e);return t.fields=Object.assign({},this.fields),t._nodes=this._nodes,t._excludedEdges=this._excludedEdges,t._sortErrors=this._sortErrors,t}concat(e){let t=super.concat(e),n=t.fields;for(let[e,t]of Object.entries(this.fields)){let r=n[e];n[e]=r===void 0?t:r}return t.withMutation(t=>t.setFields(n,[...this._excludedEdges,...e._excludedEdges]))}_getDefault(e){if(`default`in this.spec)return super._getDefault(e);if(!this._nodes.length)return;let t={};

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r=(0,iP.getter)(e,!0);return this.transform(i=>{if(!i)return i;let a=i;return _F(i,e)&&(a=Object.assign({},i),n||delete a[e],a[t]=r(i)),a})}json(){return this.transform(hF)}exact(e){return this.test({name:`exact`,exclusive:!0,message:e||DP.exact,test(e){if(e==null)return!0;let t=yF(this.schema,e);return t.length===0||this.createError({params:{properties:t.join(`, `)}})}})}stripUnknown(){return this.clone({noUnknown:!0})}noUnknown(e=!0,t=DP.noUnknown){typeof e!=`boolean`&&(t=e,e=!0);let n=this.test({name:`noUnknown`,exclusive:!0,message:t,test(t){if(t==null)return!0;let n=yF(this.schema,t);return!e||n.length===0||this.createError({params:{unknown:n.join(`, `)}})}});return n.spec.noUnknown=e,n}unknown(e=!0,t=DP.noUnknown){return this.noUnknown(!e,t)}transformKeys(e){return this.transform(t=>{if(!t)return t;let n={};for(let r of Object.keys(t))n[e(r)]=t[r];return n})}camelCase(){return this.transformKeys(aP.camelCase)}snakeCase(){return 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34consumeCaptures(){this.remainingPlans().forEach(e=>{if(!e.plan.san.includes(`x`))return;let t=this.capturePieces[e.plan.toSquare];if(!Uz(e))return;let n=ru(this.remainingPlans(),t=>t.plan.toSquare===e.plan.toSquare&&t.plan.san.includes(`x`));if(!t||H(n))return;let r=this.planPrecedingCaptures[e.plan.toSquare],i=!1;if(r){let t=oC.fromColor(this.position.get(e.plan.toSquare)?.color)===oC.flip(e.plan.side);r.plan.san.includes(`x`)&&!t&&(i=!0),this.consume(r)}this.consume(n),this.addSection(()=>{let r=this;return[`The`,` `,x(Jz,{exclusive:!0,get items(){return n.map(e=>Xz(e)||`${Hz(e.piece)} on ${e.plan.fromSquare}`)}}),` `,A(()=>r.nextAdverb()),` `,x(Yz,{plans:n,get children(){return[i?`recaptures`:`captures`,` the `,A(()=>Hz(t)),` on`,` `,A(()=>e.plan.toSquare)]}})]})})}pawnPlansConsumer(){let e=ru(this.remainingPlans(),e=>Ad([`a`,`b`,`c`,`d`,`e`,`f`,`g`,`h`],t=>e.plan.san?.startsWith(t)));if(e=jd(e,e=>e.plan.san),this.side===`black`&&(e=bd(e)),H(e))return 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35=wz.getMoves(e.currentQuizGroup),i=Ad(r,e=>e.learning);if(!H(n)&&!e.activeOptions?.lichessMistakes||i){let t={moves:(r??[]).map(e=>({...e,learning:!e.learning&&void 0})),line:e.currentQuizGroup.line,side:e.currentQuizGroup.side,epd:e.currentQuizGroup.epd,retry:!0};if(i){let n=e.activeQueue.findIndex((t,n)=>{let r=e.activeQueue[n-1];return Ad(wz.getMoves(t),e=>e.learning===!1)||t.synthetic?!1:!!(r&&t.line.length<r.line.length)});if(n===-1)e.activeQueue.push(t);else{for(let t=n;t<e.activeQueue.length;t++)if(!Ad(wz.getMoves(e.activeQueue[t]),e=>e.learning===!1)){n=t;break}e.activeQueue.splice(n,0,t);let r=Od(e.activeQueue,n+1),i=Id(r,e=>e.synthetic).length;if(i>0){let n=r[i+1];r=Vl(r,i),n&&(r=[...wz.appendExpandedQuizGroup(t,n),...r],e.activeQueue=r)}}}else e.activeQueue.push(...wz.appendExpandedQuizGroup(Bl(e.activeQueue)??null,t))}let a=e.currentQuizGroup.lichessMistake;if(e.currentQuizGroup&&!e.previousQuizGroup&&e.activeOptions?.filter!==`daily`&&qV(),a)u.markGameMistakeReviewed(a),t.onGameMistakeReviewed();else if(r&&!e.currentQuizGroup?.retry){let t=r.map(t=>{let n=e.failedReviewPositionMoves[t.sanPlus];return{side:t.side,epd:t.epd,sanPlus:t.sanPlus,correct:!n,daily:e.activeOptions?.filter===`daily`&&!e.currentQuizGroup?.synthetic}});u.markMovesReviewed(t)}}if(e.currentQuizGroup&&!wz.isPlansQuiz(e.currentQuizGroup)&&(e.previousQuizGroup=e.currentQuizGroup),e.currentQuizGroup=e.activeQueue[0]??null,e.activeQueue=e.activeQueue.slice(1),u.setupCurrentQuizGroup(),!e.currentQuizGroup){let n=r.chessboard.get(e=>e.position),i=r.chessboard.getCurrentEpd(),a=(e.activeOptions?.repertoireId?t.getStandardAndSuperRepertoires()?.[e.activeOptions.repertoireId]:t.superRepertoires?.[e.previousQuizGroup.side])?.positionResponses[i]??[],o=H(a);if(J().flagEnabled(`bonus_moves`)&&(o||YE)&&!t.onboarding.isOnboarding&&!l.isReviewingMistakes()&&!n.gameOver()){e.bonusMove=!0,Q().replaceView(eB,{direction:`right`}),r.chessboard.makeStockfishMove({nodes:YD.STANDARD,pv:3,excludedSans:a.map(e=>e.sanPlus)}).then(e=>{e||u.finishReview()}).catch(e=>{qn(e),u.finishReview()});return}u.finishReview();return}}),finishReview:()=>i(([e,t])=>{if(J().getFrontendSetting(`reviewStyle`).value===o0.EntireLineOnce&&e.originalQueue)for(let t of e.originalQueue)t.synthetic&&r.entireLineOnceSessionSeenEpds.add(t.epd);s(t),t.updateRepertoireStructures(),r.onSessionEnd.callAndClear(),Q().cutView(),Q().pushView(uV);let n=Object.values(e.allReviewPositionMoves).flatMap(Object.values).filter(e=>e.reviewed).length;qB(e.notificationAttribution,n),K(`review.review_complete`,{...KB(e.notificationAttribution),onboarding:t.onboarding.isOnboarding,reviewed_moves:n,filter:e.activeOptions?.filter}),qV()}),setupCurrentQuizGroup:()=>i(([e,t])=>{if(e.quizGroupStage=0,e.incorrectGuessesThisQuizGroup=0,e.failedReviewPositionMoves={},e.completedReviewPositionMoves={},!e.currentQuizGroup){r.chessboard.setTapOptions([]),r.chessboard.setMode(`normal`),r.chessboard.highlightSquare(null);return}e.reviewSide=e.currentQuizGroup.side;let n=wz.getPlans(e.currentQuizGroup);r.chessboard.prepareReviewQuizGroup({side:e.currentQuizGroup.side,plansQuiz:!!n}),n?u.setupPlans():(r.chessboard.playLine(e.currentQuizGroup.line,{animated:!e.viewingLastQuizGroup,onFinished:()=>{}}),eH(e.currentQuizGroup.epd))}),restorePausedQuizGroup:()=>i(([e,t])=>{if(!e.currentQuizGroup)return;e.reviewSide=e.currentQuizGroup.side;let n=wz.getPlans(e.currentQuizGroup);if(r.chessboard.prepareReviewQuizGroup({side:e.currentQuizGroup.side,plansQuiz:!!n}),n){e.quizGroupStage===3?(r.chessboard.setFrozen(!0),r.chessboard.set(t=>{t.showPlans=!0,t.plans=(wz.getCompletedPlans(e.currentQuizGroup,e.planIndex)??[]).map(e=>e.metaPlan)})):u.setupPlans();return}let i=e.currentQuizGroup,a=e.quizGroupStage===3,o=a?Bl(Object.values(e.completedReviewPositionMoves)):void 0,s=o?[...i.line,o.sanPlus]:i.line;r.chessboard.playLine(s,{animated:!1}),r.chessboard.setFrozen(a)}),playCorrectMove:({markAs:e})=>{i(([t])=>{let n=l.getNextReviewPositionMove();if(!n)return;let i=r.chessboard.get(e=>e.position).validateMoves([n.sanPlus])?.[0];i&&(u.markRemaining({markAs:e,completed:!0}),t.completedReviewPositionMoves[n.sanPlus]=n,r.chessboard.setFrozen(!0),r.chessboard.makeMove(i,{animate:!0,sound:`move`}))})},markRemaining:({markAs:e,completed:t})=>i(([n])=>

35{l.getRemainingReviewPositionMoves().forEach(r=>{e===`correct`?n.reviewStats.correct++:H(n.failedReviewPositionMoves)&&e===`incorrect`&&n.reviewStats.incorrect++,e===`incorrect`&&(n.failedReviewPositionMoves[r.sanPlus]=r),e&&(n.allReviewPositionMoves[r.epd][r.sanPlus].failed=e===`incorrect`,n.allReviewPositionMoves[r.epd][r.sanPlus].reviewed=!0),t&&(n.completedReviewPositionMoves[r.sanPlus]=r)})}),giveUp:()=>i(([e,t])=>{if(e.currentQuizGroup&&wz.isPlansQuiz(e.currentQuizGroup)){e.planIndex++,u.setupPlans();return}e.quizGroupStage=l.hasAnnotationsForCurrentQuizGroup()&&e.quizGroupStage!==1?1:2,u.markRemaining({markAs:`incorrect`,completed:!1})},`giveUp`),stopReviewing:()=>i(([e,t])=>{c(e,t)}),pausePracticeSession:()=>i(([e,t])=>{ZV(e,t.browsingState.state.activeRepertoireId)&&r.chessboard.setTapOptions([])}),buildQueue:e=>a(([t,n,r])=>{let i=n.onboarding.isOnboarding;if(Kt(n.repertoires))return[];let a=n.lockedMoves,o=[],s=new Date,c=Y().getStandardAndSuperRepertoires(),l=e.repertoireId?[c[e.repertoireId]]:Object.values(n.superRepertoires);l=wd(l);let u=J().getFrontendSetting(`reviewStyle`),d=[o0.EntireLineEvery,o0.EntireLineOnce].includes(u.value),f=wu([`daily`,`recommended`,`due`,`difficult-due`],e.filter)?n.numMovesDueFromEpd:null;Kl(l,t=>{let n=t.side,r=new Set,c=(l,u,p)=>{if(f?.[t.id]?.[l]===0)return;let m=ru(t.positionResponses[l]??[],e=>!cz(a,n,e));m=jd(m,e=>1-Math.random()*(e.incidence??0));let h=ru(m,e=>!e.isDisabled),g=[...p];if(h?.[0]?.mine){let r=Ad(h,e=>sC.isReviewDue(e.srs,s)),a=Ad(h,e=>sC.isDifficult(e.srs)),c=e.filter===`difficult-due`&&a&&r||e.filter===`recommended`&&r||e.filter===`due`&&r||e.filter===`difficult`&&a||e.filter===`daily`&&r||e.filter===`all`||e.filter===`early`;if(c||d){let r={moves:Kd(h,e=>e.sanPlus).map(t=>({...t,learning:e.forceFirstPractice?!0:!i&&t.srs?.firstReview})),epd:l,line:u,side:n};if(c&&(H(p)||(r.precedingGroups=p),o.push(r)),d&&!H(r.line)){let e={...r,synthetic:!0,moves:mu(r.moves,e=>({...e,learning:void 0}))};g.push(e)}e.includePlans&&h.forEach(e=>{let r=t.plans[e.epdAfter];if(!r)return;let i=new ip(`${e.epdAfter} 0 1`),a=Kz(r,n,i);o.push({plans:[...a],remainingPlans:a,completedPlans:[],line:[...u,e.sanPlus],side:n,epd:l})})}}mu(m,e=>{r.has(e.epdAfter)||(r.add(e.epdAfter),c(e.epdAfter,[...u,e.sanPlus],g))})};c(e.startPosition??`rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -`,e.startLine??[],[])});let p=e.maxMoves??Number(J().getFrontendSetting(`recommendedMovesSize`).value);if(e.filter===`daily`&&(p=j6().getRemainingToday(Y().totalMovesDue??0)),(e.filter===`recommended`||e.filter===`daily`)&&(o=jV(o,p,s.getTime())),e.filter===`early`){let t=jd(mu(o,e=>wz.getMoves(e)?.[0].srs?.dueAt))[wV]??`0`,n=Pd(ru(o,e=>{let n=wz.getMoves(e);return n?.[0].srs?.dueAt?n[0].srs?.dueAt<=t:!1}),p),r=mu(n,e=>e.epd);o=e.includePlans?ru(o,e=>r.includes(e.epd)):n}let m=Dl(o,e=>wz.isPlansQuiz(e)).true,h=zz();if(m>h){let e=h/m;o=ru(o,t=>!wz.isPlansQuiz(t)||Math.random()<e)}return o}),buildQueueFromMistakes:e=>i(([t,n])=>{let r=[];return Kl(e,e=>{let t=n.superRepertoires[e.side].positionResponses[e.epd];r.push({moves:t,lichessMistake:AI(e),epd:e.epd,line:mp.fromPgn(e.line),side:e.side})}),r}),inspectCurrentLine:()=>i(([e,t])=>{let n=e.currentQuizGroup;if(!n)return;let r=(wz.getMoves(n)?.length??0)>1,i=[...new Set(wz.getMoves(n)?.flatMap(e=>e.repertoireIds||[])??[])].map(e=>Y().repertoires[e]);if(H(i)&&e.activeOptions?.repertoireId&&t.repertoires&&(i=[t.getStandardAndSuperRepertoires()[e.activeOptions.repertoireId]]),H(i)){qn(Error(`No repertoire found for inspecting current line`),{extra:{options:JSON.stringify(e.activeOptions)}});return}let a=e=>{t.backToOverview(),Q().pushView(PY),t.browsingState.actions.setActiveRepertoire(e.id),t.browsingState.handles.chessboard.playLine(n.line,{animated:!1})};i.length===1?a(i[0]):Q().pushView($,{props:{header:`Select a repertoire`,bodyPadding:!0,children:(()=>{var e=YV(),t=e.firstChild;return N(e,r?`These moves are`:`This move is`,t),e})(),actions:i.map(e=>({onPress:()=>{a(e)},text:e.name,style:`primary`}))}})}),dropPausedSession:()=>i(([e,t])=>{Q().mode!==`review`&&c(e,t)}),updateQueue:e=>i(([t])=>{t.activeQueue=u.buildQueue(e)??[],t.reviewStats.correct=0,t.reviewStats.incorrect=0}),reviewLine:(e,t)=>i(([n,r])=>{let i=r.onboarding.isOnboarding,a=t.side;r.backToOverview();let o=[],s=fp,c=[];

35e.forEach(e=>{let n=t.positionResponses[s],r=su(t.positionResponses[s],t=>t.sanPlus===e);r&&(r.mine&&o.push({moves:(n??[]).map(e=>({...e,learning:!i&&e.srs?.firstReview})),line:[...c],epd:s,side:a}),s=r.epdAfter,c.push(e))}),u.startReview({repertoireId:t.id,customQueue:o,cameFrom:`review_specific_line`})},`reviewLine`)};return r.chessboard.set(e=>{e.delegate={askForPromotionPiece:e=>a(([t])=>{if(!e.promotion)return null;let n=t.currentQuizGroup?wz.getMoves(t.currentQuizGroup)?.[0]:null;if(!n)return null;let i=r.chessboard.get(e=>e.position).validateMoves([n?.sanPlus]);if(!i)return null;let a=i[0];return e.promotion?a.promotion??null:null}),onPositionUpdated:()=>{u.onPositionUpdate()},madeMove:Hi,tappedSquare:e=>i(([t])=>{let n=wz.getRemainingPlans(t.currentQuizGroup,t.planIndex);if(!n)return;let a=n[0],o=wu(a.toSquares,e);o&&r.chessboard.setTapOptions([]),r.chessboard.showMoveFeedback({square:e,result:o?`correct`:`incorrect`,size:o?`large`:`small`},()=>{i(([e])=>{o&&(e.planIndex++,u.setupPlans())})})}),shouldMakeMove:e=>i(([t])=>{let n=r.chessboard.getCurrentEpd();if(n!==t.currentQuizGroup?.epd&&!t.bonusMove)return!1;let a=t.currentQuizGroup?wz.getMoves(t.currentQuizGroup):[],o=su(a,t=>e.san===t.sanPlus),s=Y().onboarding.isOnboarding;if(o){o.learning||t.reviewStats.correct++,s&&K(`onboarding.practice.move`,{result:`correct`,prior_wrong_guesses:t.incorrectGuessesThisQuizGroup}),t.completedReviewPositionMoves[o.sanPlus]=o;let n=Ad(a,e=>Kt(t.completedReviewPositionMoves[e.sanPlus])),c=!n,d=J().getFrontendSetting(`reviewPauseBehavior`),f=t.incorrectGuessesThisQuizGroup>0,p=d.value===d0.Always||d.value===d0.WhenAnnotation&&l.hasAnnotationsForCurrentQuizGroup()||d.value===d0.WhenWrong&&f,m=c&&p,h=c&&!p;return wz.getMoves(t.currentQuizGroup)?.forEach(e=>{t.allReviewPositionMoves[e.epd][e.sanPlus].reviewed=!0}),m&&(t.quizGroupStage=3,r.chessboard.setFrozen(!0)),r.chessboard.showMoveFeedback({square:e.to,result:`correct`},()=>{i(([e,t])=>{n&&r.chessboard.backOne({clear:!0}),h&&u.setupNextQuizGroup()})}),!0}

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You reach this decision in <!> of games with this repertoire. Its remaining difficulty comes from the position and depth of the line, not something a different move would fix.`),RK=l(`<div class="flex flex-col gap-1.5"><p class="text-xs font-semibold text-secondary">How common is your move?</p><p class="text-xs text-secondary">Only <span class="font-mono tabular-nums text-warning"></span> of players at your level play <span class=font-mono></span> here.</p><div class="relative h-[4px] w-full max-w-60 overflow-hidden rounded-full bg-gray-40"><div class="absolute inset-y-0 left-0 bg-warning"></div></div><p class="text-[11px] leading-snug text-tertiary">Rare choices are harder to drill in. 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Playing the same move in both (when it's sound) makes both easier to remember.</p><!><!>`),UK=l(`<div class="flex flex-col gap-1 rounded-sm border border-gray-37 p-2"><p class="text-[11px] font-medium text-tertiary">Also affects the score, but not something a different move would fix</p><!><!>`),WK=l(`<div class="flex flex-col gap-2 text-xs"><div class="grid w-max grid-cols-[auto_auto] items-baseline gap-x-3 gap-y-1"><!><!><!><!><!></div><div class="grid w-max grid-cols-[auto_auto] items-baseline gap-x-3 gap-y-1">`),GK=l(`<span class="text-right font-mono text-secondary whitespace-nowrap tabular-nums">`),KK=l(`<div class=mt-2>`),qK=l(`<div><button type=button><i></i><span>`),JK=l(`<div class="absolute -inset-y-[2px] w-px bg-gray-60">`),YK=l(`<div class="flex flex-col gap-[3px]"><div class="flex flex-row items-baseline justify-between gap-2"><span></span></div><div class="relative h-[3px] w-full rounded-full bg-gray-40"><div>`),XK=l(`<span class="mr-1 inline-block rounded-sm bg-gray-40 px-1 font-semibold text-secondary">#`),ZK=l(`<span>Lichess`),QK=l(`<i class="fa fa-up-right-from-square text-[9px]">`),$K=l(`<div class="mb-1 grid w-full grid-cols-[1fr_auto] items-center gap-2"><p>Here you play <span class=font-semibold>`),eq=l(`<div class="mt-1.5 flex flex-col gap-1"><!><!><!>`),tq=l(`<div><div class="relative w-full aspect-square overflow-hidden rounded-sm pointer-events-none bg-gray-21"></div><!>`),nq=l(`<p class="mb-1 text-[10px] uppercase tracking-wide text-tertiary">`),rq=l(`<span class="flex items-baseline justify-end gap-2 font-mono text-secondary whitespace-nowrap tabular-nums"><span></span><span><!><!>`),iq=l(`<div class="rounded-sm bg-gray-30 p-3"><div class="grid grid-cols-2 gap-x-4 gap-y-1 text-xs"><!><!><!><!><!></div><p class="text-tertiary text-xs mt-3 mb-1 font-medium">Repertoire learnability</p><div class="grid grid-cols-2 gap-x-4 gap-y-1 text-xs"><!><!><!><!></div><p class="text-tertiary text-xs mt-3 mb-1 font-medium">Distributions <span class="text-tertiary font-normal">(min / Q1 / med / Q3 / max)</span></p><div class="grid grid-cols-[auto_1fr] gap-x-3 gap-y-0.5 text-xs"><span class="font-mono text-secondary"></span><!></div><p class="text-tertiary text-xs mt-3 mb-1 font-medium"> (mean |SHAP|)`),aq=l(`<span class="font-mono text-secondary">`),oq=l(`<span>`),sq=l(`<div class="flex flex-col gap-0.5">`),cq=l(`<div class="flex flex-row items-center gap-2 text-xs"><span class="text-tertiary w-4 text-right">.</span><span class="text-right font-mono text-secondary whitespace-nowrap tabular-nums w-16"></span><span class="text-right font-mono text-secondary whitespace-nowrap tabular-nums w-12">%`),lq=`text-tertiary whitespace-nowrap`,uq=`text-right font-mono text-secondary whitespace-nowrap tabular-nums`,dq=2,fq=1,pq=.05,mq=[`hard`,`medium`,`noFix`,`easy`],hq={hard:{title:`Hard to learn`,color:`text-danger`,defaultCollapsed:!1},medium:{title:`A bit tricky`,color:`text-warning`,defaultCollapsed:!1},noFix:{title:`Hard to memorize, but nothing to change`,color:`text-secondary`,defaultCollapsed:!0},easy:{title:`Easy`,color:`text-success`,defaultCollapsed:!0}};function gq(e){let t={};for(let n of Object.values(e))for(let e of n)e.epdAfter in t||(t[e.epdAfter]=e.epd);return t}function _q(e,t,n){let r=[],i=new Set,a=e.epd;for(;a&&!i.has(a)&&(r.push(a),i.add(a),a!==`rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -`);)a=t[a];r.reverse(),r.push(e.epdAfter);for(let e=r.length-1;e>=0;e--){let t=n[r[e]];if(t?.fullName){let e=kF.toEcoNames(t);return e.lastVariation?`${e.name}: ${e.lastVariation}`:e.name}}return null}function vq(e){return{uncommon:e.predictedMoveProb<pq,inconsistent:e.knnValidNeighborCount>0&&e.knnValidMatchRatio<.999}}function yq(e){let t=vq(e);return t.uncommon||t.inconsistent}function bq(e){return e.predictedDifficulty<fq?`easy`:yq(e)?e.predictedDifficulty>=dq?`hard`:`medium`:`noFix`}function xq(e){return e>=dq?`text-danger`:e>=fq?`text-warning`:`text-success`}function Sq(e){return e.split(` `)[1]===`b`?`black`:`white`}function Cq(e){return`${Math.floor(e.positionProgression/2)+1}${Sq(e.epd)===`black`?`…`:`. `}${e.san}`}var wq=()=>{let e=()=>X().state.activeRepertoireId,[t,n]=o(!1),[r,i]=o(null),[a,s]=o({}),c=e=>{try{let t=new ip(EE.toFen(e));Q().getActiveChessboard().set(e=>{e.previewPosition=ez(t)})}catch{}},l=()=>{Q().getActiveChessboard().set(e=>{e.previewPosition=null})},u=_(()=>{let t=e();return t?hN.call([`admin.learnabilityDebug`,{repertoireId:t}]):null}),d=_(()=>{let e=u(),n={hard:[],medium:[],noFix:[],easy:[]};if(!e)return n;let r=e.moves;t()&&(r=r.filter(e=>e.actualWrongInFirst10!==null));for(let e of r)n[bq(e)].push(e);for(let e of Object.values(n))e.sort((e,t)=>

35t.predictedDifficulty-e.predictedDifficulty);return n}),f=e=>a()[e]??hq[e].defaultCollapsed,p=_(()=>{let e=X().derived.activeRepertoire(),t=Y().ecoCodeLookup,n=e?gq(e.positionResponses):{};return e=>_q(e,n,t)});return x($,{header:`Learnability`,actions:[],bodyPadding:!1,get children(){return x(ce,{get fallback(){return TK()},get children(){return x(j,{get when(){return u()},children:e=>(()=>{var a=EK(),o=a.firstChild,u=o.firstChild,m=o.nextSibling,h=m.nextSibling;return N(a,x(Tq,{get summary(){return e().summary}}),o),u._$$click=()=>n(e=>!e),m.addEventListener(`mouseleave`,l),N(m,x(b,{each:mq,children:e=>x(Eq,{bucket:e,get moves(){return d()[e]},get nameForMove(){return p()},get collapsed(){return f(e)},onToggleCollapsed:()=>s(t=>({...t,[e]:!f(e)})),get expandedMove(){return r()},onToggleMove:e=>i(t=>t===e?null:e),onHoverMove:c})})),N(h,x(Fq,{label:`Model internals`,get children(){return x(Gq,{get summary(){return e().summary}})}})),M(()=>`shrink-0 rounded-sm px-2 py-1 text-[11px] font-medium transition-colors ${t()?`bg-purple-55 text-white`:`bg-gray-34 text-tertiary hover:text-secondary`}`,(e,t)=>{P(u,e,t)}),a})()})}})}})};function Tq(e){let t=()=>e.summary.learnabilityScore,n=()=>{let e=t();return e===null?`text-secondary`:e>=.66?`text-success`:e>=.33?`text-warning`:`text-danger`};var r=OK(),i=r.firstChild,a=i.firstChild,o=a.nextSibling;return o.nextSibling,N(r,x(j,{get when(){return t()!==null},get fallback(){return kK()},get children(){var e=DK(),r=e.firstChild;return N(r,()=>`${((t()??0)*100).toFixed(0)}%`),N(e,x(wK,{field:`learnability_score`,class:`text-xs font-medium text-tertiary`,children:`Learnability score`}),null),M(()=>`text-3xl font-semibold leading-none tabular-nums ${n()}`,(e,t)=>{P(r,e,t)}),e}}),i),N(i,()=>e.summary.totalMoves,a),N(i,()=>e.summary.movesWithActual,o),r}function Eq(e){let t=hq[e.bucket];return x(j,{get when(){return e.moves.length>0},get children(){var n=jK(),r=n.firstChild,i=r.firstChild,a=i.nextSibling,o=a.nextSibling,s=o.firstChild.nextSibling;return s.nextSibling,se(r,`click`,e.onToggleCollapsed,!0),N(a,()=>t.title),N(o,()=>e.moves.length,s),N(n,x(j,{get when(){return!e.collapsed},get children(){var t=AK();return N(t,x(b,{get each(){return e.moves},children:t=>x(Dq,{move:t,get openingName(){return e.nameForMove(t)},get expanded(){return e.expandedMove===t.epd+t.san},onToggle:()=>e.onToggleMove(t.epd+t.san),onHover:()=>e.onHoverMove(t.epd)})})),t}}),null),M(()=>({e:`fa fa-chevron-right text-[10px] text-tertiary transition-transform ${e.collapsed?``:`rotate-90`}`,t:`text-sm font-semibold ${t.color}`}),({e,t},n)=>{P(i,e,n?.e),P(a,t,n?.t)}),n}})}function Dq(e){let t=()=>vq(e.move);return[(()=>{var n=PK(),r=n.firstChild,i=r.firstChild,a=i.nextSibling,o=a.nextSibling,s=o.nextSibling;return se(n,`mouseenter`,e.onHover),se(n,`click`,e.onToggle,!0),N(i,()=>Cq(e.move)),N(a,()=>e.openingName??``),N(r,x(j,{get when(){return t().uncommon},get children(){return MK()}}),o),N(r,x(j,{get when(){return t().inconsistent},get children(){return NK()}}),s),N(s,()=>e.move.predictedDifficulty.toFixed(1)),M(()=>({e:`cursor-pointer rounded-sm px-2 py-1.5 hover:bg-gray-32 ${e.expanded?`bg-gray-32`:``}`,t:`shrink-0 font-mono text-xs tabular-nums ${xq(e.move.predictedDifficulty)}`}),({e,t},r)=>{P(n,e,r?.e),P(s,t,r?.t)}),n})(),x(j,{get when(){return e.expanded},get children(){var t=FK();return se(t,`mouseenter`,e.onHover),N(t,x(Oq,{get move(){return e.move}})),t}})]}function Oq(e){let t=()=>vq(e.move),n=()=>yq(e.move);var r=IK(),i=r.firstChild,a=i.nextSibling,o=a.nextSibling;return N(i,x(Vq,{get epd(){return e.move.epd},get san(){return e.move.san},tone:`neutral`,positionHeader:!0})),N(r,x(j,{get when(){return n()},get fallback(){return x(kq,{get move(){return e.move}})},get children(){return[x(j,{get when(){return t().uncommon},get children(){return x(Aq,{get move(){return e.move}})}}),x(j,{get when(){return t().inconsistent},get children(){return x(jq,{get move(){return e.move}})}}),x(Mq,{get move(){return e.move}})]}}),a),N(r,x(Fq,{label:`Model attribution`,small:!0,get children(){return x(Nq,{get move(){return e.move}})}}),o),r}function kq(e){let t=()=>e.move.knnValidNeighborCount>0,n=()=>bK(`incidence`,e.move.incidence);var r=LK(),i=r.firstChild.nextSibling,a=i.firstChild,o=a.nextSibling.nextSibling,s=o.nextSibling.nextSibling;return s.nextSibling,N(a,()=>e.move.san),N(i,()=>

35t()?` and matches what you play in similar positions`:``,o),N(i,n,s),r}function Aq(e){let t=()=>e.move.predictedMoveProb;var n=RK(),r=n.firstChild.nextSibling,i=r.firstChild.nextSibling,a=i.nextSibling.nextSibling,o=r.nextSibling.firstChild;return N(i,()=>bK(`predicted_move_prob`,t())),N(a,()=>e.move.san),M(()=>`${Math.max(Math.sqrt(t())*100,t()>0?2:0)}%`,e=>{s(o,`width`,e)}),n}function jq(e){let t=_(()=>e.move.knnValidNeighbors.filter(e=>e.countedAsValid).sort((e,t)=>e.matchesQueryMove===t.matchesQueryMove?e.countedRank-t.countedRank:e.matchesQueryMove?1:-1)),n=_(()=>e.move.knnValidNeighbors.filter(e=>!e.countedAsValid).sort((e,t)=>t.similarity-e.similarity)),r=_(()=>t().filter(e=>!e.matchesQueryMove)),i=_(()=>[...new Set(r().map(e=>e.san))]),a=()=>{let e=t().length,n=r().length;return`You play ${i().join(`, `)} instead in ${n} of ${e} similar position${e===1?``:`s`}.`};var o=HK(),s=o.firstChild,c=s.nextSibling.nextSibling,l=c.nextSibling;return 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39,reviewGame:(e,t,n)=>{a(([e])=>{e.lastFetchOptions=n}),l.setActiveGame(e),t?.startFinished&&i.chessboard.playLine(e.sans),i.chessboard.set(t=>{t.associatedGame=e}),Q().ensureView(M$,{props:{game:e}}),Y().fetchNeededAnnotations(),l.resetHints(),l.setNextMove();let r=t?.startPly??0;r===0&&e.result===`black`&&(r=1),r&&(Pd(e.sans,r).forEach(e=>{i.chessboard.makeMove(e,{animate:!1,sound:`none`})}),a(([e])=>{e.ply=i.chessboard.getPly()}))},markGameAsReviewed:e=>{if(e.reviewed)return Promise.resolve();let t=Math.max(0,Date.now()-(r.reviewStartedAtMs??Date.now())),n=o.movesGuessed();return a(([t])=>{[t.dailyGame,t.activeGame].forEach(t=>{t&&t.id===e.id&&(t.reviewed=!0)})}),QS.post(`/api/v1/model_game_reviewed`,{gameId:e.id,reviewDurationMs:t,movesGuessed:n}).then(()=>{l.fetchModelGameHistory()})},guessedMove:e=>{let t=r.activeGame;if(!t)return!1;let n=r.ply,i=t.sans[n]===e.san;return i&&!l.hasGuessedPly(n)&&l.guessPly(n,dC.Good),i},guessPly:(e,t)=>{l.hasGuessedPly(e)||r.guessedPlys.alternate[e]&&t!==`good`||a(([n])=>{n.guessedPlys[t][e]=!0})},hasGuessedPly:e=>!!r.guessedPlys.good[e]||!!r.guessedPlys.inaccuracy[e]||!!r.guessedPlys.mistake[e]||!!r.guessedPlys.blunder[e],fetchModelGameHistory:()=>QS.post(`/api/v1/model_game_history`,{}).then(({data:e})=>{l.setHistory(mu(e.games,e=>GR.fromDto(e)))}),fetchDailyModelGame:e=>QS.post(`/api/v1/daily_model_game`,{date:new Date().toISOString(),forceNewGame:e?.forceNewGame??!1}).then(({data:e})=>{l.setDailyGame(e.game?GR.fromDto(e.game):null)})};return i.chessboard.set(e=>{e.delegate={completedMoveAnimation:Hi,onPositionUpdated:()=>{i.chessboard.getCurrentEpd()===Bl(r.activeGame?.epds)&&(vX(`right`),l.markGameAsReviewed(r.activeGame)),l.resetHints({resetProgress:!1}),l.setNextMove(),i.chessboard.highlightSquare(null)},madeManualMove:Hi,onBack:Hi,onReset:Hi,shouldMakeMove:e=>{let t=r.activeGame,o=i.chessboard.getCurrentEpd();if(!t)return!1;r.ply===0&&qV();let c=t.evals[r.ply],u=Bl(r.hints),d=r.hintStage===`hint`&&!!u&&`piece`in u&&e.from===u.square,f=l.guessedMove(e);if(i.chessboard.showMoveFeedback({square:e.to,result:f?`correct`:`thinking`,progress:f?void 0:.05},()=>{f&&oC.fromColor(e.color)===t.result&&l.playNextMove()}),f)return a(([e])=>{e.ply=i.chessboard.getPly()+1,e.hintStage=null}),!0;let p=i.chessboard.get(e=>e.position).clone();p.move(e);let m=dp(p);a(([e])=>{e.previewing=!0});let h=(t=()=>s(r.hintStage))=>{i.chessboard.dismissMoveFeedback({square:e.to,delay:500},()=>{for(a(([e])=>{e.previewing=!1});i.chessboard.getCurrentEpd()!==o;)i.chessboard.backOne({clear:!0});t?.()})};return GV({chessboard:i.chessboard,epd:m,nodes:YD.SHALLOW,square:e.to}).then(t=>{let n=CE({before:c,after:t,side:r.activeGame.result}),o=r.hintStage;if(i.chessboard.set(i=>{i.moveFeedback.progress=void 0,n?(RV(IV.failure),i.moveFeedback.result=n,l.guessPly(r.ply,n)):Kt(t)?(RV(IV.failure),i.moveFeedback.result=`incorrect`):(RV(IV.success),i.moveFeedback.result=`alternative`,a(([t])=>{t.validAlternateMovesGuessed[e.san]=!0,d&&(t.validHintPieceAlternateMovesGuessed[e.san]=!0),o=u$(L$(t.validAlternateMovesGuessed),L$(t.validHintPieceAlternateMovesGuessed),t.hintStage)}),l.guessPly(r.ply,`alternate`))}),n===dC.Mistake||n===dC.Blunder){let e=t?.pv;if(!e){qn(Error(`Stockfish did not return a refutation for model-game mistake`)),h();return}let[n]=p.clone().validateMoves([e],{sloppy:!0})??[];if(!n){qn(Error(`Stockfish refutation was not legal for model-game mistake`,{cause:{pv:e,epd:m}})),h();return}if(i.chessboard.getCurrentEpd()!==m){h();return}MV(s2()).then(()=>{if(i.chessboard.getCurrentEpd()!==m){h();return}i.chessboard.makeMove(n,{animate:!0,sound:`move`}).then(async()=>{h()})})}else h(()=>s(o))}).catch(e=>{n(e,{message:`Failed to fetch eval for move`}),i.chessboard.set(e=>{e.moveFeedback.progress=void 0,e.moveFeedback.result=`incorrect`}),h()}),!0}}}),VF({state:r,actions:l,derived:o,handles:i})},z$=()=>{let e=new e$({}),t=(e,t)=>Z(t=>e([t.repertoireState.openingReportsState,t.repertoireState,t]));return{chessboard:E2()[1],selectedReportIds:{},selectReport:(e,n)=>t(([t])=>{t.selectedReportIds[e]=n}),get openingsReportsByTimeRange(){return e.trackedValue()},setOpeningsReportForTimeRange:(t,n)=>{e.mutate(e=>{e[t]=n})},mutateOpeningsReportForTimeRange:(t,n)=>{e.mutate(e=>{let r=e[t];r&&n(r)})},getCurrentOpeningsReport:()=>O6().openingsReportsByTimeRange[J().getFrontendSetting(`openingsTimeRange`).value]??null,fetchOpeningsReport:()=>t(([e,n,r])=>{let i=r.userState.getFrontendSetting(`openingsTimeRange`).value;QS.post(`/api/v2/openings_report`,{timeRange:i}).then(e=>{t(([t])=>{t.setOpeningsReportForTimeRange(i,e.data)})})})}},B$=(e,t)=>

39({kind:e,projections:new Set(t)}),V$=e=>{let t=e.ui.mode,n=e.repertoireState.browsingState;return t===`review`?B$(`review`,[`review-position`,`annotations`,`position-reports`,`badge`]):t===`audit`?B$(`audit`,[`audit-table`,`position-reports`,`badge`]):t===`build`?B$(`build-position`,[`browsing-progress`,`active-position`,`annotations`,`position-reports`,`badge`]):t===`browse`?B$(`browse-position`,[`browsing-progress`,`active-position`,`annotations`,`position-reports`,`badge`]):t===`side_overview`?B$(`repertoire-overview`,[`browsing-progress`,`badge`]):t===`model_games`||t===`plans_and_model_games`?B$(`model-games`,[`annotations`,`badge`]):t===`openings_report`?B$(`openings-report`,[`badge`]):t===`browseCourses`?B$(`course-browser`,[`badge`]):t===`play`||t===`mistakes`?B$(`other`,[`badge`]):n.state.activeRepertoireId?B$(`repertoire-overview`,[`browsing-progress`,`badge`]):B$(t===`overview`?`home`:`other`,[`badge`])},H$=(e,t)=>e.projections.has(t),U$=[`rnbqkb1r/pppp1ppp/4pn2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -`],W$=()=>({autoBookmarks:{},expectedNumMovesFromEpd:{},movesFromEpd:{},numMovesFromEpd:{},numMovesNeededFromEpd:{}}),G$=(e,t)=>{for(let n=e.length-1;n>=0;n--){let r=t[e[n]];if(r)return r}},K$=(e,t)=>{let n=G$(e,t);if(!n)return null;let r=kF.getAppropriateEcoName(n);return{ecoCode:n,lastVariation:Bl(r[1])??null,fullVariation:r[1]?.join(`, `)??null,fullName:n.fullName,name:r[0]}},q$=e=>{let{ecoCodeLookup:t,getCurrentThreshold:n,graph:r,repertoires:i}=e,a={};return mu(Su(i),e=>{let i=new Set,o=[...r.autoBookmarks[e.id]??[]],s={},c={},l=n()*4,u=(n,a,d,f=`black`,p)=>{if(i.has(n)){ru(o,e=>e.epds.includes(n)).length>0&&(o=ru(o,e=>!d.includes(e.epd)));return}i.add(n);let m=r.numMovesFromEpd[e.id]?.[n]??0,h=p?.incidence??0;if(p){if(h<l)return;let r=K$(d,t),i={repertoireId:e.id,epd:n,line:a,epds:d,numMovesFromHere:m,ecoCode:r,incidence:h};h>=l&&f===e.side&&!U$.includes(n)&&a.length>1&&(o=o.filter(e=>{if(!d.includes(e.epd)||e.root)return!0;let t=(d.length-e.epds.length)/2;return h/e.incidence>1.1**t}),r&&o.push(i)),r&&!r.fullName.includes(`:`)&&(s[r.fullName]=i),a.length===1&&r&&(c[a[0]]={...i,root:!0})}let g=ru(e.positionResponses[n]??[],e=>!e.isDisabled);g=jd(g,e=>-(e.incidence??0)),g.map(e=>u(e.epdAfter,[...a,e.sanPlus],d.concat(e.epdAfter),oC.flip(f),e))};u(fp,[],[fp]),o=jd(o,e=>-e.incidence),o=Kd(o,e=>e.ecoCode.fullName);let d=mu(c,e=>e.ecoCode.name);o=ru(o,e=>!d.includes(e.ecoCode.name)),o=Pd(jd(o,e=>-e.incidence),12),o=jd(o,e=>e.ecoCode.fullName);let f=_u(o,e=>e.line[0]);Kl(f,(e,t)=>{let n=c[t];n&&e.unshift(n)});let p=jd(Object.values(f),e=>-e[0].numMovesFromHere),m=new Set;Kl(p,e=>{for(let t=0;t<e.length;t++){let n=e[t],r=n.ecoCode.name,i=e.filter(e=>e.ecoCode.name===r);if(!m.has(r)&&i.length>1&&!Ad(e,e=>e.ecoCode.fullName===r)){let n=s[r];n&&e.splice(t,0,n)}m.add(r),i.length>1&&n.ecoCode.lastVariation&&(n.multipleInThisOpening=!0)}}),a[e.id]=qa(Object.values(p))}),a},J$=e=>{let{ecoCodeLookup:t,getCurrentThreshold:n,getSingleElo:r,getThreshold:i,includeAutoBookmarks:a=!0,repertoireGrades:o,repertoires:s}=e;if(!s)return W$();let c=r(),l=W$();return mu(Su(s),e=>{let t=i(e.id??null),n=new Set,r=e.side,a={},o={},s={},u={},d=(n,i,l)=>{if(i.has(n)){let e=new Set,t=new Set;return l?.mine&&(e.add(l.id),l?.needed&&t.add(l.id)),{myMoves:e,myNeededMoves:e,expectedNumMoves:0}}let f=vM(l?.incidence??1,t,r,c);if(l?.isExcluded)return{myMoves:new Set,myNeededMoves:new Set,expectedNumMoves:0,excludedMoves:f};i.add(n);let p=ru(e.positionResponses[n]??[],e=>e.needed&&!e.isDisabled),[m,...h]=p,g=0,_=new Set,v=new Set;for(let e of p){let t=d(e.epdAfter,i,e);g+=t.expectedNumMoves;for(let e of t.myMoves)_.add(e);for(let e of t.myNeededMoves)v.add(e)}return m?.mine&&(f=g),a[n]=_.size,o[n]=v.size,s[n]=_,u[n]=f,l?.mine&&(_.add(l.id),l?.needed&&v.add(l.id)),i.delete(n),{expectedNumMoves:f,myMoves:_,myNeededMoves:v}};d(fp,n,void 0),l.numMovesFromEpd[e.id]=a,l.numMovesNeededFromEpd[e.id]=o,l.movesFromEpd[e.id]=s,l.expectedNumMovesFromEpd[e.id]=u}),mu(Su(s),e=>{let t=i(e.id??null),n=new Set,r=o[e.id],a=e.side,s=new Set,u=(i,o)=>

39{if(n.has(i))return{expectedNumMoves:0};n.add(i);let d=o?.incidence??1,f=ru(e.positionResponses[i]??[],e=>e.needed&&!e.isDisabled),p=Math.min(1,Md(f.map(e=>e.incidence??0))/d),m=0,h=vM(d,t,a,c),g=l.movesFromEpd[e.id][i]??[];mV(!Kt(g),`movesFromHere is nil`);let _=!r?.biggestMisses?.[i];if(_&&(s=new Set([...s,...g])),f.length===0)m=h;else{let e=h*(1-p),t=0,n=0;for(let e of f){let r=u(e.epdAfter,e).expectedNumMoves;t+=r,n=Math.max(n,r)}m=o?.mine?t+e:n}return m=Math.max(1,m),_&&(m=0),{expectedNumMoves:m+ +!!o?.mine}},d=u(fp,void 0);l.expectedNumMovesFromEpd[e.id][fp]=d.expectedNumMoves+s.size}),a&&(l.autoBookmarks=q$({ecoCodeLookup:t,getCurrentThreshold:n,graph:l,repertoires:s})),l};function Y$(){return`scheduler`in window&&`yield`in window.scheduler?window.scheduler.yield():new Promise(e=>{setTimeout(e,0)})}var X$=()=>{let e=new Map;return{waitFor:(t,n)=>{let r=e.get(t);if(r)return r;let i=n().catch(n=>{throw e.get(t)===i&&e.delete(t),n});return e.set(t,i),i}}},Z$=()=>({numMovesDueFromEpd:{white:{},black:{}},earliestReviewDueFromEpd:{white:{},black:{}},masteryFromEpd:{},numLockedFromEpd:{},lockedShareFromEpd:{}}),Q$=()=>({movesByMastery:{},masteryOverall:0}),$$=()=>({numResponses:void 0,numMyEnabledMoves:{white:0,black:0},numResponsesAboveThreshold:void 0}),e1=()=>({myResponsesLookup:void 0,epdNodes:{white:{},black:{}}}),t1=()=>({allRepertoiresEmpty:!0,hasCourseRepertoires:!1,hasMultipleRepertoires:!1,repertoiresList:[]}),n1=()=>({progressStates:{},startMastery:{}}),r1=()=>({earliestReviewDue:null,totalMovesDue:null}),i1=e=>jd(Su(e),e=>e.side===`white`?0:1,e=>e.createdAt),a1=e=>{let t={};return Kl(aC,n=>{let r={name:`Super Repertoire`,side:n,createdAt:new Date().toISOString(),plans:{},id:`${n}`,eloRanges:[],positionResponses:{}},i={};Kl(ru(Su(e),e=>e.side===n),e=>{Kl(e.positionResponses,t=>{Kl(t,t=>{let n=i[t.epd]??=new Map,a=n.get(t.id);if(a)a.repertoireIds??=[],a.repertoireIds.push(e.id);else{let i={...t,repertoireIds:[e.id]};r.positionResponses[t.epd]??=[],r.positionResponses[t.epd].push(i),n.set(t.id,i)}})})}),t[n]=r}),t},o1=(e,t)=>{let n=new Date,r=null,i=0;for(let a of Object.values(e))for(let e of Object.values(a.positionResponses))for(let o of e){if(o.isDisabled||!o.srs||cz(t,a.side,o))continue;let e=o.srs.dueAt;e&&(r===null||e<r)&&(r=e),sC.isReviewDue(o.srs,n)&&i++}return{earliestReviewDue:r,totalMovesDue:i}},s1=(e,t)=>{for(let n=e.length-1;n>=0;n--){let r=t[e[n]];if(r)return r}},c1=async e=>{try{return{ok:!0,value:await e}}catch(e){return{ok:!1,error:e}}},l1=null,u1=()=>({homePromise:c1(hN.call([`home.fetchHome_v2`,{date:(0,RN.default)().format(`YYYY-MM-DD`)}])),supplementaryPromise:c1(QS.get(`/api/v1/openings/supplementary`).then(({data:e})=>e)),mistakesPromise:c1(QS.get(`/api/v2/get_lichess_mistakes`).then(({data:e})=>e)),dailyGamePromise:c1(QS.post(`/api/v1/daily_model_game`,{date:new Date().toISOString(),forceNewGame:!1}).then(({data:e})=>e)),modelGameHistoryPromise:c1(QS.post(`/api/v1/model_game_history`,{}).then(({data:e})=>e))}),d1=()=>{l1??=u1()},f1=()=>{let e=l1??u1();return l1=null,e},p1=null,m1=e=>Object.values(e.autoFillBuilds).some(e=>!e.isComplete&&!e.error),h1=[1300,1500],g1=e=>[e.repertoireState,e],_1=(e,t)=>{let r=(t,n)=>e(e=>t(g1(e)),n?`repertoire.${n}`:void 0),i=(e,n)=>t(t=>e(g1(t))),a=new e$(void 0),o=new e$({}),s=new e$([]),c=new e$({}),l=new e$({white:{},black:{}}),u=X$(),d=new Set,f=tt(()=>{let e=a.trackedValue();return e?a1(e):null}),p=(e,t)=>n=>n?e[n]?.coverageTarget??t:t,m=_(()=>{let[e]=i(e=>e);if(!e.repertoires)return t1();let t=i1(e.repertoires);return{allRepertoiresEmpty:tu(Nu(e.repertoires,e=>H(e.positionResponses))),hasCourseRepertoires:t.some(e=>e.course!==void 0),hasMultipleRepertoires:Dd(e.repertoires)>2,repertoiresList:t}},{lazy:!0}),h=et(()=>{let[e]=i(e=>e),t=e.superRepertoires;return t?o1(t,g()):r1()}),g=et(()=>{let[e]=i(e=>e);return!e.repertoires||J().isSubscribed()||e.onboarding.isOnboarding?rz:sz(Su(e.repertoires),100)}),v=et(()=>{let[e]=i(e=>e),t=J().getCurrentThreshold(),n=J().getSingleElo();return J$({ecoCodeLookup:e.ecoCodeLookup,getCurrentThreshold:()=>t,getSingleElo:()=>n,getThreshold:e.repertoires?p(e.repertoires,t):()=>t,includeAutoBookmarks:!1,repertoireGrades:e.repertoireGrades,repertoires:e.repertoires})}),y=et(()=>{let[e]=i(e=>e),t=e.browsingState.state.activeRepertoireId;if(!t||!e.repertoires)return{};let n=e.repertoires[t];if(!n)return{};let r={[t]:n},a=J().getCurrentThreshold();return q$({ecoCodeLookup:e.ecoCodeLookup,getCurrentThreshold:()=>a,graph:v(),repertoires:r})}),b=et(()=>{let[e]=i(e=>e),t=e.superRepertoires;if(!e.repertoires||!t)return n1();let n=v(),r=g(),a={},o={};return mu(Su(e.repertoires),t=>{let i=ju(TH.getAllEnabledRepertoireMoves(t),e=>e.id),s=new Set,c=new Set,l=(e,n)=>{if(s.has(e)){n?.mine&&c.add(n.id);return}s.add(e);let r=t.positionResponses[e]??[];for(let e of r)l(e.epdAfter,e);n?.mine&&c.add(n.id),s.delete(e)};l(fp);let u=0,d=0;

39c.forEach(e=>{let n=i[e];n&&(u+=cz(r,t.side,n)?0:sC.toMasteryPercentage(n.srs)??0,d++)});let f=u/d;a[t.id]=Number.isNaN(f)?0:f;let p=e.repertoireGrades[t.id]?.biggestMiss,m=n.numMovesNeededFromEpd?.[t.id]?.[`rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -`]??0,h=n.expectedNumMovesFromEpd[t.id]?.[`rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -`]??1,g=Kt(p),_=e.repertoireGrades[t.id]?.coverage,v=g?1:Math.min(.99,_??yM(m/h)),y=m>0?Math.max(.01,v):v,b=0;for(let e of Su(i))e.mine&&cz(r,t.side,e)&&b++;o[t.id]={completed:g,percentComplete:y,numLocked:b}}),{progressStates:o,startMastery:a}}),x=et(()=>{let[e]=i(e=>e);return e.lichessMistakes?pz(g(),e.superRepertoires,e.lichessMistakes).open:null}),S=et(()=>{let[e]=i(e=>e),t=e.repertoires,n=e.superRepertoires;if(!t||!n)return Z$();let r=Z$(),a=g();return mu([...Su(t),...Su(n)],e=>{let t=t=>cz(a,e.side,t)?0:sC.toMasteryPercentage(t.srs)??0,n=t=>!t.isDisabled&&!cz(a,e.side,t),i=new Set,o=ju(TH.getAllEnabledRepertoireMoves(e),e=>e.id),s={},c={},l={},u={},d={},f=(r,i,p)=>{if(i.has(r)){let e=new Set;return p?.mine&&e.add(p.id),{myMoves:e,mastery:0}}i.add(r);let m=e.positionResponses[r]??[],h=new Set;for(let e of m){let t=f(e.epdAfter,i,e);for(let e of t.myMoves)h.add(e)}let g=0,_=null,v=0,y=0,b=0;h.forEach(r=>{let i=o[r];if(!i)return;cz(a,e.side,i)&&b++;let s=t(i);mV(s>=0),g+=s,y++,n(i)&&(i.srs&&sC.isReviewDue(i.srs)&&v++,i.srs?.dueAt&&(_===null||_>i.srs.dueAt)&&(_=i.srs.dueAt))}),s[r]=v,u[r]=b,_&&(c[r]=_);let x=b;p?.mine&&(g+=t(p),y++,cz(a,e.side,p)&&x++),d[r]=y>0?x/y:0;let S=g/y;return Number.isNaN(S)&&(S=0),l[r]=S,p?.mine&&h.add(p.id),i.delete(r),{mastery:g,myMoves:h}};f(fp,i,void 0),r.numMovesDueFromEpd[e.id]=s,r.earliestReviewDueFromEpd[e.id]=c,r.masteryFromEpd[e.id]=l,r.numLockedFromEpd[e.id]=u,r.lockedShareFromEpd[e.id]=d}),r}),C=et(()=>{let[e]=i(e=>e),t=e.repertoires,n=e.superRepertoires;if(!t||!n)return Q$();let r=Q$(),a=Object.values(n).flatMap(e=>Object.values(e.positionResponses).flat().filter(e=>e.mine&&!e.isDisabled)),o=g();return r.masteryOverall=a.length===0?0:Nd(a,e=>cz(o,e.side,e)?0:sC.toMasteryPercentage(e.srs)??0)/a.length,mu(Su(t),e=>{r.movesByMastery[e.id]={new:0,learning:0,solid:0,mastered:0},TH.getAllEnabledRepertoireMoves(e).forEach(t=>{if(cz(o,e.side,t)){r.movesByMastery[e.id].new++;return}if(!t.srs)return;let n=cC.fromInterval(t.srs.interval);r.movesByMastery[e.id][n]++})}),r}),w=et(()=>{let[e]=i(e=>e),t=e.superRepertoires;if(!e.repertoires||!t)return e1();let n={...e.repertoires,...t};return{myResponsesLookup:Nu(n,e=>qa(Object.values(e.positionResponses)).filter(e=>e.mine)),epdNodes:Nu(n,e=>{let t={};return qa(Object.values(e.positionResponses)).flatMap(e=>[e.epd,e.epdAfter]).forEach(e=>{t[e]=!0}),t})}}),T=et(()=>{let[e]=i(e=>e),t=e.superRepertoires;if(!e.repertoires||!t)return $$();let n={...e.repertoires,...t};return{numResponses:Nu(e.repertoires,e=>qa(Object.values(e.positionResponses)).length),numMyEnabledMoves:Nu(n,e=>ru(qa(Object.values(e.positionResponses)),e=>e.mine&&!e.isDisabled).length),numResponsesAboveThreshold:Nu(e.repertoires,e=>qa(Object.values(e.positionResponses)).filter(e=>e.needed&&!e.isDisabled&&e.mine).length)}});return{get autoBookmarks(){return y()},autoFillBuilds:{},onCorrectGameMovesCallbacks:new AE,get superRepertoires(){return f.trackedValue()},lichessMistakes:null,moveAnnotations:{},courses:{},needsToRefetchLichessMistakes:!1,needsNewModelGame:!1,get numMovesFromEpd(){return v().numMovesFromEpd},get numMovesNeededFromEpd(){return v().numMovesNeededFromEpd},get movesFromEpd(){return v().movesFromEpd},get masteryFromEpd(){return S().masteryFromEpd},get masteryOverall(){return C().masteryOverall},get movesByMastery(){return C().movesByMastery},get numMovesDueFromEpd(){return S().numMovesDueFromEpd},get numLockedFromEpd(){return S().numLockedFromEpd},get lockedShareFromEpd(){return S().lockedShareFromEpd},startOnboarding:e=>{r(([t])=>{ZN(),t.onboarding.isOnboarding=!0,t.onboarding.autoplay=!0,e?.side&&(t.onboarding.side=e.side),Q().clearViews(),e?.courseId?(t.onboarding.courseId=e.courseId,Q().pushView(YZ)):Q().pushView(GZ)})},askAboutSourceOrEndOnboarding:()=>{r(([e])=>{Math.random()<.1?Q().pushView(uQ):Q().pushView($Z)})},get earliestReviewDueFromEpd(){return S().earliestReviewDueFromEpd},get earliestReviewDue(){return h().earliestReviewDue},get totalMovesDue(){return h().totalMovesDue},get expectedNumMovesFromEpd(){return v().expectedNumMovesFromEpd},epdIncidences:{white:{},black:{}},deleteMoveState:{modalOpen:!1,isDeletingMove:!1},get ecoCodes(){return s.trackedValue()},get ecoCodeLookup(){return c.trackedValue()},setEcoCodes:e=>{s.set(e),c.set(ju(e,e=>e.epd))},addedLineState:null,isUpdatingEloRange:!1,get repertoires(){return a.trackedValue()},setRepertoires:e=>{a.set(e)},mutateRepertoires:e=>{a.mutate(t=>{t&&e(t)})},touchRepertoires:()=>{a.touch()},get repertoiresList(){return m().repertoiresList},get homeProgressStates(){return b().progressStates},get lockedMoves(){return g()},get lichessMistakesVisible(){return x()},get startMasteryFromEpd(){return b().startMastery},browsingState:s$(e,t),modelGamesState:R$(),openingReportsState:z$(),reviewState:rH(),get repertoireGrades(){return o.trackedValue()},setRepertoireGrades:e=>{o.set(e)},mutateRepertoireGrades:e=>{o.mutate(e)},hasCompletedRepertoireInitialization:void 0,get positionReports(){return l.trackedValue()},setPositionReports:e=>{l.set(e)},mutatePositionReports:e=>{l.mutate(e)},isInitialLoadInProgress:!1,onboarding:{isOnboarding:!1,autoplay:!1,side:`white`,courseId:void 0},importedCourseId:void 0,currentLine:[],get epdNodes(){return w().epdNodes},get myResponsesLookup(){return w().myResponsesLookup},get numMyMoves(){return T().numMyEnabledMoves},get numMyEnabledMoves(){return T().numMyEnabledMoves},get numResponses(){return T().numResponses},get numResponsesAboveThreshold(){return T().numResponsesAboveThreshold},divergencePosition:void 0,divergenceIndex:void 0,getLastEcoCode:e=>i(([t])=>s1(e,t.ecoCodeLookup)),initState:()=>r(([e,t])=>

39{if(e.isInitialLoadInProgress)return;e.isInitialLoadInProgress=!0,e.setRepertoires(void 0),e.lichessMistakes=null;let i=t.userState.getFrontendSetting(`openingsTimeRange`).value,{homePromise:a,supplementaryPromise:o,mistakesPromise:s,dailyGamePromise:c,modelGameHistoryPromise:l}=f1(),u=()=>{c1(QS.post(`/api/v2/openings_report`,{timeRange:i}).then(({data:e})=>e)).then(e=>{e.ok&&r(([t])=>{t.openingReportsState.setOpeningsReportForTimeRange(i,e.value)},`initState.openings_report.apply`)})},d=a.then(e=>e.ok?(r(([t])=>{t.repertoireFetched(e.value.repertoire);let n=e.value.dailyReviews.map(e=>({epd:e.epd,correct:e.correct,side:e.side,date:e.date}));j6().setReviewsFromResponse(n)},`initState.home.apply_payload`),u(),!0):(n(e.error,{message:`Failed to load home data`}),!1));o.then(e=>{e.ok&&(r(([t])=>{t.setEcoCodes(e.value.ecoCodes)},`initState.supplementary.apply`),d.then(e=>{e&&r(([e])=>{e.updateActivePositionAfterSupplementaryLoad()},`initState.supplementary.active_position`)}))}),c.then(e=>{e.ok&&r(([t])=>{let n=e.value.game;t.modelGamesState.actions.setDailyGame(n?GR.fromDto(n):null)},`initState.daily_game.apply`)}),l.then(e=>{e.ok&&r(([t])=>{t.modelGamesState.actions.setHistory(mu(e.value.games,e=>GR.fromDto(e)))},`initState.model_game_history.apply`)}),Promise.all([a,s,d]).then(([e,t,n])=>{r(([i])=>{if(t.ok?i.lichessMistakes=t.value.mistakes:t.error.response?.status===401?(i.lichessMistakes=[],KS().then(e=>{r(([t,n])=>{n.userState.setUser(e)},`initState.fetchUserAfterMistakes401`)})):(i.lichessMistakes=[],console.warn(`[repertoire_state] Failed to load online game mistakes`,t.error)),n&&e.ok&&(t.ok&&t.value.repertoire&&i.repertoireFetched(t.value.repertoire),t.ok&&t.value.numC

39orrectMoves)){let e={initialDue:i.getTotalDue(),initialDate:i.getEarliestDue(),numCorrect:t.value.numCorrectMoves};i.onCorrectGameMovesCallbacks.call(e)}},`initState.mistakes.apply`)}),Promise.all([a,o,s,c,l]).finally(()=>{r(([e])=>{e.isInitialLoadInProgress=!1},`initState.finish`)})},`initState`),importIntoRepertoire:({pgn:e,repertoireId:t,siteGamesSource:n,studyChapterIds:i,studyId:a})=>QS.post(`/api/v2/openings/import`,{pgn:e,repertoireId:t,studyId:a,studyChapterIds:i,siteGamesSource:n}).then(e=>{let{data:n}=e;r(([e,r])=>{e.repertoireFetched(n),e.getNumResponsesBelowThreshold(r.repertoireState.getRepertoireThreshold(t??null),null)>10?Q().pushView(oQ):(vX(`right`),Q().clearViews(),Q().pushView(eQ))})}),analyzeMoveOnLichess:(e,t,n)=>r(([r])=>{let i=new FormData;i.append(`pgn`,`
40          [Variant "From Position"]
41          [FEN "${e}"]
42
43          ${n===`white`?`1.`:`1...`} ${t}
44        `);let a=window.open(`about:blank`,`_blank`);QS.post(`https://lichess.org/api/import`,i).then(({data:e})=>{let t=e.url;a.location=`${t}/${n}#999`})}),analyzeLineOnLichess:(e,t)=>r(([n])=>{if(H(e)){window.open(`https://lichess.org/analysis`,`_blank`);return}let r=t??mp.sideOfLastMove(e);window.open(`https://lichess.org/analysis/pgn/${e.join(`_`)}?color=${r}`,`_blank`)}),onMove:()=>r(([e])=>{},`onMove`),updateMove:(e,t)=>r(([n])=>QS.post(`/api/v1/openings/update_move`,{response:e,repertoireId:t}).then(({data:t})=>{Z(n=>{let r=new Set;r.add(e.epd),n.repertoireState.repertoireFetched(t,{keepPositionReports:r})})})),toggleMove:(e,t,n,i)=>r(([r])=>QS.post(`/api/v2/openings/toggle_move`,{response:e,disable:t,repertoireId:i,line:n}).then(({data:e})=>{Z(t=>{t.repertoireState.repertoireFetched(e)})})),updateRepertoireStructures:(e={})=>r(([t,n])=>{t.repertoires&&t.mutatePositionReports(n=>{Kl(t.repertoires,(t,r)=>{n[r]=e.keepPositionReports?Object.fromEntries(Object.entries(n[r]??{}).filter(([t])=>e.keepPositionReports.has(t))):{}})})},`updateRepertoireStructures`),getStandardAndSuperRepertoires:()=>i(([e])=>({...e.repertoires,...e.superRepertoires}),`getStandardAndSuperRepertoires`),trimRepertoire:(e,t)=>r(([n])=>QS.post(`/api/v2/openings/trim`,{threshold:e,repertoireIds:[t]}).then(({data:e})=>{r(([t])=>{t.repertoireFetched(e)})}).finally(Hi),`deleteMoveConfirmed`),autoFillRepertoire:(e,t,n,i=!1,a,o)=>r(([r])=>hN.call([`openings.autoFillRepertoire`,{buildId:n,repertoireId:e,stylePoints:t,highBudget:i,startEpd:a,startLine:o}]),`autoFillRepertoire`),startAutoFillBuild:e=>r(([t])=>{t.autoFillBuilds[e.buildId]={buildId:e.buildId,repertoireId:e.repertoireId,stylePoints:e.stylePoints,expectedMoves:Math.max(1,e.expectedMoves),initialMoves:t.numMyMoves[e.repertoireId]??0,movesAdded:0,totalMoves:t.numMyMoves[e.repertoireId]??0,candidateLines:[],openingUpdates:[],characteristics:null,outcome:null,isComplete:!1,isHydrated:!1,error:null},t.ensureAutoFillPolling()},`startAutoFillBuild`),syncAutoFillBuilds:()=>r(([e])=>hN.call([`openings.autoFillActiveBuilds`]).then(e=>{r(([t])=>{for(let n of e){let e=t.autoFillBuilds[n.buildId];if(!e){if(n.status!==`running`)continue;let e=Math.max(0,n.totalMoves-n.movesAdded),r=t.expectedNumMovesFromEpd[n.repertoireId]?.[fp];t.autoFillBuilds[n.buildId]={buildId:n.buildId,repertoireId:n.repertoireId,stylePoints:null,expectedMoves:r==null?Math.max(1,n.movesAdded*2):Math.max(1,r-e),initialMoves:e,movesAdded:n.movesAdded,totalMoves:n.totalMoves,candidateLines:[],openingUpdates:[],characteristics:null,outcome:null,isComplete:!1,isHydrated:!1,error:null};continue}e.isComplete||e.error||(e.movesAdded=Math.max(e.movesAdded,n.movesAdded),e.totalMoves=Math.max(e.totalMoves,n.totalMoves),n.status===`completed`&&n.outcome?(e.movesAdded=n.movesAdded,e.totalMoves=n.totalMoves,e.outcome=n.outcome,e.isComplete=!0,K(`repertoire.auto_fill_completed`,{via:`poll`}),t.awaitAutoFillHydration(e.buildId).catch(Hi)):n.status===`failed`&&(e.error=n.error??`Autofill failed`,K(`repertoire.auto_fill_failed`,{error:e.error,via:`poll`})))}t.ensureAutoFillPolling()})}).catch(Hi),`syncAutoFillBuilds`),ensureAutoFillPolling:()=>r(([e])=>{m1(e)&&p1===null&&(p1=window.setInterval(()=>{r(([e])=>{if(!m1(e)){p1!==null&&(window.clearInterval(p1),p1=null);return}e.syncAutoFillBuilds()})},3e3))},`ensureAutoFillPolling`),handleAutoFillWebsocketMessage:e=>r(([t])=>

44{if(typeof e==`object`){if(`AutoFillProgress`in e){let n=e.AutoFillProgress,r=t.autoFillBuilds[n.build_id];if(!r)return;if(r.movesAdded=Math.max(r.movesAdded,n.moves_added),r.totalMoves=Math.max(r.totalMoves,n.total_moves),n.candidate_lines.length>0){let e=new Set(r.candidateLines.map(e=>e.pgn));for(let t of n.candidate_lines)e.has(t.pgn)||(e.add(t.pgn),r.candidateLines.push(t))}if(n.opening_updates.length>0){let e=new Map(r.openingUpdates.map((e,t)=>[e.id,t]));for(let t of n.opening_updates){let n=e.get(t.id);if(n!==void 0){let e=r.openingUpdates[n];e.sans=t.sans,e.status=t.status}else e.set(t.id,r.openingUpdates.length),r.openingUpdates.push(t)}}n.characteristics&&(r.characteristics=n.characteristics);return}if(`AutoFillComplete`in e){let n=e.AutoFillComplete,r=t.autoFillBuilds[n.build_id];if(!r||r.isComplete||r.error)return;r.outcome={summary:n.summary,characteristics:n.characteristics},r.isComplete=!0,K(`repertoire.auto_fill_completed`,{via:`websocket`}),t.awaitAutoFillHydration(r.buildId).catch(Hi);return}if(`AutoFillError`in e){let n=e.AutoFillError,r=t.autoFillBuilds[n.build_id];if(!r||r.isComplete||r.error)return;r.error=n.message,K(`repertoire.auto_fill_failed`,{error:n.message,via:`websocket`})}}},`handleAutoFillWebsocketMessage`),addMoves:(e,t)=>i(([n])=>QS.post(`/api/v2/openings/add_moves`,{moves:e,repertoireId:t}).then(({data:e})=>(r(([t])=>{t.repertoireFetched(e)}),e))),deleteMove:(e,t)=>r(([n])=>(n.deleteMoveState.isDeletingMove=!0,QS.post(`/api/v2/openings/delete_move`,{response:e,repertoireId:t}).then(({data:e})=>{r(([t])=>{t.repertoireFetched(e)})}).finally(()=>{r(([e])=>{e.deleteMoveState.isDeletingMove=!1,e.deleteMoveState.response=null,e.deleteMoveState.modalOpen=!1,e.onRepertoireChange()})})),`deleteMoveConfirmed`),deleteRepertoire:e=>r(([t])=>{QS.post(`/api/v2/openings/delete`,{repertoireId:e}).then(({data:e})=>{r(([t])=>{t.repertoireFetched(e),t.onRepertoireChange()})}).catch(e=>{n(e,{message:`Deletion failed`,toast:!0})})},`deleteRepertoire`),getRepertoires:({side:e,includeSupers:t}={})=>i(([n])=>{if(!n.repertoires)return[];let r=t?n.getStandardAndSuperRepertoires():n.repertoires;return e===void 0?Su(r):ru(r,t=>t.side===e)}),getDefaultRepertoire:e=>i(([t])=>{if(t.repertoires)return su(t.repertoires,t=>t.side===e)}),exportPgn:(e,t)=>{r(([n])=>{let r=n.repertoires?.[e],i=(r.name||Eo(r.side)).replace(/\\/g,`\\\\`).replace(/"/g,`\\"`),a=rP.default`
45        [Event "${i}"]
46        [Site "chessbook.com"]
47        [Round "N/A"]
48        [White "N/A"]
49        [Black "N/A"]
50        [Result "*"]
51        `;a+=`
52
53`;let o=new Set,s=n.lockedMoves,c=(i,l,u)=>{let[d,...f]=jd((n.repertoires[e]?.positionResponses[i]??[]).filter(e=>!(e.mine&&lz(s,r.side,e))),e=>-(e.incidence??0)),p=new Set(u);if(p.add(i),o.add(i),!d)return;let m=[...l,d.sanPlus];a=`${a}${v1(mp.toPgn(m))} `,Kl(f,e=>{if(p.has(e.epdAfter)||t===`trim`&&o.has(e.epdAfter))return;let n=[...l,e.sanPlus],r=new Set(p);if(r.add(e.epdAfter),a+=`(`,mp.sideOfLastMove(n)===`black`){let e=Math.floor(n.length/2);a+=`${e}... ${v1(mp.toPgn(n)).trim()} `}else a+=`${v1(mp.toPgn(n))} `;c(e.epdAfter,n,r),a=a.trim(),a+=`) `}),!p.has(d.epdAfter)&&(p.add(d.epdAfter),o.add(d.epdAfter),c(d.epdAfter,m,p))};c(fp,[],new Set),a=`${a.trim()} *`;let l=document.createElement(`a`),u=`${r.name}-${new Date().toISOString()}.pgn`;if(Ye)QN.share({text:a,filename:`${u}`}).catch(e=>{console.error(`[repertoire_state] Failed to share PGN via native share:`,e)});else{let e=new Blob([a],{type:`text`}),t=window.URL.createObjectURL(e);l.download=u,l.href=t,l.style.display=`none`,document.body.appendChild(l),l.click()}},`exportPgn`)},uploadMoveAnnotation:({epd:e,san:t,text:n,repertoireId:a})=>i(([i])=>QS.post(`/api/v1/openings/move_annotation`,{text:n,epd:e,san:t,repertoireId:a}).then(({data:i})=>{r(([r])=>{let o=r.browsingState.state.activeRepertoireId;o&&r.mutatePositionReports(r=>{r[o]?.[e]?.suggestedMoves?.forEach(e=>{e.sanPlus===t&&(e.annotation=n)})}),r.moveAnnotations[dV.toKey({epd:e,san:t})]??={},r.moveAnnotations[dV.toKey({epd:e,san:t})][a??`null`]=i,r.browsingState.actions.onPositionUpdate()})})),backToOverview:()=>r(([e,t])=>{QV(e.reviewState,Q().mode),e.reviewState.handles.entireLineOnceSessionSeenEpds.clear(),t.navigationState.push(`/`),Q().clearViews(),e.backToStartPosition(),e.browsingState.actions.reset(),e.browsingState.actions.setActiveRepertoire(void 0),e.divergencePosition=void 0,e.divergenceIndex=void 0,e.needsToRefetchLichessMistakes&&e.fetchLichessMistakes(),e.needsNewModelGame&&e.modelGamesState.actions.fetchDailyModelGame()}),hasMultipleRepertoires:e=>i(([t])=>e?ru(t.repertoires,t=>

53t.side===e).length>1:Dd(t.repertoires)>2),onRepertoireUpdate:(e={})=>r(([t,n])=>{t.updateRepertoireStructures(e),n.userState.flagEnabled(`repertoire_audit`)&&t.shouldMaterializeProjection(`audit-table`,e)&&(k6().buildQueue(),k6().updateTableResponses()),t.shouldMaterializeProjection(`browsing-progress`,e)&&t.browsingState.actions.updateRepertoireProgress(),t.shouldMaterializeProjection(`active-position`,e)&&(t.browsingState.actions.fetchNeededPositionReports(),t.fetchNeededAnnotations(),t.browsingState.actions.updateTableResponses()),t.needsToRefetchLichessMistakes=!0,t.reviewState.actions.dropPausedSession(),t.updateBadge(),t.shouldMaterializeProjection(`miss-eco-codes`,e)&&t.startProcessingMissEcoCodes()}),shouldMaterializeProjection:(e,t={})=>i(([n,r])=>t.forceProjections?.includes(e)?!0:H$(V$(r),e)),updateActivePositionAfterSupplementaryLoad:()=>r(([e,t])=>{let n=V$(t);H$(n,`review-position`)?e.reviewState.actions.onPositionUpdate():H$(n,`active-position`)&&e.browsingState.actions.onPositionUpdate()}),onMoveReviewed:()=>r(([e])=>{e.updateTotalMovesDue(),e.updateBadge()}),onGameMistakeReviewed:()=>r(([e])=>{e.updateBadge()}),getAnnotation:(e,t={})=>i(([n])=>{let r=n.moveAnnotations[e];return r?t.repertoireId?r[t.repertoireId]??r.null:r.null:null}),updateBadge:()=>r(([e])=>{let t=j6().getRemainingToday(Y().totalMovesDue??0),n=(e.lichessMistakes?.length??0)+t;(async()=>{(await KN.checkPermissions()).display===`granted`&&(Ye?KN.set({count:n}).then(()=>{}).catch(e=>{}):KN.clear().catch(e=>{}))})()}),updateTotalMovesDue:()=>i(([e])=>e.totalMovesDue),fetchNeededCourses:()=>r(([e])=>{let t=new Set;Kl(e.getRepertoires(),e=>{Kl(e.positionResponses,e=>{Kl(e,e=>{e.courseId&&t.add(e.courseId)})})}),Kl(Object.keys(e.courses),e=>{t.has(e)&&t.delete(e)}),!H(t)&&hN.call([`openings.courses.overviewByIds`,{ids:Array.from(t)}]).then(t=>{Kl(t,t=>{e.courses[t.id]=t})})}),fetchNeededAnnotations:()=>i(([e,t])=>{if(m1(e))return;let n=[];Kl([e.modelGamesState.state.dailyGame,e.modelGamesState.state.activeGame],e=>{e&&(n=n.concat(mu(Pd(Yd(e.epds,e.sans),20),([e,t])=>({epd:e,san:t}))))});let i=e.reviewState.state.activeQueue,a=e.reviewState.state.currentQuizGroup;[...a?[a]:[],...i??[]].forEach(e=>{wz.getMoves(e)?.forEach(e=>{n.push({epd:e.epd,san:e.sanPlus})})});let o=e.browsingState.derived.activeRepertoire();if(Q().mode===`build`&&o){let 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consistent`,data:{name:e,moveLogLength:i.moveLog.length,moveHistoryLength:i.moveHistory.length,positionHistoryLength:i.positionHistory.length}}):Zt(t=>{t.setContext(`chessboard_history`,{name:e,moveLog:i.moveLog,moveHistory:i.moveHistory,positionHistory:i.positionHistory,forwardMoveHistory:i.forwardMoveHistory,forwardPositionHistory:i.forwardPositionHistory,attemptedMove:f,epdBeforeMove:v.epd,positionHistoryFromBoard:s.history()}),mV(!1,`moveLog and moveHistory and positionHistory are not in sync`)}));let x=new Promise(e=>{y?d.addMoveCallback(v2(dV.fromChessboardMove(v)),()=>e()):e()});return y||S2(n,i),d.getDelegate()?.onPositionUpdated?.(),d.getDelegate()?.onMovePlayed?.(),i.onPositionUpdate.call(),x}),stepAnimationQueue:e=>{o(t=>{if(t.animating)return;let n=t.animationQueue?.shift(),r=Bl(t.moveHistory);n&&(t.previewedMove=void 0,t.nextPreviewMove=void 0);let i=!1;n||(i=!0,(t.previewedMove&&t.nextPreviewMove&&!Au(t.previewedMove,t.nextPreviewMove)||t.previewedMove&&!t.nextPreviewMove)&&(Au(r,t.previewedMove)?(t.previewedMove=void 0,t.nextPreviewMove=void 0):(n=Sc(t.previewedMove),n.reverse=!0)),!t.previewedMove&&t.nextPreviewMove&&(n=t.nextPreviewMove)),(n||t.previewedMove)&&n&&(t.animating=!0,t.animatingPreview=i,d.animatePieceMove(n,e=>{o(t=>{t.animating=!1,t.animatingPreview=!1,e||(t.animationQueue=void 0)}),e&&d.stepAnimationQueue()},{firstMove:e?.firstMove,isPreview:i}))})},getIsAnimating:()=>{let e=a();return e.animating||(e.animationQueue?.length??0)>0||n.pieceLayer.isBusy()},clearPending:e=>{o(t=>{l(t,e)})},animatePieceMove:(e,t,r)=>{o(i=>{let a=r?.isPreview;a&&(e.reverse?i.previewedMove=void 0:(i.previewedMove=e,i.nextPreviewMove=e));let 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53,colorSquare:(e,t,n)=>{o(r=>{if(!e){r.coloredSquares={};return}t&&n&&(r.coloredSquares[e]={color:t,opacity:n})})},highlightSquare:e=>{o(t=>{if(!e){if(Object.keys(t.highlightedSquares).length===0)return;t.highlightedSquares={};return}Object.keys(t.highlightedSquares).length===1&&t.highlightedSquares[e]||(t.highlightedSquares=C2([e]))})},requestToMakeMove:(e,t=_2)=>{o(n=>{if(!e)return;let r=T2(e);d.clearPending();let i=d.getDelegate()?.askForPromotionPiece?.(r);if(i){let e=T2(r);e.promotion=i,r=n.position.validateMoves([e])[0]}let a=()=>{n.previewedMove?.san===r.san?d.makeMove(r,{...t,animate:!1}):d.makeMove(r,{...t})},o=d.getDelegate()?.shouldMakeMove?.(r);o&&(o===`preview`?(t.sound===`drop`&&RV(IV.drop),d.previewMove(r,{animate:t?.animate===!0})):(m2(),a(),d.getDelegate()?.madeManualMove?.()))})},clearForwardHistory:()=>{o(e=>{e.forwardMoveHistory=[],e.forwardPositionHistory=[]})},forwardOne:()=>{o(e=>{if(e.forwardPositionHistory.length>0){let t=e.forwardMoveHistory[0];d.makeMove(t,{animate:!0,sound:`move`}),d.updateMoveLogPgn(),d.getDelegate()?.onPositionUpdated?.()}})},forwardN:e=>{o(t=>{t.moveHistory.length>0&&Hd(e,()=>{d.forwardOne()})})},backN:e=>{o(t=>{t.moveHistory.length>0&&Hd(e,()=>{d.backOne()})})},backOne:e=>{o(t=>{if(t.moveHistory.length>0){let r=t.positionHistory.pop(),i=t.moveHistory.pop();hV(i,`moveHistory is empty: ${t.moveHistory}`),t.forwardMoveHistory.unshift(i),t.forwardPositionHistory.unshift(r),e?.clear&&(t.forwardPositionHistory=[],t.forwardMoveHistory=[]),e?.skipAnimation?S2(n,t):(t.animationQueue=[...t.animationQueue??[],{...i,reverse:!0}],d.stepAnimationQueue({firstMove:!0}

53),e?.callback&&d.addMoveCallback(v2(i),e.callback)),t.position.undo(),d.updateMoveLogPgn(),d.getDelegate()?.onPositionUpdated?.(),t.onPositionUpdate.call(),d.getDelegate()?.onBack?.()}})},setFrozen:e=>{o(t=>{t.frozen=e})},setPosition:e=>{o(t=>{t.position=ez(e.clone()),d.clearPending(),t.positionHistory=[h2],t.moveHistory=[],t.forwardMoveHistory=[],t.forwardPositionHistory=[],S2(n,t),d.updateMoveLogPgn(),d.getDelegate()?.onPositionUpdated?.(),t.onPositionUpdate.call(),d.getDelegate()?.onBack?.()})},resetPosition:()=>{o(e=>{e.position=ez(new ip),d.clearPending(),e.positionHistory=[h2],e.moveHistory=[],e.forwardMoveHistory=[],e.forwardPositionHistory=[],S2(n,e),d.updateMoveLogPgn(),d.getDelegate()?.onPositionUpdated?.(),e.onPositionUpdate.call(),d.getDelegate()?.onBack?.()})},visualizeMoves:(e,t,r)=>{o(t=>{t.movesToVisualize=e});let i=()=>{o(e=>{let a=e.movesToVisualize?.shift();if(e.visualizedMove=a,!a){r?.();return}let{fadeDuration:o,moveDuration:s,stayDuration:c}=a2(t),[l,u]=[a.from,a.to],{x:d,y:f}=sp(u,e.flipped),{x:p,y:m}=sp(l,e.flipped),h=n.visualizationDotRef;h&&(h.style.top=`${m*100}%`,h.style.left=`${p*100}%`,uM({autoplay:!0}).add(h,{opacity:[0,1],duration:o,ease:`linear`,offset:0}).add(h,{top:`${f*100}%`,left:`${d*100}%`,duration:s,ease:`easeInOutSine`,offset:o}).add(h,{opacity:[1,0],duration:c,ease:`linear`,offset:o+s}).then(()=>{i()}))})};i()},previewMove:(e,t)=>{o(r=>{if(e){let[i]=r.position.validateMoves([e],{sloppy:!0})??[];if(!i){hV(i,`moveObject is null`);return}let a={...i,epd:dp(r.position),sound:`move`};t?.animate===!1?(d.clearPending(),r.previewedMove=a,n.pieceLayer.playMove(b2(a),{duration:0})):(r.nextPreviewMove=a,d.stepAnimationQueue())}else r.nextPreviewMove=void 0,d.stepAnimationQueue()})},showMoveFeedback:({square:e,result:t,size:r=`small`,progress:i,keep:a},s)=>{let l;o(u=>{if(!e){c(`Chessboard feedback missing square`,u,{result:t,size:r,progress:i,keep:a}),l=()=>s?.();return}u.moveFeedback.result=t,u.moveFeedback.progress=i,u.moveFeedback.square=e,u.moveFeedback.size=r,u.moveFeedback.settled=!1;let f=n.feedbackRefs[e];if(r===`large`&&(f=n.largeFeedbackRefs[e]),t===`correct`||t===`acceptable-inaccuracy`?RV(IV.success):Kt(i)&&RV(IV.failure),t===`bonus`&&f&&sB({x:f.offsetLeft,y:f.offsetTop}),!f){l=()=>{(t!==`thinking`||a)&&d.dismissMoveFeedback({square:e,size:r},s)};return}f.style.opacity=`0`,uM({autoplay:!0,defaults:{duration:200*o2(),ease:`easeOutQuad`}}).add(f,{opacity:[0,1],scale:r===`large`?[.8,1]:[.8,1.2,1]}).then(()=>{f.style.opacity=`1`,o(t=>{t.moveFeedback.square===e&&(t.moveFeedback.settled=!0)}),(t!==`thinking`||a)&&d.dismissMoveFeedback({square:e,size:r},s)})}),l?.()},dismissMoveFeedback:({square:e,delay:t,size:r},i)=>{let a;o(s=>{if(!e){c(`Chessboard dismiss feedback missing square`,s,{delay:t,size:r}),a=()=>i?.();return}let l=n.feedbackRefs[e];if(r===`large`&&(l=n.largeFeedbackRefs[e]),!l){a=()=>i?.();return}let u=o2();rM(l,{ease:`easeInQuad`,duration:200*u,opacity:[1,0],scale:[1,.8],delay:(t??200)*u,autoplay:!0,composition:`none`}).then(()=>{l.style.opacity=`0`,o(t=>{t.moveFeedback.square===e&&(t.moveFeedback.settled=!1,t.moveFeedback.square=void 0)}),i?.()})}),a?.()},flashRing:e=>{o(t=>{t.ringColor=e?B.success:B.danger,rM(n.ringRef,{ease:`easeInOutSine`,duration:300*o2(),direction:`alternate`,opacity:[0,1],autoplay:!0})})},getLastMove:()=>Bl(a().moveHistory),makeStockfishMove:e=>o(async t=>{let n=d.getCurrentEpd(),r=new Set(e.excludedSans??[]),i=e.pv??1,a;if(i>1||r.size>0){let[o,s]=await JV(()=>G.getTopMoves(n,{pv:i,nodes:e.nodes}));if(!o||s)throw s??Error(`No stockfish moves`);let c=[...o.moves].sort((e,t)=>e.multipv-t.multipv).find(e=>!r.has(e.san));if(!c)return!1;if(!c.stockfishEval.pv)throw Error(`Stockfish move has no PV`);let[l]=t.position.validateMoves([c.stockfishEval.pv],{sloppy:!0});a=l}else{let[r,i]=await JV(()=>G.evalPos({epd:n,cb:e=>{},nodes:e.nodes}));if(!r||i)throw i??Error(`No position eval`);if(!r.pv)throw Error(`Position eval has no PV`);let[o]=t.position.validateMoves([r.pv],{sloppy:!0});a=o}if(!a)throw Error(`Stockfish PV was not a legal move`);return await MV(s2()),o(e=>{d.makeMove(a,{animate:!0,sound:`move`}).then(async()=>{})}),!0}),playLine:(e,t={})=>{o(r=>{t.animated=Kt(t.animated)?!0:t.animated,r.notifyingDelegates=!1,t?.reset&&u(r);let{reset:i,animateLine:a}=d2(r.moveLog,e);i&&u(r);let o=Bl(r.positionHistory)?.epd,s=[],c=[];for(let[n,i]of a.entries()){let o=Bl(r.positionHistory)?.epd,l=r.position.move(i,{sloppy:!0});if(!l){mV(!1,`invalid move in playLine`,{san:i,line:e,animateLine:a});break}s.push(o);let u={...l,epd:o,sound:`move`},f=dp(r.position);r.positionHistory.push({epd:f,fen:r.position.fen()}),r.moveHistory.push(u),r.moveLog.push(l.san),c.push(l),n===a.length-1&&t?.onFinished&&d.addM

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e=(e,t)=>Z(t=>e([t.cardsState.reviewState,t.cardsState,t])),t=e=>e([q().cardsState.reviewState,q().cardsState,q()]),n={originalQueue:null,viewingLastQuizPosition:!1,allReviewPositions:{},quizPositionStage:0,chessboard:void 0,reviewStats:Sc(B2),reviewSide:`white`,activeOptions:null,activeQueue:[],onSessionEnd:new AE,currentQuizPosition:null,incorrectGuessesThisQuizPosition:0,previousQuizPosition:null,markCardReviewed:t=>{hN.call([`cards.reviewCard`,{cardId:t.id,correct:t.result===`correct`}]).then(n=>{e(([e,r])=>{r.cards?.forEach(e=>{e.id===t.id&&(e.srs=n)})})})},resumeReview:()=>{e(([e,t,n])=>{Q().ensureView(I2)})},onPositionUpdate:()=>{e(([e,t])=>{})},startReview:t=>e(([e,n,r])=>{e.reviewStats=Sc(B2),e.currentQuizPosition=null,vX(`right`),e.activeOptions=t??null,e.updateQueue(t),e.allReviewPositions={},e.activeQueue.forEach(t=>{e.allReviewPositions[t.card.id]={failed:!1,reviewed:!1}}),e.originalQueue=AI(e.activeQueue),e.setupNextQuizPosition(),Q().pushView(I2)}),backToLastQuizPosition:()=>e(([e])=>{e.viewingLastQuizPosition=!0,e.activeQueue.unshift(e.currentQuizPosition),e.currentQuizPosition=e.previousQuizPosition,e.previousQuizPosition=null,e.setupCurrentQuizPosition(),e.playCorrectMove(),e.quizPositionStage=3}),setupNextQuizPosition:()=>e(([e,t,n])=>{if(e.previousQuizPosition=null,e.viewingLastQuizPosition=!1,e.chessboard.setFrozen(!1),e.currentQuizPosition&&!e.viewingLastQuizPosition){let t=e.currentQuizPosition.card;e.markCardReviewed({result:e.allReviewPositions[t.id]?.failed?`incorrect`:`correct`,id:t.id})}if(e.currentQuizPosition&&(e.previousQuizPosition=AI(e.currentQuizPosition)),e.currentQuizPosition=e.activeQueue.shift()??null,e.setupCurrentQuizPosition(),!e.currentQuizPosition){t.onCardsUpdate(),Q().cutView(),z2(`push view`),K(`review.review_complete`);return}}),setupCurrentQuizPosition:()=>e(([e,t])=>{if(e.quizPositionStage=0,e.incorrectGuessesThisQuizPosition=0,e.chessboard.setTapOptions([]),e.chessboard.setMode(`normal`),e.chessboard.highlightSquare(null),e.currentQuizPosition){if(e.reviewStats.due=e.activeQueue.length,e.reviewSide=e.currentQuizPosition.card.side,e.chessboard.setPerspective(e.reviewSide),e.chessboard.set(e=>{e.hideLastMoveHighlight=!1}),e.currentQuizPosition.card.previousEpd){let t=ez(new ip(EE.toFen(e.currentQuizPosition.card.previousEpd)));e.chessboard.setPosition(t),e.chessboard.makeMove(e.currentQuizPosition.card.san,{animate:!0,sound:`move`})}else{let t=ez(new ip(EE.toFen(e.currentQuizPosition.card.epd)));e.chessboard.setPosition(t)}e.chessboard.setPerspective(e.currentQuizPosition.card.side),e.chessboard.set(t=>{t.associatedCard=e.currentQuizPosition.card})}}),playCorrectMove:t=>{e(([e])=>{let n=e.currentQuizPosition?.card;if(!n)return;let 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