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f=y(o,d.whitePov(e),n);e.draggable.current={orig:o,origPos:h.key2pos(o),piece:i,rel:r,epos:r,pos:[0,0],dec:e.draggable.centerPiece?[r[0]-(f.left+f.width/2),r[1]-(f.top+f.height/2)]:[0,0],started:e.draggable.autoDistance&&e.stats.dragged,element:l,previouslySelected:a,originTarget:t.target},l.cgDragging=!0,l.classList.add("dragging");var p=e.dom.elements.ghost;p&&(p.className="ghost ".concat(i.color," ").concat(i.role),h.translateAbs(p,h.posToTranslateAbs(n)(h.key2pos(o),d.whitePov(e))),h.setVisible(p,!0)),b(e)}else s&&d.unsetPremove(e),u&&d.unsetPredrop(e);e.dom.redraw()}}},n.pieceCloseTo=m,n.dragNewPiece=function(e,t,n,r){var o="a0";e.pieces.a0=t,e.dom.redraw();var i=h.eventPosition(n),a=d.whitePov(e),s=e.dom.bounds(),u=y(o,a,s),c=[(a?0:7)*u.width+s.left,(a?8:-1)*u.height+s.top];e.draggable.current={orig:o,origPos:h.key2pos(o),piece:t,rel:c,epos:i,pos:[i[0]-c[0],i[1]-c[1]],dec:[-u.width/2,-u.height/2],started:!0,element:function(){return 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a[(e.shiftKey&&i.isRightButton(e)?1:0)+(e.altKey?2:0)]}(t)},s(e))}},n.processDraw=s,n.move=function(e,t){e.drawable.current&&(e.drawable.current.pos=i.eventPosition(t))},n.end=function(e){var t=e.drawable.current;t&&(t.mouseSq&&function(e,t){var n=function(e){return e.orig===t.orig&&e.dest===t.dest},r=e.shapes.filter(n)[0];r&&(e.shapes=e.shapes.filter(function(e){return!n(e)})),r&&r.brush===t.brush||e.shapes.push(t),u(e)}(e.drawable,t),r(e))},n.cancel=r,n.clear=function(e){e.drawable.shapes.length&&(e.drawable.shapes=[],e.dom.redraw(),u(e.drawable))}},{"./board":4,"./util":18}],9:[function(e,t,n){Object.defineProperty(n,"__esModule",{value:!0});var i=e("./board"),a=e("./util"),r=e("./drag");n.setDropMode=function(e,t){e.dropmode={active:!0,piece:t},r.cancel(e)},n.cancelDropMode=function(e){e.dropmode={active:!1}},n.drop=function(e,t){if(e.dropmode.active){i.unsetPremove(e),i.unsetPredrop(e);var n=e.dropmode.piece;if(n){e.pieces.a0=n;var r=a.eventPosition(t),o=r&&i.getKeyAtDomPos(r,i.whitePov(e),e.dom.bounds());o&&i.dropNewPiece(e,"a0",o)}e.dom.redraw()}}},{"./board":4,"./drag":7,"./util":18}],10:[function(e,t,n){Object.defineProperty(n,"__esModule",{value:!0});var a=e("./drag"),s=e("./draw"),r=e("./drop"),o=e("./util");function u(e,t,n,r){return e.addEventListener(t,n,r),function(){return e.removeEventListener(t,n)}}function c(t,n,r){return function(e){e.shiftKey||o.isRightButton(e)?t.drawable.enabled&&r(t,e):t.viewOnly||n(t,e)}}n.bindBoard=function(e){if(!e.viewOnly){var t=e.dom.elements.board,n=function(t){return function(e){t.draggable.current?a.cancel(t):t.drawable.current?s.cancel(t):e.shiftKey||o.isRightButton(e)?t.drawable.enabled&&s.start(t,e):t.viewOnly||(t.dropmode.active?r.drop(t,e):a.start(t,e))}}(e);t.addEventListener("touchstart",n,{passive:!1}),t.addEventListener("mousedown",n,{passive:!1}),(e.disableContextMenu||e.drawable.enabled)&&t.addEventListener("contextmenu",function(e){return e.preventDefault()})}},n.bindDocument=function(e,t){var n=[];!e.dom.relative&&e.resizable&&n.push(u(document.body,"chessground.resize",function(){e.dom.bounds.clear(),requestAnimationFrame(t)}));if(!e.viewOnly){var r=c(e,a.move,s.move),o=c(e,a.end,s.end);["touchmove","mousemove"].forEach(function(e){return n.push(u(document,e,r))}),["touchend","mouseup"].forEach(function(e){return n.push(u(document,e,o))});var i=function(){return e.dom.bounds.clear()};n.push(u(window,"scroll",i,{passive:!0})),n.push(u(window,"resize",i,{passive:!0}))}return function(){return n.forEach(function(e){return e()})}}},{"./drag":7,"./draw":8,"./drop":9,"./util":18}],11:[function(e,t,n){function r(e,t){e.exploding&&(t?e.exploding.stage=t:e.exploding=void 0,e.dom.redraw())}Object.defineProperty(n,"__esModule",{value:!0}),n.default=function(e,t){e.exploding={stage:1,keys:t},e.dom.redraw(),setTimeout(function(){r(e,2),setTimeout(function(){return r(e,void 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n=i[t.role];return"white"===t.color?n.toUpperCase():n}return"1"}).join("")}).join("/").replace(/1{2,}/g,function(e){return e.length.toString()})}},{"./types":17,"./util":18}],13:[function(e,t,n){Object.defineProperty(n,"__esModule",{value:!0});var s=e("./util");function u(e,t){return Math.abs(e-t)}var c=function(e,t,n,r){var o=u(e,n),i=u(t,r);return 1===o&&2===i||2===o&&1===i},l=function(e,t,n,r){return u(e,n)===u(t,r)},f=function(e,t,n,r){return e===n||t===r},p=function(e,t,n,r){return l(e,t,n,r)||f(e,t,n,r)};var d=s.allKeys.map(s.key2pos);n.default=function(e,t,n){var r=e[t],o=s.key2pos(t),i=r.role,a="pawn"===i?function(o){return function(e,t,n,r){return u(e,n)<2&&("white"===o?r===t+1||t<=2&&r===t+2&&e===n:r===t-1||7<=t&&r===t-2&&e===n)}}(r.color):"knight"===i?c:"bishop"===i?l:"rook"===i?f:"queen"===i?p:function(o,i,a){return function(e,t,n,r){return u(e,n)<2&&u(t,r)<2||a&&t===r&&t===("white"===o?1:8)&&(5===e&&(3===n||7===n)||s.containsX(i,n))}}(r.color,function(n,r){return Object.keys(n).filter(function(e){var t=n[e];return t&&t.color===r&&"rook"===t.role}).map(function(e){return s.key2pos(e)[0]})}(e,r.color),n);return d.filter(function(e){return(o[0]!==e[0]||o[1]!==e[1])&&a(o[0],o[1],e[0],e[1])}).map(s.pos2key)}},{"./util":18}],14:[function(e,t,n){Object.defineProperty(n,"__esModule",{value:!0});var K=e("./util"),U=e("./board"),F=e("./util");function B(e,t){for(var n in t)e.dom.elements.board.removeChild(t[n])}function $(e,t){var n=2+8*(e[1]-1)+(8-e[0]);return t&&(n=67-n),n+""}function H(e){return"".concat(e.color," ").concat(e.role)}function Q(e,t,n){e[t]?e[t]+=" "+n:e[t]=n}n.default=function(e){var t,n,r,o,i,a,s,u,c,l,f,p=U.whitePov(e),d=e.dom.relative?F.posToTranslateRel:F.posToTranslateAbs(e.dom.bounds()),h=e.dom.relative?F.translateRel:F.translateAbs,v=e.dom.elements.board,g=e.pieces,m=e.animation.current,b=m?m.plan.anims:{},y=m?m.plan.fadings:{},w=e.draggable.current,P=function(e){var t,n,r={};if(e.lastMove&&e.highlight.lastMove)for(t in e.lastMove)Q(r,e.lastMove[t],"last-move");if(e.check&&e.highlight.check&&Q(r,e.check,"check"),e.selected&&(Q(r,e.selected,"selected"),e.movable.showDests)){var o=e.movable.dests&&e.movable.dests[e.selected];if(o)for(t in o)n=o[t],Q(r,n,"move-dest"+(e.pieces[n]?" oc":""));var i=e.premovable.dests;if(i)for(t in i)n=i[t],Q(r,n,"premove-dest"+(e.pieces[n]?" oc":""))}var a=e.premovable.current;if(a)for(t in a)Q(r,a[t],"current-premove");else e.predroppable.current&&Q(r,e.predroppable.current.key,"current-premove");var s=e.exploding;if(s)for(t in s.keys)Q(r,s.keys[t],"exploding"+s.stage);return r}(e),E={},k={},C={},S={},x=Object.keys(g);for(r=v.firstChild;r;){if(t=r.cgKey,"PIECE"===r.tagName)if(o=g[t],a=b[t],s=y[t],i=r.cgPiece,!r.cgDragging||w&&w.orig===t||(r.classList.remove("dragging"),h(r,d(K.key2pos(t),p)),r.cgDragging=!1),!s&&r.cgFading&&(r.cgFading=!1,r.classList.remove("fading")),o){if(a&&r.cgAnimating&&i===H(o)){var _=K.key2pos(t);_[0]+=a[2],_[1]+=a[3],r.classList.add("anim"),h(r,d(_,p))}else r.cgAnimating&&(r.cgAnimating=!1,r.classList.remove("anim"),h(r,d(K.key2pos(t),p)),e.addPieceZIndex&&(r.style.zIndex=$(K.key2pos(t),p)));i!==H(o)||s&&r.cgFading?s&&i===H(s)?(r.classList.add("fading"),r.cgFading=!0):C[i]?C[i].push(r):C[i]=[r]:E[t]=!0}else C[i]?C[i].push(r):C[i]=[r];else if("SQUARE"===r.tagName){var A=r.className;P[t]===A?k[t]=!0:S[A]?S[A].push(r):S[A]=[r]}r=r.nextSibling}for(var T in P)if(!k[T]){f=(l=S[P[T]])&&l.pop();var O=d(K.key2pos(T),p);if(f)f.cgKey=T,h(f,O);else{var N=K.createEl("square",P[T]);N.cgKey=T,h(N,O),v.insertBefore(N,v.firstChild)}}for(var j in x)if(n=g[t=x[j]],a=b[t],!E[t])if(c=(u=C[H(n)])&&u.pop()){c.cgKey=t,c.cgFading&&(c.classList.remove("fading"),c.cgFading=!1);var M=K.key2pos(t);e.addPieceZIndex&&(c.style.zIndex=$(M,p)),a&&(c.cgAnimating=!0,c.classList.add("anim"),M[0]+=a[2],M[1]+=a[3]),h(c,d(M,p))}else{var D=H(n),L=K.createEl("piece",D),q=K.key2pos(t);L.cgPiece=D,L.cgKey=t,a&&(L.cgAnimating=!0,q[0]+=a[2],q[1]+=a[3]),h(L,d(q,p)),e.addPieceZIndex&&(L.style.zIndex=$(q,p)),v.appendChild(L)}for(var R in C)B(e,C[R]);for(var I in S)B(e,S[I])}},{"./board":4,"./util":18}],15:[function(e,t,n){Object.defineProperty(n,"__esModule",{value:!0});var r=e("./fen"),o=e("./util");n.defaults=function(){return{pieces:r.read(r.initial),orientation:"white",turnColor:"white",coordinates:!0,autoCastle:!0,viewOnly:!1,disableContextMenu:!1,resizable:!0,addPieceZIndex:!1,pieceKey:!1,highlight:{lastMove:!0,check:!0},animation:{enabled:!0,duration:200},movable:{free:!0,color:"both",showDests:!0,events:{},rookCastle:!0},premovable:{enabled:!0,showDests:!0,castle:!0,events:{}},predroppable:{enabled:!1,events:{}},draggable:{enabled:!0,distance:3,autoDistance:!0,centerPiece:!0,showGhost:!0,deleteOnDropOff:!1},dropmode:{active:!1},selectable:{enabled:!0},stats:{dragged:!("ontouchstart"in 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XMLHttpRequest,r=function(){e.contentDocument.write("<x-streaming>"),i.innerHTML="",i.appendChild(e.contentDocument.querySelector("x-streaming"))};n.onprogress=function(){!t&&n.response.length&&r(),e.contentDocument.write(n.response.slice(t)),t=n.response.length},n.onload=function(){u=null,!t&&n.response.length&&r(),e.contentDocument.write(n.response.slice(t)),e.contentDocument.write("</x-streaming>"),e.contentDocument.close(),document.body.removeChild(e),s(c("a.list-group-item"))},n.onerror=function(){u=null,c(".right-side > .inner").empty().append(c("<section>").append(c('<h2 id="status"></h2>').text("Network error "+n.status)).append(c('<div id="info"></div>').text(n.statusText)))},n.responseType="text",n.open("GET","/?fen="+encodeURIComponent(f(o))+"&xhr=probe"),n.send()})})}function g(e){e.bind("positionChanged",function(e){var t=e.fen().split(/\s/)[0];document.title=o("K",i(t,"K"))+o("Q",i(t,"Q"))+o("R",i(t,"R"))+o("B",i(t,"B"))+o("N",i(t,"N"))+o("P",i(t,"P"))+"v"+o("K",i(t,"k"))+o("Q",i(t,"q"))+o("R",i(t,"r"))+o("B",i(t,"b"))+o("N",i(t,"n"))+o("P",i(t,"p"))+" – Syzygy endgame tablebases"})}s.prototype.bind=function(e,t){this.events[e]=this.events[e]||[],this.events[e].push(t)},s.prototype.trigger=function(e){var t=this,n=arguments;(this.events[e]||[]).forEach(function(e){e.apply(t,Array.prototype.slice.call(n,1))})},s.prototype.toggleFlipped=function(){this.flipped=!this.flipped,this.trigger("flipped",this.flipped)},s.prototype.toggleEditMode=function(){this.editMode=!this.editMode,this.trigger("editMode",this.editMode)},s.prototype.push=function(e){var t=f(e);if(f(this.position)!=t&&"pushState"in history){var n=e.undo();history.pushState({fen:e.fen(),lastMove:n},null,"/?fen="+t.replace(/\s/g,"_")),n&&e.move(n)}this.setPosition(e)},s.prototype.pushMove=function(t,n,r){var e=new l(this.position.fen()),o=e.moves({verbose:!0}).filter(function(e){return e.from==t&&e.to===n&&e.promotion==r});return 1===o.length&&(e.move(o[0]),this.push(e),!0)},s.prototype.setPosition=function(e){f(this.position)!=f(e)&&(this.position=e,this.trigger("positionChanged",e))},u.prototype.setPosition=function(n){var e=n.history({verbose:!0}).map(function(e){return[e.from,e.to]}),r={};n.SQUARES.forEach(function(e){var t=n.moves({square:e,verbose:!0}).map(function(e){return e.to});t.length&&(r[e]=t)});var t="w"===n.turn()?"white":"black";this.ground.set({lastMove:e[e.length-1],fen:n.fen(),turnColor:t,check:!!n.in_check()&&t,movable:{dests:r}})},u.prototype.setFlipped=function(e){var t=e?"white":"black";t===this.ground.state.orientation&&this.ground.toggleOrientation(),c(".spare.bottom piece").attr("data-color",this.ground.state.orientation),c(".spare.bottom piece").toggleClass("white","white"===this.ground.state.orientation),c(".spare.bottom piece").toggleClass("black","black"===this.ground.state.orientation),c(".spare.top piece").attr("data-color",t),c(".spare.top piece").toggleClass("white","white"==t),c(".spare.top piece").toggleClass("black","black"==t)},u.prototype.unsetHovering=function(){this.ground.setAutoShapes([])},u.prototype.setHovering=function(e){this.ground.setAutoShapes([{orig:e.substr(0,2),dest:e.substr(2,2),brush:"green"}])},p.prototype.setPosition=function(e){c("#btn-white").toggleClass("active","w"===e.turn()),c("#btn-black").toggleClass("active","b"===e.turn())},d.prototype.setPosition=function(e){var t=f(e);c("#fen").val(t===a?"":t)},c(function(){var e=new s(c("#board").attr("data-fen")),t=new u(e);new p(e),new d(e),new h(e,t),new g(e),new v(e,t)})},{"chess.js":1,chessground:5,"zepto-browserify":20}]},{},[21]);