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rank(e){return e>>4}function file(e){return 7&e}function algebraic(e){return String.fromCharCode(file(e)+97)+(8-rank(e))}function swapColor(e){return 3-e}function hashNum(e,t){e[0]=(e[0]^t[0])>>>0;e[1]=(e[1]^t[1])>>>0}function wordWrap(e,t,n){return t<1?e:(t="number"==typeof t?t:80,e.replace(RegExp("(.{1,"+t+"})(?: |$|\r?\n)","g"),"$1"+n).slice(0,-n.length))}function completeFen(e){var t,n;t=[""," w - - 0 1"," - - 0 1"," - 0 1"," 0 1"," 1"][(n=(e=e.trim()).split(" ")).length];if(t&&e)e+=t;else if("0"===n[5]){n[5]=1;e=n.join(" ")}return e}function formatTimestamp(e){var t=Math.floor(e%36e3/600),n=Math.floor(e%36e3%600)/10;return Math.floor(e/36e3)+":"+(t<10?"0":"")+t+":"+(n<10?"0":"")+n}function timestampToTime(e){var t=e.split(":");return(3600*t[0]+60*t[1]+1*t[2])*10}function createVariantZobristNumbers(){t.zobristCheck=[[0x1a4cef14,0x144412b0],[0x3e08bd8c,0x128a2662],[0x60a76bdf,0x6843fe2e],[0x3c03989c,0x60e3f813],[0x74756ef3,0x17c4439],[0x99c80b2,0x735e13b1]]}function fixFenPieces(e,t){var n,a,l=e.length,d=0,f=0,m=t&&(t===c.Crazyhouse||t===c.Bughouse);for(n=0;n7){if(!m&&n8)return!1}else if("~"!==a)return!1;else if(!m||!n||!/[nbrq]/i.test(e[n-1])){e=e.substr(0,n)+e.substr(n+1);--n;--l}}else{f+=1*a;if(f>8){e=e.substr(0,n)+(a-(f-8))+e.substr(n+1);f=8}}}return e}function validateFen(e,t){var n,a,l,d,f,m,h,_,g,b,v,x,y,A,w,C,k,T,E,S,M=/^(?:[A-H]{1,2}[a-h]{0,2}|[A-H]{0,2}[a-h]{1,2}|KQ?k?q?|Qk?q?|kq?|q|-)$/,N=c[t]||1*t||c[String(t).replace(/\s/g,"").toLowerCase()],L=N===c.Crazyhouse||N===c.Bughouse,P=0,O=0,R=!0,$="",I={0:0,7:0},D={0:0,7:0},B={0:"k",7:"K"},H={0:"r",7:"R"},F=N===c.Chess960;if(!e)return 1;if(N===c.Bughouse){f=e.split(" | ");if(2===f.length)return 0===(m=validateFen(f[0],t))&&(m=validateFen(f[1],t)),m}f=e.split(/\s+/);if(N===c["3-check"]&&7===f.length){d=f.pop();if(!/^\+[0-3]\+[0-3]$/.test(d)||"+3+3"===d)return 14}if(6!==f.length)return 1;if(/\D|.{7,}|^0|^$/.test(f[5]))return 2;if(/\D|.{7,}|^0.|^$/.test(f[4]))return 3;if(!/^(?:-|[abcdefgh][36])$/.test(f[3]))return 4;b=f[2];if(F){if(!M.test(b))return 12}else if(!/^(?:KQ?k?q?|Qk?q?|kq?|q|-)$/.test(b)){if(void 0!==t||!M.test(b))return 5;F=!0}if("w"!==f[1]&&"b"!==f[1])return 6;L&&(f[0]=f[0].replace(/~(?=.*\/)/g,""));a=f[0].split("/");if(L&&9===a.length){d=a.pop();if(!/^[pnbrq]{0,63}$/i.test(d))return 13}if(8!==a.length)return 7;if("3"===f[3][1]&&"w"===f[1]||"6"===f[3][1]&&"b"===f[1])return 11;if("-"!==f[3]){h=4==(O="3"===f[3][1]?4:3)?5:2;P=f[3].charCodeAt(0)-97;R=!1;$=4===O?"P":"p"}for(n=0;n=0;--n){w=b.charCodeAt(n);if(C&&C>w&&C-w<8)return 15;if(75===w)y=I[A=7]&x[D[A]];else if(81===w)y=I[A=7]&v[D[A]];else if(107===w)y=I[A=0]&x[D[A]];else if(113===w)y=I[A=0]&v[D[A]];else{A=w>=97?0:7;y=1<64||(y&I[A])!==y||++k[A][(D[A]1)return 15}}else{_=(b.indexOf("K")>-1?128:0)|(b.indexOf("Q")>-1?1:0);if(_&&(16!==D[7]||(_&I[7])!==_))return 15;g=(b.indexOf("k")>-1?128:0)|(b.indexOf("q")>-1?1:0);if(g&&(16!==D[0]||(g&I[0])!==g))return 15}}return 0}function handToString(e,t){var n,a,l="",c=0,d=t?6:0;if(e)for(;c<5;){n=e>>ee[c]&et[c];for(a=0;a>ee[c]&et[c];for(m=0;m>>0,17*h[1]>>>0]);++c}}_=315}}function hashEP(e,n,a,l){(e[a+1]===l||e[a-1]===l)&&hashNum(n,t.zobristEnPassant[file(a)])}function getPieces(e,t){var n,a,l=[];for(n=0;n<120;++n){136&n&&(n+=8);a=e[n];if(a&&(a&t)===t){l.push(n);continue}}return l}function addPawnMove(e,t,a,l){var c;if(0===n||e[a+8]&O){if(rank(a)%7==0){c=l|ei.PROMOTION|t<t%8?1:-1;for(d=t+m;d!==f;d+=m)if(e[d])return!1;c=(l=a===v?1===m?118:114:1===m?6:2)-m;if(e[l+8]||e[l]&&l!==t&&l!==f||e[c]&&c!==t&&c!==f)return!1;if(l!==t){m=l>t?1:-1;for(d=t+m;d!==l;d+=m)if(d!==f&&e[d]||e[d+8])return!1}return!0}var ed=function(){function createLine(e,t,n,a,l,d,f){var m,h,_,g,b,y,A,w,C=[],k="",T=!0,E=t[n],S=E.length,M="";if(E.commands)for(g in E.commands)(!d||d.indexOf(g)>-1)&&(M+="[%"+g+" "+E.commands[g]+"]");E.initComment&&!f&&(M=(M+" 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":"")+m.shift();t.push(g)}),t}function createHeader(e,t){return"["+e+' "'+String(t).replace(/(\"|\\)/g,"\\$1")+'"]'}return function generatePgn2(e,t,n,a,l,d){var f,m,h="string"==typeof e.newline?e.newline:"\n",_=void 0===e.spaceAfterPeriods||e.spaceAfterPeriods,g="";g+=createHeader("Event",t.Event)+h;g+=createHeader("Site",t.Site)+h;g+=createHeader("Date",t.Date)+h;g+=createHeader("Round",t.Round)+h;if(l===c.Bughouse){g+=createHeader("WhiteA",t.WhiteA||"?")+h;g+=createHeader("BlackA",t.BlackA||"?")+h;g+=createHeader("WhiteB",t.WhiteB||"?")+h;g+=createHeader("BlackB",t.BlackB||"?")+h}else{g+=createHeader("White",t.White)+h;g+=createHeader("Black",t.Black)+h}g+=createHeader("Result",t.Result)+h;l&&(g+=createHeader("Variant",t.Variant)+h);if(t.FEN&&t.FEN!==F){g+=createHeader("SetUp","1")+h;g+=createHeader("FEN",t.FEN)+h}for(f in t)-1===ec.indexOf(f)&&(g+=createHeader(f,t[f])+h);g+=h;m=createLine(a,n,0,l,_,e.hideCommands?[]:e.restrictCommands,e.hideComments);if(l===c.Bughouse){if(d.isDependent)return m;m=makeBugHousePgn(d,m,_)}return m.push(t.Result),g+wordWrap(m.join(" "),e.maxWidth,h)}}(),eu=function(){var e="!?‼⁇⁉⁈□∇Δ∞⩲⩱\xb1∓⨀⟳→↑⇆∆⌓⇔⇗⟫⟪✕⊥⊕○⇄↻⊙☒~",t=/\[%(\S+)\s([^\]]+)\]/,n=/^(?:[+=~\/\-\u2212]+|T?N|RR|D)$/;function extractCommands(e){for(var n,a=e.commands||{};n=t.exec(e.value);){e.value=e.value.replace(n[0],"").trim();a[n[1]]=n[2];e.commands=a}}function isSplitGame(e,t,n,a){for(var l;++t0&&(v.value+=_)}}else{if("]"!==_){if(!_.trim())continue;--m}v={type:g="tags",value:""}}}for(;m-1){if("!"===_||"?"===_||6>e.indexOf(_)&&(_=["!!","??","!?","?!"][e.indexOf(_)-2])){v.value&&b.push(v);v={type:"a",value:_};("!"===d[m+1]||"?"===d[m+1])&&(v.value+=d[++m]);b.push(v);v={type:"san",value:""}}else{if("∞"===_&&"=/"===v.value){v.type="aa";v.value+=_}else{if(v.value){n.test(v.value)&&("--"!==v.value||a.rejectNullMoves)&&(v.type="aa");b.push(v)}v={type:"aa",value:_};if("↑"===_&&"↑"===d[m+1]){v.value="↻";++m}}b.push(v);v={type:"san",value:""}}}else if(" "===_||" "===_||"\r"===_||"{"===_||"("===_||")"===_){if(v.value){if("$"===v.value[0])v.type="nag";else if("*"===v.value||"1-0"===v.value||"0-1"===v.value||"1/2-1/2"===v.value||"\xbd-\xbd"===v.value){if(x||m+1-1&&extractCommands(v);b.push(v);v={type:g="san",value:""}}}}}else if(b.length){if("tags"===g){g="san";A=!1}else if("tagValueStart"!==g&&isSplitGame(l,c,f,x||"comment"===g)){"comment"===g&&b.push(v);if("tagValue"!==b[b.length-1].type){y.push(b);b=[];a.recordErrorInfo&&(b.push=y._trackTokenInfo)}g="tags";A=!0;x=0}}}}return v.value&&b.push(v),(b.length||!y.length)&&y.push(b),y}}();function Chess2(ec,ef){var ep,em,eh=0,e_=!0,eg=[],eb=v,ev=[],ex=b,ey=0,eA=1,ew=1,eC=[],ek=[eC],eT=0;eC.id=eT;var eE={},eS=[],eM=!1,eN=!1,eL=makeMoveChess,moveToSan=function(e,t){var n,a,l,c,d,f,m="";if(e&ei.KQSIDE_CASTLE)m=e&ei.KSIDE_CASTLE?"O-O":"O-O-O";else if(e&ei.DROP){l=e>>D&H;(n=e>>B)&&(m+=ea[n]);m+="@"+algebraic(l)}else{l=e>>D&H;c=em[a=e>>I&H];if(c&y){e&ei.ANY_CAPTURE&&(m+=String.fromCharCode(file(a)+97)+"x");m+=algebraic(l);e&ei.PROMOTION&&(m+="="+ea[n=e>>B])}else{m+=W[c&M];g>1&&(m+=getDisambiguator(c,a,l));e&ei.ANY_CAPTURE&&(m+="x");m+=algebraic(l)}}if(!t){if(e&ei.KQSIDE_CASTLE){a=e>>I&H;l=e>>D&H}else e&ei.DROP_OR_PROMOTE&&(c=eo[n]+eb);if(inCheckAfterMove(c,a,l,e)){eL(e,a,l,n);d=h;h=_;f=g;eh&&isVariantWin()||generateMoves()===h?m+="#":m+="+";_=h;h=d;g=f;reverseMove(eC.pop())}}return m};function hashPosition(){var e,n,a,l=eb===v?[0xf8d626aa,0xaf278509]:[0,0];for(a=0;a<120;++a){136&a&&(a+=8);(e=em[a])&&hashNum(l,t.zobristPiece[64*t.zobristPieceValueNumbers[e&M]+8*(7-rank(a))+file(a)])}if(eN){for(n=1;n<3;++n)if(ev[n]){if((ev[n]&ev[n]-1)!=0){hashNum(l,t.zobristCastle[n-1]);hashNum(l,t.zobristCastle[n+1])}else ev[n]>1<7?v:x;!(136&e);){n=em[e];if(n&l){if(n&C){if(a)return;a=e%8+(l===v?65:97)}else if(n&T)return a}e+=t}}function clear(e,t,n){em=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];eb=v;eg[v]=b;eg[x]=b;ev[v]=0;ev[x]=0;ep._hand[v]=0;ep._hand[x]=0;eS[v]=0;eS[x]=0;ex=b;ey=0;eA=1;if(!t){ek=[eC=[]];eT=0;eC.id=eT;eE={Event:"?",Site:"?",Date:"????.??.??",Round:"?",White:"?",Black:"?",Result:"*"};e?setHeader(["Variant",e]):setVariant(!1,n);n||updateSetup(generateFen())}}function reset(){clear(0,!1,!0);eC.hash=[0x463b9618,0x1691fc9c];em=[34,10,18,66,130,18,10,34,0,0,0,0,0,0,0,0,6,6,6,6,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,5,5,5,5,5,5,5,0,0,0,0,0,0,0,0,33,9,17,65,129,17,9,33,0,0,0,0,0,0,0,0];ew=1;eg[v]=116;eg[x]=4;ev[v]=48;ev[x]=48}function load(e,t,n,a){var l,m,h,_,g,A,w,k,S,M,L,P,O=0;if(a){P=(l=e.split(" "))[3];L=l[2]}else{P=(l=e.trim().split(/\s+/))[3]||"-";L=l[2]||"-"}void 0===t?(31&L.charCodeAt(0))<9&&setVariant(c.Chess960,!0):setVariant(t,!0);m=l[0];if(!a&&!(m=fixFenPieces(m,eh)))return!1;_=m.length;clear(d[eh],n,!0);if(eM){if(eh===c.Bughouse&&!ep.isDependent){A=e.split(" | ");if(!ep.siblingGame.load(1===A.length?e:A[1],t,n,a))return reset(),!1}for(g=0;g<_;++g){w=m[g];if(+w!=+w){if("/"===w){if(O>111){for(++g;g<_;++g){w=m[g];ep._hand[w<"a"?v:x]+=1<>>0}break}O+=8}else{em[O]=j[w];if("~"===m[g+1]){++g;em[O]|=N}em[O]&T&&(eg[em[O]&E]=O);++O}}else O+=1*w}}else for(g=0;g<_;++g){w=m[g];if(+w!=+w){if("/"===w)O+=8;else{em[O]=j[w];em[O]&T&&(eg[em[O]&E]=O);++O}}else O+=1*w}eb="b"===l[1]?x:v;if("-"!==L){if(eN){S={1:[0,0],2:[0,0]};for(g=L.length-1;g>=0;--g){75===(h=L.charCodeAt(g))?h=disambiguate960Rook(119,-1):81===h?h=disambiguate960Rook(112,1):107===h?h=disambiguate960Rook(7,-1):113===h&&(h=disambiguate960Rook(0,1));k=h<97?v:x;M=es[String.fromCharCode(h)];if(a||em[M]===(C|k)){h>=97?eg[k]>=1&&eg[k]<=6&&(ev[k]|=1<=113&&eg[k]<=118&&(ev[k]|=1<1||S[v][1]>1)&&(ev[v]=0);(S[x][0]>1||S[x][1]>1)&&(ev[x]=0)}else{if(!a)for(g=L.length-1;g>=0;--g){k=97>L.charCodeAt(g)?v:x;(em[es[L[g]]]!==(C|k)||eg[k]!==(k===v?116:4))&&(L=L.substr(0,g)+L.substr(g+1))}for(g=L.length-1;g>=0;--g)switch(L[g]){case"K":ev[v]|=ei.KSIDE_CASTLE;break;case"Q":ev[v]|=ei.QSIDE_CASTLE;break;case"k":ev[x]|=ei.KSIDE_CASTLE;break;case"q":ev[x]|=ei.QSIDE_CASTLE}}}!a&&(2!==P.length||eb===v&&"6"!==P[1]||eb===x&&"3"!==P[1]||em[P.charCodeAt(0)-97+(8-("3"===P[1]?4:5))*16]!==(y|swapColor(eb))||em[f[P]])&&(P="-");ex="-"===P?b:f[P];ey=1*l[4]||0;eA=1*l[5]||1;if(eh===c["3-check"]){l[6]&&"+3+3"!==l[6]&&(A=l[6].match(/^\+([0-3])\+([0-3])$/));A=A||[0,0,0];eS[v]=1*A[1];eS[x]=1*A[2]}if(!n){ew=eA;updateSetup(generateFen())}return!0}function generateStandardFen(){var e,t,n=0,a="",l="";for(e=0;e<120;++e){if(136&e){n&&(a+=n);a+="/";n=0;e+=8}t=em[e];if(t){if(n){a+=n;n=0}a+=U[t&M]}else++n}return n&&(a+=n),ev[v]&ei.KSIDE_CASTLE&&(l+="K"),ev[v]&ei.QSIDE_CASTLE&&(l+="Q"),ev[x]&ei.KSIDE_CASTLE&&(l+="k"),ev[x]&ei.QSIDE_CASTLE&&(l+="q"),a+=" "+(eb===v?"w":"b")+" "+(l||"-")+" "+(ex===b?"-":algebraic(ex))+" "+ey+" "+eA}function generateVariantFen(){var e,t,n,a=0,l="",d="";for(e=0;e<120;++e){if(136&e){a&&(l+=a);l+="/";a=0;e+=8}n=em[e];if(n){if(a){l+=a;a=0}l+=U[n&M];eM&&n&N&&(l+="~")}else++a}a&&(l+=a);eM&&(l+="/"+handToString(ep._hand[v],!0)+handToString(ep._hand[x]));if(eN){t=ev[x];e=0;for(;t;){1&t&&(d=String.fromCharCode(e+97)+d);t>>=1;++e}t=ev[v];e=0;for(;t;){1&t&&(d=String.fromCharCode(e+65)+d);t>>=1;++e}}else{ev[v]&ei.KSIDE_CASTLE&&(d+="K");ev[v]&ei.QSIDE_CASTLE&&(d+="Q");ev[x]&ei.KSIDE_CASTLE&&(d+="k");ev[x]&ei.QSIDE_CASTLE&&(d+="q")}return l+=" "+(eb===v?"w":"b")+" "+(d||"-")+" "+(ex===b?"-":algebraic(ex))+" "+ey+" "+eA,eh===c["3-check"]?l+=" +"+eS[v]+"+"+eS[x]:eh!==c.Bughouse||ep.isDependent||(l+=" | "+ep.siblingGame.fen()),l}function generateFen(){return eh?generateVariantFen():generateStandardFen()}function setHeader(e){var t,n,a;for(t=0;t-1?"Date"===n?eE[n]="????.??.??":eE[n]="?":delete eE[n]}}return eE}function updateSetup(e){if(!(eC.length>0)&&!eT){if(e!==F){eE.SetUp="1";eE.FEN=e;eC.hash=null}else{delete eE.SetUp;delete eE.FEN;eC.hash=[0x463b9618,0x1691fc9c]}}}function get(e){var t=em[f[e]];return t?{type:U[t&S|x],color:t&E,promoted:(t&N)!=0}:null}function chooseKingThreats(e,t){return eN&&ev[e]?J:!(ev[e]&ei.KSIDE_CASTLE)||em[t+1]||em[t+2]?!(ev[e]&ei.QSIDE_CASTLE)||em[t-1]||em[t-2]||em[t-3]?Z:(l=ei.QSIDE_CASTLE,Q):!(ev[e]&ei.QSIDE_CASTLE)||em[t-1]||em[t-2]||em[t-3]?(l=ei.KSIDE_CASTLE,K):(l=ei.KQSIDE_CASTLE,Y)}function calculateLegalMoveInfo(t,c){var d,f,m,h,_,g,v,x,A,w,C,k,T,E=eb,M=em;e=[];n=0;a=0;l=0;M[8]=M[9]=M[10]=M[11]=M[12]=M[13]=M[14]=M[15]=M[24]=M[25]=M[26]=M[27]=M[28]=M[29]=M[30]=M[31]=M[40]=M[41]=M[42]=M[43]=M[44]=M[45]=M[46]=M[47]=M[56]=M[57]=M[58]=M[59]=M[60]=M[61]=M[62]=M[63]=M[72]=M[73]=M[74]=M[75]=M[76]=M[77]=M[78]=M[79]=M[88]=M[89]=M[90]=M[91]=M[92]=M[93]=M[94]=M[95]=M[104]=M[105]=M[106]=M[107]=M[108]=M[109]=M[110]=M[111]=M[120]=M[121]=M[122]=M[123]=M[124]=M[125]=M[126]=M[127]=0;if(c===b){e=getPieces(em,E|t);return}k=chooseKingThreats(E,c);for(d=0;d<120;++d){136&d&&(d+=8);h=em[d];if(h){if(h&E){(!t||(0|h)&t)&&e.push(d);continue}T=k[d-c+119];if((T&h)!=0){if(h&y){A=z[h];for(f=1;f<3;++f){v=d+A[f];if(!(136&v)){M[v+8]|=P;if(v===c){++n;M[d+8]|=O}}}}else{x=(A=z[h&S]).length;C=h&L;t:for(f=0;fv)||!(w<0)||!(c-v>16))&&(!(c0)||!(v-c>16)))for(;(136&(v+=w))==0;){M[v+8]|=P;_=em[v];if(_){if(_&E){if(v===c){for(m=v-w;m!==d;m-=w)M[m+8]|=O;M[d+8]|=O;++n;C&&(136&(v+=w))==0&&(M[v+8]|=P)}else if(C&&256&T){g=v;for(;(g+=w)!==c;)if(136&g||em[g])continue t;M[v+8]|=R+(Math.abs(w)<<$);++a}}break}if(!C)break}}}}}}n>1&&(e=[c])}function validateEnPassant(e,t){var a,l,c,d=t+16*(eb===v?1:-1);return(1!==n||(em[t+8]&O)!=0||(em[d+8]&O)!=0)&&(a=em[e],em[t]=a,em[e]=0,l=em[d],em[d]=0,c=inCheck(),em[e]=a,em[t]=0,em[d]=l,!c)}function addCastlingMoves(e){var t,n,a;if(eN){if(ev[e]){n=(t=eg[e])%8;for(a=0;a<8;++a)if(ev[e]&1<n?ei.KSIDE_CASTLE:ei.QSIDE_CASTLE)+(t<>=26);for(f=0;f<5;++f)if((!t||(0|t)==1<>$==16){v=c+x[0];if(0===em[v]){addPawnMove(em,c,v,0);er[E]!==rank(c)||em[v+=x[0]]||addPawnMove(em,c,v,ei.BIG_PAWN)}}for(d=1;d<3;++d)!(136&(v=c+(w=x[d])))&&(!a||!(em[c+8]&R)||em[c+8]>>$===Math.abs(w))&&(em[v]&M?addPawnMove(em,c,v,ei.CAPTURE):v===ex&&validateEnPassant(c,v)&&(m[_++]=ei.EP_CAPTURE|c<>$,-w]}else x=z[b&S];T=c<0)return!0;break}return!0}if(h!==t&&em[h]||!_)break;h+=m}}}if(!A){f=G[t-l+119];if(f&L){m=X[t-l+119];if(m!==X[n-l+119]){h=l-m;for(;(136&h)==0;){if(h!==t){g=em[h];if(g){if(g&eb&&f&g&&g&L)return!0;break}}h-=m}}}if(a&ei.EP_CAPTURE){f=G[(x=n+16*(eb===v?1:-1))-l+119];if(f&L){m=X[x-l+119];h=l-m;for(;(136&h)==0;){if(h!==t&&h!==x){if(h===n)break;g=em[h];if(g){if(g&eb&&f&g&&g&L)return!0;break}}h-=m}}}}return!1}function attacked(e,t){var n,a,l,c,d=z[A],f=A|e;for(n=0;n<8;++n){l=t+d[n];if((136&l)==0){a=em[l];if((a&f)===f)return!0}}d=z[T];for(n=0;n<8;++n){l=t+(c=d[n]);for(;(136&l)==0;){a=em[l];if(a){if(a&e&&G[t-l+119]&a&&(!(a&y)||(e===v?t-l<0:t-l>0)))return!0;break}l+=c}}return!1}function kingAttacked(e){return eg[e]!==b&&attacked(swapColor(e),eg[e])}function inCheck(){return kingAttacked(eb)}function checkIsPotentiallyBlockable(){var e,t,n,a=16384;return ep._hand[eb]+=a,e=h,h=_,t=g,n=generateMoves()!==h,_=h,h=e,g=t,ep._hand[eb]-=a,n}function inCheckmate(){return inCheck()&&(m[0]=0)===generateMoves()&&!m[0]&&(eh!==c.Bughouse||!checkIsPotentiallyBlockable())}function inStalemate(){var e=!inCheck()&&(m[0]=0)===generateMoves()&&!m[0];return e&&eh===c.Bughouse&&!ep.isDependent&&(e=ep.siblingGame.inStalemate()),e&&eg[eb]!==b}function insufficientMaterial(e){var t,n,a=0,l=0,c=0;for(n=0;n<120;++n){136&n&&(n+=8);t=em[n];if(t){if(e&&(t&e)==0)continue;if(100&t)return!1;if(t&A){if(l||a++)return!1}else if(t&w){if(a)return!1;++l;(rank(n)+n)%2&&++c;if(c&&l!==c)return!1}}}return eg[v]!==b&&eg[x]!==b}function inThreefoldRepetition(){if(ey<8)return!1;for(var e,t=getCurrentHash(),n=!1,a=ey,l=!1,c=eC,d=c.length-1;;){d-=2;if(d<0){if(c.id){d=c.atMoveNode+d+2;c=ek[c.parentId];continue}if(-2===d)return!1;e=c.hash;l=!0}else{e=c[d].hash;c[d].halfMoves>a||a<2?l=!0:a=c[d].halfMoves}if(e[0]===t[0]&&e[1]===t[1]){if(n)return!0;n=!0}if(l)return!1}}function modifyHand(e){var n,a,l,d,f,m,h,_,g,b,x=e.move;if(eh===c.Crazyhouse||x&ei.DROP){a=ep._hand;m=e.hash;b=e.color}else{a=ep.siblingGame._hand;e.handSibling=!0;if(e_){h=ep.siblingGame._history();if(h.length)m=h[h.length-1].hash;else{h.hash||(h.hash=ep.siblingGame._hashPosition());m=h.hash}}b=swapColor(e.color)}if(e.captured){l=e.captured&N?y:e.captured&S;switch(l&S){case y:_=0;break;case A:_=1;break;case w:_=2;break;case C:_=3;break;default:_=4}n=1<>ee[_]&et[_];g=t.zobristPiece[f+63*_+(b===v?0:315)]}}else{n=-1<>B];if(e_){f=a[b]>>ee[d]&et[d];g=t.zobristPiece[f-1+63*d+(b===v?0:315)]}}a[b]+=n;e.handChange=n;e_&&hashNum(m,[31*g[0]>>>0,17*g[1]>>>0])}function makeMoveChess(e,n,a,l){var c,d,f,m,h,_,g,A,w=eb,k=swapColor(w),E={move:e,epSquare:ex,halfMoves:ey,castlingW:ev[v],castlingB:ev[x],color:w},S=w===v;if(e_){m=getCurrentHash();E.hash=m;hashNum(m,t.zobristTurn);ex!==b&&hashEP(em,m,ex+(S?16:-16),y|w)}if((e&ei.KQSIDE_CASTLE)==0){if(eM&&e&ei.DROP){em[a]=eo[l]|w;e_&&hashNum(m,t.zobristPiece[64*t.zobristPieceValueNumbers[em[a]]+8*(7-rank(a))+file(a)]);modifyHand(E);g=0}else{g=em[n];A=em[a];if(A){E.captured=A;e_&&hashNum(m,t.zobristPiece[64*t.zobristPieceValueNumbers[em[a]&M]+8*(7-rank(a))+file(a)]);if(A&C&&ev[k]){if(eN){if(rank(a)===(S?0:7)){f=1<1<1<1<>D&H,m=d>>I&H;eb=l;ev[x]=e.castlingB;ev[v]=e.castlingW;ex=e.epSquare;ey=e.halfMoves;if(eh){if(eN&&d&ei.KQSIDE_CASTLE){if(d&ei.KSIDE_CASTLE){if(l===v){n=118;t=117}else{n=6;t=5}}else if(l===v){n=114;t=115}else{n=2;t=3}em[n]=0;em[t]=0;em[m]=l|T;em[f]=l|C;eg[l]=m;return}e.handChange&&(eh!==c.Crazyhouse&&e.handSibling?ep.siblingGame._hand[swapColor(l)]-=e.handChange:ep._hand[l]-=e.handChange);if(d&ei.DROP){em[f]=0;return}e.checked&&--eS[l]}if(d&ei.PROMOTION){em[m]=y|l;d&ei.CAPTURE?em[f]=e.captured:em[f]=0}else{em[m]=em[f];if(d&ei.KQSIDE_CASTLE){em[f]=0;if(d&ei.KSIDE_CASTLE){t=f+1;n=f-1}else{t=f-2;n=f+1}em[t]=l|C;em[n]=0;eg[l]=m}else{f===eg[l]&&(eg[l]=m);if(d&ei.CAPTURE)em[f]=e.captured;else{em[f]=0;d&ei.EP_CAPTURE&&(em[f-(l===v?-16:16)]=y|a)}}}}function getDisambiguator(e,t,n){var a,l,c,d,f,h,g,b;if(_<2)return"";e&=S;for(b=0;b<_;++b){g=(a=m[b])>>D;if(n===g){d=a>>I&H;if(d!==t){l=em[d];if(l&e){c=!0;if(rank(t)===rank(d)){if(f)return algebraic(t);h=!0}if(file(t)===file(d)){if(h)return algebraic(t);f=!0}}}}}return c?f?String(8-rank(t)):String.fromCharCode(file(t)+97):""}function beautifyMove(e,t,n){var a,l,c=e>>D&H,d={color:eb,to:algebraic(c),flags:e&H};if(eM&&(e&ei.DROP)!=0){l=e>>B;d.drop=l;d.piece=eo[l]+eb}else{a=e>>I&H;d.from=algebraic(a);d.piece=em[a];if(e&ei.PROMOTION){l=e>>B;d.promotion=eo[l]+eb}e&ei.CAPTURE?d.captured=em[c]:e&ei.EP_CAPTURE&&(d.captured=y|swapColor(eb))}return t?d.san=t:d.san=moveToSan(e,n),d}function isVariantWin(){return eh===c["3-check"]?3===eS[swapColor(eb)]:eh===c["King of the Hill"]?kingOfTheHillWin(eg[swapColor(eb)]):void 0}function isBughouseWin(){if(eh===c.Bughouse)return ep.siblingGame.inCheckmate()}function isBughouseDraw(){if(eh===c.Bughouse)return ep.siblingGame.in50MoveRule()||ep.siblingGame.inThreefoldRepetition()}function createVariation(){var e=[],t=generateFen(),n=eC.length-1,a=eC[n];if(!a)return!1;e.parentId=eT;e.id=ek.length;eC.curFen=t;a.lines||(a.lines=[]);a.lines.push(e.id);if(a.move)reverseMove(a);else{ex=a.epSquare;--ey;eb=swapColor(eb)}return eb===x&&--eA,e.atMoveNode=n,n?e.hash=eC[n-1].hash:e.hash=eC.hash,eT=e.id,ek.push(e),eC=e,!0}function selectLine(e){var t=generateFen();eC.curFen=t;eC=ek[e];eT=e;load(eC.curFen,eh,!0,!0)}return ep={WHITE:v,BLACK:x,PAWN:y,KNIGHT:A,BISHOP:w,ROOK:C,QUEEN:k,KING:T,FLAGS:ei,load,reset,moves:function(e){var t,n,a,l=[],c=moveToSan;if(e){e.verbose&&(c=beautifyMove);e.type&&(n=e.type|e.type<<24);a=e.noDrop}generateMoves(n,a);for(t=0;t<_;++t)l.push(c(m[t]));return l},inCheck,inCheckmate,inStalemate,isBughouseWin,in50MoveRule:function(){return ey>=100},inDraw:function(){return ey>=100||inStalemate()||insufficientMaterial()||inThreefoldRepetition()||!!isBughouseDraw()},insufficientMaterial,inThreefoldRepetition,isVariantWin,gameOver:function(){return ep.inDraw()||inCheckmate()||!!isVariantWin()||!!isBughouseWin()},isPositionValid:function(e){var t,n,a,l=0;e=e||{};if(!1!==e.pawns){t=0;for(;t<=119;){a=em[t];if(a&y)return!1;8==++t&&(t=112)}}if(!1!==e.kings){for(t=0;t<=119;++t){136&t&&(t+=8);a=em[t];if(a&T){if(++l>2||n&&n&a)return!1;n=a&E}}if(2!==l)return!1}return!(!1!==e.check&&!(!1===e.kings&&eg[swapColor(eb)]===b)&&kingAttacked(swapColor(eb)))},validateFen,fen:generateFen,pgn:function(e){return(e=e||{}).useResultHeader||eT||(isVariantWin()||inCheckmate()?eE.Result=eb===x?"1-0":"0-1":ep.inStalemate()?eE.Result="1/2-1/2":isBughouseWin()&&(eE.Result=ep.siblingGame.turn()===v?"1-0":"0-1")),ed(e,eE,ek,ew,eh,ep)},loadPgn:function(e,t,n){var a,l,c,d,f,m,h,_,g={},b=0;if("number"!=typeof t){n=n||t;t=0}n=n||{};if("string"==typeof e){n.singleGame&&(e=e.replace(/(?:\r?\n\s*){2,}/g,"\n"));e=ep.tokenizePgn(e,n)}n.recordErrorInfo&&(_=function(e,a){var l={reason:e,token:a,lineStart:c._lineStart,colStart:c._colStart,lineEnd:c._lineEnd,colEnd:c._colEnd,pgnIndex:t};return n.errors||(n.errors=[]),n.errors.push(l),!1});t<0&&(t=e.length+t);d=e[t];if(!d)return!1;reset();l=d.length;for(a=0;a"!==c.value||n.rejectNullMoves||!f.move("--"))){_&&_("Invalid SAN move",c.value);if(n.commentErrors)m.length?m[m.length-1].comment=((m[m.length-1].comment||"")+" "+c.value).trim():m.initComment=((m.initComment||"")+" "+c.value).trim();else if(n.skipBadLines&&(0!==eT||eC.length&&n.allowBadMainLine))b=1;else{reset();return!1}}}else if("result"===c.type&&"*"===eE.Result)setHeader(["Result",c.value]);else if("a"===c.type&&0===b&&m[m.length-1])m[m.length-1].annotation=c.value;else if(("nag"===c.type||"aa"===c.type)&&0===b&&m[m.length-1]){m[m.length-1].additionalAnnotation||(m[m.length-1].additionalAnnotation=[]);-1===m[m.length-1].additionalAnnotation.indexOf(c.value)&&m[m.length-1].additionalAnnotation.push(c.value)}else if("comment"===c.type&&0===b){if(m.length){c.value&&(m[m.length-1].comment=c.value);if(c.commands){m[m.length-1].commands=c.commands;c.commands.clk?m[m.length-1].time=timestampToTime(c.commands.clk):c.commands.emt&&(c.commands.timestamp=String(timestampToTime(c.commands.emt)))}}else{m.initComment=String(c.value);c.commands&&(m.commands=c.commands)}}else if("variationStart"===c.type){if(b>0)++b;else if(!createVariation()){reset();return!!_&&_("Invalid variation start","(")}m=f._history()}else if("variationEnd"===c.type){b>0&&--b;if(0===b){selectLine(m.parentId);m=f._history()}}else if("number"===c.type){f=/b/i.test(c.value.slice(-1))?ep.siblingGame:ep;if(!f)return!!_&&_("Invalid Bughouse move number",c.value);m=f._history()}else"cont"===c.type&&eT&&!m.length&&f.move(f._lines()[m.parentId][m.atMoveNode].san)}return!0},header:function(e){return Array.isArray(e)?setHeader(e):("object"==typeof e&&Object.keys(e).forEach(function(t){setHeader([t,e[t]])}),eE)},turn:function(e){return(e===v||e===x)&&(eb=e),eb},move:function playMove(e){var t,n,a,l,c,d,h,g,b,x,A,w,C;if("string"==typeof e){l=e.length-1;switch(e[l]){case"+":case"#":e=e.substr(0,l)}b=V.indexOf(e[0])>6?q[e[0]]:"O"===e[0]?T:y;if(eM){if(-1===e.indexOf("@"))x=!0;else{x=!1;b<<=24}}generateMoves(b,x);for(l=0;l<_;++l){d=moveToSan(m[l],!0);if(e===d){n=m[l];break}}if(n){h=n>>I&H;g=n>>D&H;a=n>>B}else{if("--"===e)return makeNullMove();if(e=ep.fixMove(e))try{return playMove(e)}catch(e){}return null}}else{if(e.drop){switch(e.drop){case"p":a=0;break;case"n":a=1;break;case"b":a=2;break;case"r":a=3;break;case"q":a=4;break;default:return null}b=1<<26+a}else{if(e.promotion)switch(e.promotion){case"q":a=4;break;case"n":a=1;break;case"r":a=3;break;case"b":a=2;break;default:return null}h=f[e.from];x=!0;b=em[h]&S}t=((a?a<>I|h;generateMoves(b,x);for(l=0;l<_;++l)if(m[l]>>I===t){n=m[l];break}if(!n)return(e=ep.fixMove(e))?playMove(e):null}return C=n&ei.DROP_OR_PROMOTE?eo[a]+eb:em[h],c=beautifyMove(n,d,!0),A=inCheckAfterMove(C,h,g,n),eL(n,h,g,a),A&&(eh&&isVariantWin()||0===generateMoves()?c.san+="#":c.san+="+"),(w=eC[eC.length-1]).san=c.san,c.piece&N&&(w.promoted=!0),eb===v&&++eA,c},undo:function(e){var t=eC.pop();return t?(eb===v&&--eA,t.move)?(reverseMove(t),!!e||beautifyMove(t.move,t.san)):(ex=t.epSquare,--ey,eb=swapColor(eb),!!e||{san:"--",color:t.color}):null},clear:function(e){clear(e)},put:function(e,t,n){var a,l=f[t],c=!1,d=em[l],m=d&E,h=e.color;if(isNaN(l)||!e.type||!h||-1===V.indexOf(e.type))return!1;em[l]=q[e.type]|h|(e.promoted?N:0);em[l]&T&&(eg[h]=l);if(d&&em[eg[m]]&&em[eg[m]]!==(T|m)){for(a=0;a<120;++a){136&a&&(a+=8);if(em[a]===(T|m)){eg[m]=a;c=!0}}c||(eg[m]=b)}return n||load(generateFen(),eh,!1,!1),!0},get,remove:function(e,t){var n,a=em[f[e]],l=get(e),c=a&E;em[f[e]]=0;if(a&T){eg[c]=b;ev[c]=0;for(n=0;n<120;++n){136&n&&(n+=8);if(em[n]===(T|c)){eg[a.color]=n;break}}}return t||load(generateFen(),eh,!0,!1),l},history:function(e,t){for(var n,a=[],l=eC,c=l.length;;){if(-1==--c){if(l.id&&!t){c=l.atMoveNode;l=ek[l.parentId];continue}break}if(e){(n=beautifyMove(l[c].move,l[c].san)).color=l[c].color;!c&&l.initComment&&(n.firstComment=l.initComment);void 0!==l[c].comment&&(n.comment=l[c].comment);void 0!==l[c].time&&(n.time=l[c].time);void 0!==l[c].annotation&&(n.annotation=l[c].annotation);void 0!==l[c].additionalAnnotation&&(n.additionalAnnotation=l[c].additionalAnnotation);void 0!==l[c].commands&&(n.commands=l[c].commands);void 0!==l[c].captured&&(n.captured=l[c].captured);void 0!==l[c].promoted&&(n.promoted=l[c].promoted);void 0!==l[c].lines&&(n.lines=l[c].lines);void 0!==l[c].bughouseOrder&&(n.bughouseOrder=l[c].bughouseOrder);V.indexOf(l[c].san[0])>6?n.piece=q[l[c].san[0]]:"O"===l[c].san[0]?n.piece=T:n.piece=y;n.piece|=n.color;a.unshift(n)}else a.unshift(l[c].san)}return a},hashes:function(){for(var e=[],t=eC,n=t.length;;){if(-1==--n){if(t.id){n=t.atMoveNode;t=ek[t.parentId];continue}t.hash||getCurrentHash();e.unshift(t.hash);break}e.unshift(t[n].hash)}return e},moveCount:function(){return eC.length},startingMoveNumber:function(){return ew},completeFen,createVariation,selectLine,hash:function(){var e=getCurrentHash();return eh!==c.Bughouse||ep.isDependent?e:[e,ep.siblingGame.hash()]},hashing:function(e){e_=e;eh!==c.Bughouse||ep.isDependent||ep.siblingGame.hashing(e_)},hand:function(){if(eM)return handToString(ep._hand[v],!0)+handToString(ep._hand[x])},checks:function(){if(eh===c["3-check"])return[eS[v],eS[x]]},threats:function(){var e,t,l,c,d,f,g,v=eb,x=swapColor(v),y=[],A=[],w=[],C=[],k=[],T=ex;calculateLegalMoveInfo(0,eg[v]);if(n||a)for(e=0;e<120;++e){136&e&&(e+=8);em[e+8]&O&&em[e]?w.push(algebraic(e)):em[e+8]&R&&y.push(algebraic(e))}eb=x;ex=b;generateMoves();for(e=_;e--;){d=(t=m[e])>>D&H;f=t>>I&H;if(t&ei.DROP_OR_PROMOTE){c=eo[g=t>>B]|x;if(t&ei.PROMOTION&&g%3!=1)continue}else{c=em[f];g=0}if(inCheckAfterMove(c,f,d,t)){eL(t,f,d,g);h=e;(eh&&isVariantWin()||generateMoves()===e)&&A.push((t&ei.DROP?U[c].toLowerCase()+"@":algebraic(f))+algebraic(d));reverseMove(eC.pop());if(t&ei.CAPTURE){l=0;for(e=_;e>h;)if((m[--e]>>D&H)===d){l=1;e=h;break}if(!l){C.push(algebraic(f)+algebraic(d));continue}}}t&ei.CAPTURE&&1!==g&&(l=124&em[d])&&(attacked(v,d)?l>(c=em[f]&S)&&l-c!=8&&k.push(algebraic(f)+algebraic(d)):C.push(algebraic(f)+algebraic(d)))}return h=0,eb=v,ex=T,{pins:y,checkers:w,mates:A,undefended:C,underdefended:k}},tokenizePgn:eu,fixMove:function(e){var t,n,a;if("string"==typeof e){if(/0|[?!+#]$|[18][QNRB]$|^P/i.test(e))return e.replace(/[?!+#]+$/,"").replace(/0/g,"O").replace(/([18])([QNRB])$/i,"$1=$2").replace(/^P+/i,"");n=e.indexOf("=")>0?-4:-2;t=f[e.substr(n,2)];if("number"==typeof t){if(em[t]&swapColor(eb)||/^[a-h]x?[a-h][36]$/.test(e)){if(-1===e.indexOf("x"))return e.slice(0,n)+"x"+e.substr(n)}else if(e.indexOf("x")>-1)return e.replace(/x/g,"");if(a=e.match(/^([KQNRB]?)([a-h][1-8]?|[1-8])x?([a-h][1-8])=?(.?)$/)){if(em[f[a[2]]])return{from:a[2],to:a[3],promotion:a[4].toLowerCase()};if(/^\d$/.test(a[2])){e=0;generateMoves(q[a[1]],!0);for(n=0;n<_;++n)if(m[n]>>D===t&&rank(m[n]>>I&H)===8-a[2]){if(e)return;e=m[n]}if(e)return moveToSan(e,!0)}return a[1]+a[3]+a[4]}}}else if(em[f[e.from]]===(T|eb)&&e.to&&e.from[1]===e.to[1]){if(e.frome.to)return"O-O-O"}},_hand:[],_history:function(e){return e&&(eT=(eC=e).id),eC},_lines:function(){return ek},_hashPosition:hashPosition,_board:function(){return em}},ec&&load(ec,ef)||reset(),ep}return 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n=e.data;(m.onSpecialMessage||m.onCustomMessage)(n);if("quit"===n){m=null;t=!0;window.removeEventListener("beforeunload",onBeforeunload)}};m.addMessageListener(c.postMessage)}).catch(function(e){n=null;t=!0;l.onerror(e)})}),l.postMessage=function(e){n.push(e);runAsync(function(){flushMessages(c,n)})},c.postMessage=function(e){a.push(e);runAsync(function(){flushMessages(l,a)})},l.terminate=function(){},l}function requeue(e,t){var n=t.concat();t.length=0;n.forEach(function onEachCmd(t){if(t.cmd)"go"!==t.cmd.substr(0,2)&&e.send(t.cmd,t.cb,t.stream);else{clearTimeout(t.timer);e.getBestMove(t.args,t.cb,t.stream)}})}function createWebWorker(e,t,n){var a=e&&e.loader?e.loader+(e.engine?"#"+e.engine:""):"stockfish.js",l=t.useFakeWorker&&t.useFakeWorker[a.replace(/[?#].*$/,"")]?fakeWorker(a):new Worker(a),c={terminate,postMessage};function postMessage(e){l.postMessage(e)}function terminate(){l.terminate()}return l.onmessage=function(e){"string"==typeof e.data&&c.onmessage(e.data)},l.onerror=function(e){var a,d=!0;n.availableEngines.shift();if(n.availableEngines.length){d=!1;try{e.preventDefault()}catch(e){}try{l.terminate()}catch(e){}(a=createWebWorker(n.availableEngines[0],t,n))._origWorker=c._origWorker||c;a.onmessage=function(e){a._origWorker.onmessage(e)};a._origWorker.postMessage=a.postMessage;a._origWorker.terminate=a.terminate;requeue(n,n._activeCommands());requeue(n,n._bestMoveQueue())}t.onError&&t.onError(e,d);d&&n.quit()},c}function getAvailableEngines(t){var n=[];if(t.engines){t.engines.multiThreaded&&e.supportsMultithreading()&&e.supportsSIMD()&&n.push(t.engines.multiThreaded);t.engines.multiThreadedNoSIMD&&e.supportsMultithreading()&&n.push(t.engines.multiThreadedNoSIMD);t.engines.singleThreaded&&n.push(t.engines.singleThreaded);t.engines.asm&&n.push({loader:t.engines.asm})}return(t.enginePath||t.pathToEngineWorker)&&n.push({loader:t.enginePath||t.pathToEngineWorker,engine:t.pathToWasmEngine}),(t.fallbackPath||t.pathToNonWasmEngine)&&n.push({loader:t.fallbackPath||t.pathToNonWasmEngine}),n}function createWorker(e,t){return t.availableEngines=getAvailableEngines(e),createWebWorker(t.availableEngines[0],e,t)}function parseSearchLine(e){for(var t,n,a=e.split(" "),l=a.length,c="info"===a[0]?1:0,f={mtype:a[0]};c=0?"fetch":"bestmove"===d||"info"===d?"go":"other";c=t.length;for(l=0;l-1){l=t.split("\n");for(c=0;c=0;--n)if(C[e][n].func===t){C[e][n].removed=!0;C[e].splice(n,1);return}}};b.emit=function(e,t){var n,a,l,c,d;if(C[e]){c=(l=C[e].slice(0)).length;for(n=0;n-1){if(!t[e]||!t[e].length)return;Array.isArray(t[e])&&(t[e]=t[e].join(" "))}d.push(e);-1===c.indexOf(e)&&d.push(t[e])}});b.send(d.join(" "),n,a)}});b.setoption=function(e,t){b.send("setoption name "+e+" value "+t)};b.setVariant=function(e){var t;if(e!==g){t=String(e).toLowerCase().replace(/ |-/g,"");if(e&&"chess"!==t){if("chess960"===t){b.setoption("UCI_Variant","chess");b.setoption("UCI_Chess960","true")}else{"threecheck"===t&&(t="3check");b.setoption("UCI_Variant",t);b.setoption("UCI_Chess960","false")}}else{t=void 0;b.setoption("UCI_Variant","chess");b.setoption("UCI_Chess960","false")}g=t}};b.loadBook=function(e,n){b.pathToBook=e;t.loadBook(e,function onload(e,t){if(e){console.error("Error loading opening book.");console.error(e);b.pathToBook=null;b.bookLoaded=!1}else{b.book=t;b.rawBook=t.json;b.bookLoaded=!0}n()})};b.getBookMove=function(t){var n=e.createGame(t),a=b.book.pick({fen:n.fen(),type:void 0!==t.bookPick?t.bookPick:"random",chess960:"Chess960"===n.header().Variant}),l=a&&n.move(a);if(l)return{moveSan:l.san,moveLan:a,move:{from:l.from,to:l.to,promotion:l.promotion||null},baseTurn:1===n.turn()?"b":"w",pv:[{moveSan:l.san,moveLan:a}],depth:null,score:null,mateIn:null,isBookMove:!0}};function getCEE(t,n){var a=t.loader,l=A[a]=A[a]||[],c=w[a]=w[a]||[];return t.maxEngines&&(n%=t.maxEngines),l[n]&&void 0!==l[n].ready||(l[n]=e({enginePath:a,pathToWasmEngine:t.engine,ceeMode:!0})),clearTimeout(c[n]),c[n]=setTimeout(function(){try{l[n].quit()}catch(e){}l[n]=null},t.killDelay||1e4),l[n]}function classifyStream(n,a,l,c,d,f){var m,h=[],_=[],g=a.minDepth||14,v=[],x=[];function getClassification(d,f,h){var _={cp:f[d].cp,mateIn:f[d].mateIn,pv:f[d].pv.slice(1)},g=getCEE(a,d),y={moveLan:f[d].pv[0]},A=a.book||b.rawBook;function streamCEEData(e){v[d]=!1;if(!m&&b.ready){e.mtype="classification";e.depth=h;e.multipv=d+1;n(e);x[d]&&getClassification(d,x[d].evals,x[d].depth)}}if(v[d]){x[d]={evals:f,depth:h};return}A&&(y.isBook=!!A[t.to64BitHex(e.createGame({fen:l,moves:y.moveLan,variant:c}).hash())]);v[d]=!0;x[d]=null;g.fetch({action:"analysis",variant:c,startFen:l,moves:[y],evals:[f,[_]],options:{WhiteElo:a.whiteElo,BlackElo:a.blackElo,ScoreWhiteToMove:!0}},function onDone(e){streamCEEData(e.positions[1])},function onError(e){e||(e={});e.err=!0;streamCEEData(e);g.quit()})}return function stream(e){var t;if("bestmove"===e.mtype)m=!0;else if(e.depth>=g){t=e.multipv-1;if("info"===e.mtype&&e.pv&&e.multipv>0&&(e.pv.length>1||1===e.mate)&&_[t]!==e.depth){h[t]=e;_[t]=e.depth;if(t<=1&&_[0]===_[1]){getClassification(0,h,e.depth);f||getClassification(1,h,e.depth)}else(d||_[0]===_[1])&&getClassification(t,h,e.depth)}}f&&e.multipv&&(1!==e.multipv||!n)||n(e)}}function bestMoveSearch(){var t,n,a,l,c,d=1,f=[],m=[],h=null,g=x[0].args,v=x[0].cb,y=x[0].stream,A=1,w=[],C=14,k=loadEngine._previousCP;x[0].started=!0;loadEngine._previousCP=null;function convertpv(e){var t=[],n=m[e]||createSanPv(f[e]);return f[e].forEach(function oneach(e,a){t.push({moveSan:n[a],moveLan:e})}),t}function getpv(e,t,n,a){var l;for(l=f.length-1;l>=0;l-=1)if(f[l][0]===e)return convertpv(l);return n?[{moveSan:t,moveLan:e},{moveSan:a,moveLan:n}]:t?[{moveSan:t,moveLan:e}]:[]}function normalize(e){var t=.03*Math.pow(32,e.depth/C);e.cp=k+(e.cp-k)*t}function convertScore(e){if(0===e.mate){e.mateIn=0;e.cp=-31800*A}else{e.mateIn=Number(e.mate*A)||null;if("number"!=typeof e.mateIn||isNaN(e.mateIn)||"number"==typeof e.cp){e.cp*=A;9===Math.abs(e.cp)&&(e.cp=0);g.normalize&&e.depth<=C&&"number"==typeof k&&1===e.multipv&&normalize(e)}else e.cp=31800*A*(e.mate/Math.abs(e.mate))}e.score=e.cp/100}function returnBestMove(e){var n=parseSearchLine(e);addBestMoveProps(n);d>C&&t<5e3&&t>-5e3&&(loadEngine._previousCP=t);n.pv=getpv(n.moveLan,n.moveSan);1===n.pv.length&&n.ponder&&(n.pv=getpv(n.moveLan,n.moveSan,n.ponder,n.ponderSan));if(w.length>1){w.splice(w.indexOf(n.moveLan),1);g.searchmoves=w;g.getNextBest=0;queueBestMoveSearch(g,function done(){v(n)},function streamer(e){if(y){e.multipv=2;y(e)}})}else if(v)try{v(n)}catch(e){console.error(e)}x.shift();clearTimeout(_);x.length>0&&bestMoveSearch()}function addBestMoveProps(c){var f;c.baseTurn=a;void 0===t&&(l.inCheckmate()?streamInfo("info depth 0 score mate 0"):l.inStalemate()&&streamInfo("info depth 0 score cp 0"));c.cp=t;c.score=t/100;c.mate=n;c.mateIn=h;c.depth=d;c.moveLan=c.bestmove;if(c.moveLan){c.move=e.uciToObj(c.moveLan)[0];f=l.move(c.move);if(f){c.moveSan=c.bestmoveSan=f.san;if(c.ponder){f=l.move(e.uciToObj(c.ponder)[0]);if(f){c.ponderSan=f.san;l.undo(!0)}}l.undo(!0)}}}function createSanPv(t){var n,a,c=t.length,d=[];for(n=0;n0;--n)l.undo(!0);return d}function streamInfo(e){var l=parseSearchLine(e);if(l.score){l.baseTurn=a;convertScore(l);!l.multipv&&l.depth&&(l.multipv=1);if(1===l.multipv||0===l.depth){t=l.cp;n=l.mate;h=l.mateIn}}l.pv&&y&&(l.pvSan=createSanPv(l.pv));if(l.pv&&!(l.lowerbound||l.upperbound)){f.push(l.pv);y&&m.push(l.pvSan)}l.depth>d?d=l.depth:"bestmove"===l.mtype&&addBestMoveProps(l);y&&!(0===l.mateIn&&l.pv)&&y(l);createTimeout()}function createTimeout(){if(g.timeout){clearTimeout(_);x[0].timer=_=setTimeout(function(){b.stop();if(v){v();v=void 0}},g.timeout)}}if(g.difficulty>=0&&g.difficulty<20){b.setoption("Skill Level",g.difficulty);g.maximumError>=0&&g.maximumError<=4999&&b.setoption("Skill Level Maximum Error",g.maximumError);g.errorProbability>=1&&g.errorProbability<=128&&b.setoption("Skill Level Probability",g.errorProbability)}else b.setoption("Skill Level",20);void 0!==g.contempt?b.setoption("Contempt",g.contempt):b.setoption("Contempt","0");g.multiPv>1?b.setoption("MultiPV",g.multiPv):b.setoption("MultiPV",1);if(!g.movetime&&(!g.wtime||!g.btime)&&!g.depth&&!g.infinite){g.btime=g.btime||72e3;g.wtime=g.wtime||72e3}if(!g.startpos&&g.fen||g.moves||g.variant){l=e.createGame({fen:g.fen?convertStandardVariantFen(g.fen):"rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",moves:g.moves,variant:g.variant,disableHashing:!0});if(l.turn()===l.WHITE)a="w";else{a="b";A=-1}}else{a="w";l=e.createGame({disableHashing:!0})}if(g.cee&&y){if(2>(Number(g.multiPv)||1)){c=!0;b.setoption("MultiPV",2)}y=classifyStream(y,g.cee,l.fen(),g.variant,1===l.moves().length,c)}b.setVariant(g.variant);b.position(g);b.go(g,returnBestMove,streamInfo);g.getNextBest&&v&&l.moves({verbose:!0}).forEach(function toLan(t){t=e.normalizeMoveObj(t);w.push(t.from+t.to+(t.promotion||""))});createTimeout()}function queueBestMoveSearch(e,t,n){x.push({args:e,cb:t,stream:n});1===x.length&&b.ready&&bestMoveSearch()}b.getBestMove=function(e,t,n){var a;(e=e||{}).fen=e.fen||e.baseFen;e.is960&&(e.variant="Chess960");if(b.bookLoaded&&e.useBook){a=b.getBookMove(e);if(a)return setTimeout(function(){a.mtype="bestmove";t(a)},0)}queueBestMoveSearch(e,t,n)};b.stopAll=function(t){var n,a=v.length,l=0;function ondiscard(){0==(l-=1)&&t()}x=[];for(n=0;n=0?handleError({msg:"CEE crashed with error code",code:e.ERROR_CODES.ERROR,log:n.match(/info string CEEError\s*(.*)/)[1],err:Error(n.match(/info string CEEError\s*(.*)/)[1])}):t.ceeDebug&&n.indexOf("not recognized")>=0&&handleError({msg:"CEE received unknown UCI option (engine.ceeDebug mode on)",option:n,code:e.ERROR_CODES.NONFATAL_ERROR,err:Error(n)})})}t.fetch=function(n,a,l){var c,d;c=(n=n||[]).action||"analysis";if(Array.isArray(n))d=n;else{d=n.uciCommands?n.uciCommands.map(function(e){return e}):[];if(n.startFen){n.options=n.options||{};void 0===n.options.ScoreWhiteToMove&&(n.options.ScoreWhiteToMove=!0);void 0===n.options.SerializeLikeCEAC&&(n.options.SerializeLikeCEAC=!0);e.CEE_LIB.addOptions(d,n.options);e.CEE_LIB.addVariant(d,n.variant);e.CEE_LIB.addPosition(d,n.startFen)}e.CEE_LIB.addVariations(d,n.evals&&n.evals[0]);e.CEE_LIB.addVariations(d,n.threats&&n.threats[0],"threat-variation");(n.moves||[]).forEach(function(t,a){var l=a+1;e.CEE_LIB.addPush(d,t);e.CEE_LIB.addClock(d,n.clocks&&n.clocks[a]);e.CEE_LIB.addVariations(d,n.evals&&n.evals[l]);e.CEE_LIB.addVariations(d,n.threats&&n.threats[l],"threat-variation")})}if(t.ready)analyze(d,c,a,l);else{t.once("quit",l);t.isready(function onReady(){t.off("quit",l);analyze(d,c,a,l)})}};t.fetch.setTimeout=function(e){c=e};e.ERROR_CODES={TIMEOUT:1,CRASH:2,ERROR:3,NONFATAL_ERROR:4}}return loadEngine},a=function(){var e,a=n(),l="rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",c=252,d={4:"p",5:"P",6:"p",8:"n",9:"N",10:"n",16:"b",17:"B",18:"b",32:"r",33:"R",34:"r",64:"q",65:"Q",66:"q",128:"k",129:"K",130:"k"},f=512,m="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!?{~}(^)[_]@#$,./&-*++=",h="qnrbkp";function decodeTCN(e){var t,n,a,l,c=e.length,d=[];for(t=0;t63){l.promotion=h[Math.floor((a-64)/3)];a=n+(n<16?-8:8)+(a-1)%3-1}n>75?l.drop=h[n-79]:l.from=m[n%8]+(Math.floor(n/8)+1);l.to=m[a%8]+(Math.floor(a/8)+1);d.push(l)}return d}function encodeTCN(e){var t,n,a,l,c="";Array.isArray(e)||(e=[e]);n=e.length;for(t=0;t=0;--n){l=h[n];if(isSameMove(l,t)){c=!0;break}}if(c){if(l.drop)e.put({type:l.drop,color:_},l.to);else{d=e.remove(l.from,!0);if(l.flags===a.FLAGS.KSIDE_CASTLE){f=e.remove("Chess960"===m?l.to:"h"+l.from[1],!0);e.put(d,"g"+l.from[1],!0);e.put(f,"f"+l.from[1])}else if(l.flags===a.FLAGS.QSIDE_CASTLE){f=e.remove("Chess960"===m?l.to:"a"+l.from[1],!0);e.put(d,"c"+l.from[1],!0);e.put(f,"d"+l.from[1])}else{if(l.promotion){d.type=l.promotion;d.promoted=!0}f=e.get(l.to);e.put(d,l.to,"k"!==d.type&&"r"!==d.type&&(!f||f.color!==_||"r"!==f.type))}}return l}if(t.from){e.turn(_);t=e.fixMove(t);e.turn(3-_);if(t)return makePremove(e,{san:t,from:t.from})}}function getPieces(e,t){var n,a,l,h=t?{}:[],_=e._board();if(t)for(n=112;n>=0;++n){136&n&&(n-=24);(a=_[n])&&(h[l=m[7&n]+(8-(n>>4))]={type:d[a&c],color:3&a,promoted:(a&f)!=0,square:l})}else for(n=112;n>=0;++n){136&n&&(n-=24);(a=_[n])&&h.push({type:d[a&c],color:3&a,promoted:(a&f)!=0,rank:8-(n>>4),file:(7&n)+1})}return h}function predict(e,t){var n=Math.min(Math.max(.20773843*Math.atan(2.49085889*e/100-2.47841945*t/100)+.02262979*e/100-.02256839*t/100+.52239679,0),1),a=Math.min(Math.max(-.20720905*Math.atan(2.49626837*e/100-2.48220286*t/100)+-.02352551*e/100+.02172627*t/100+.49443923,0),1),l=Math.min(Math.max(Math.exp(.037043456*e/100+.178106427*t/100+-8.069742932)+.004823544*Math.exp(-1.364136591*Math.pow(e/100-t/100,2))+-.001625539,0),1),c=n+a+l;return{w:n/c,b:a/c,d:l/c}}function getPositionDetails(e,t){var n,a,l,c;(e=e||{}).disableHashing=!0;n=createGame(e);if(!n)return null;if(t){l=n.move(t);if(!l)return null;n.extended||normalizeMoveObj(l)}return(c=n.fen(),e.skipValidation||n.isPositionValid(e))?(a=c.split(" "),{fen:c,pieces:getPieces(n),sideToMove:n.turn(),castling:a[2],epSquare:"-"===a[3]?null:a[3],halfMoves:+a[4],moveNumber:+a[5],move:l,hand:n.hand(),checks:n.checks()}):null}function gameFingerprints(e){var n,a,c,d,f,m,h,_,g,b=createGame(e),v=[""],x=[];if(!b)return!1;g=(_=b.header()).Variant||"";m=b.hashes();n="function"==typeof b.origHistory?b.origHistory(!0):b.history(!0);f=m.length;a=[m[0][0],m[0][1]];x.push(t.to64BitHex(a)+g);m[0]=t.to64BitHex(m[0]);for(c=1;c>>0;a[1]=(a[1]^m[c][1]*(c+984))>>>0;m[c]=t.to64BitHex(m[c]);x.push(t.to64BitHex(a)+g);normalizeMoveObj(n[d=c-1]);h=(n[d].from?n[d].from:n[d].drop.toUpperCase()+"@")+n[d].to+(n[d].promotion||"");d&&(h=v[d]+" "+h);v.push(h)}return{startingFen:_.FEN||l,hashes:m,fingerprints:x,moves:v,variant:_.Variant}}function makeMoves(e,t,n,a){var l,c,d,f,m,h,_,g,b,v,x;n=n||{};"string"==typeof t&&(t=t.trim().split(" "));d=t.length;for(l=0;l)+$/.test(h.to||t[l]))m.move("--");else if(n.autoPromote){!0===n.autoPromote?h.promotion="q":h.promotion=n.autoPromote;if(!m.move(h)){if(n.skipBadLines)break;return!1}}else{if(n.skipBadLines)break;return!1}}g=(_=m._history())[_.length-1];a&&(b=parseInt(a[l],10));("number"!=typeof b||isNaN(b))&&(b=parseInt(t[l].time,10));if("number"==typeof b&&!isNaN(b)){g.time=b;b=void 0}t[l].firstComment&&(_.initComment=t[l].firstComment);t[l].comment&&(g.comment=t[l].comment);t[l].annotation&&(g.annotation=t[l].annotation);t[l].additionalAnnotation&&(g.additionalAnnotation=t[l].additionalAnnotation);t[l].commands&&(g.commands=t[l].commands);if(t[l].lines){f=t[l].lines.length;for(c=0;c=0;--t){if(1===l[t].color){n=c.white;a=c.black}else{n=c.black;a=c.white}a[l[t].type]&&--a[l[t].type];n.count+=d[l[t].type]}return c.imbalance=c.white.count-c.black.count,c};e.origHistory=e.history;e.history=function(t,n){var a,l,c,d=[],f=e._history(),m=f.length,h=e._lines();"boolean"==typeof t&&(t={verbose:t});t=t||{};n&&(t.noParentLines=n);t.toCurrent&&(m=e.ids().move+1);for(;;){if(-1==--m){if(f.id&&!t.noParentLines){m=f.atMoveNode;f=h[f.parentId];continue}break}if(t.verbose){a={};for(l in f[m])if(f[m][l]&&"object"==typeof f[m][l]){a[l]=f[m][l].constructor===Array?[]:{};for(c in f[m][l])a[l][c]=f[m][l][c]}else a[l]=f[m][l];d.unshift(a)}else d.unshift(f[m].san)}return d};e._getPos=function(n,a,c){var m,h,_;return("number"!=typeof n&&(n=d),"number"!=typeof a&&(a=f),m=(h=e._lines())[a],n>=0)?m[n]:c?m:m.id?m.atMoveNode?h[m.parentId][m.atMoveNode-1]:e._getPos(m.atMoveNode-1,m.parentId):(_={fen:t.header().FEN||l,hash:m.hash,initial:!0,ids:{move:-1,line:0},moveNumber:-1},e.siblingGame&&(_.bughouseOrder=-1),_)};e.move=function(t,n){var a,l,c,m,h=e._history();if(t&&("string"==typeof t||t.to&&(t.from||t.drop))){if(f===h.id&&d0;--t)if(!a[t].length){a[t]=void 0;n=!0}n&&e.reorderLines()};e.loadPgn=function(n,a,l){var c=t.loadPgn(n,a,l),m=e._history();return e.removeEmptyLines(),d=m.length-1,(f=m.id)&&e.selectLine(0),c};e.ids=function(){return{move:d,line:f}};e.selectLine=function(t){e.selectPosition(null,t)};e.curBughouseMove=function(){return Math.max(e._getPos().bughouseOrder,e.siblingGame._getPos().bughouseOrder)};e.deleteBughouseMove=function(t){var 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|Trident\//.test(t._navigator&&t._navigator.userAgent)||(e.src="data:audio/wav;base64,UklGRigAAABXQVZFZm10IBIAAAABAAEARKwAAIhYAQACABAAAABkYXRhAgAAAAEA")}};var Sound3=function(e){this._parent=e;this.init()};Sound3.prototype={init:function(){var e=this,n=e._parent;return e._muted=n._muted,e._loop=n._loop,e._volume=n._volume,e._rate=n._rate,e._seek=0,e._paused=!0,e._ended=!0,e._sprite="__default",e._id=++t._counter,n._sounds.push(e),e.create(),e},create:function(){var e=this,n=e._parent,a=t._muted||e._muted||e._parent._muted?0:e._volume;if(n._webAudio){e._node=void 0===t.ctx.createGain?t.ctx.createGainNode():t.ctx.createGain();e._node.gain.setValueAtTime(a,t.ctx.currentTime);e._node.paused=!0;e._node.connect(t.masterGain)}else 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e=this,n=e._parent;n._duration=Math.ceil(10*e._node.duration)/10;0===Object.keys(n._sprite).length&&(n._sprite={__default:[0,1e3*n._duration]});if("loaded"!==n._state){n._state="loaded";n._emit("load");n._loadQueue()}e._node.removeEventListener(t._canPlayEvent,e._loadFn,!1)},_endListener:function(){var e=this,t=e._parent;if(t._duration===1/0){t._duration=Math.ceil(10*e._node.duration)/10;t._sprite.__default[1]===1/0&&(t._sprite.__default[1]=1e3*t._duration);t._ended(e)}e._node.removeEventListener("ended",e._endFn,!1)}};var n={},loadBuffer=function(e){var t=e._src;if(n[t]){e._duration=n[t].duration;loadSound2(e);return}if(/^data:[^;]+;base64,/.test(t)){for(var a=atob(t.split(",")[1]),l=new Uint8Array(a.length),c=0;c0){n[a._src]=e;loadSound2(a,e)}else error2()};"undefined"!=typeof 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