diff --git a/public/javascripts/vendor/chessground.min.js b/public/javascripts/vendor/chessground.min.js
index b561e44b5f..cd1294762d 100755
--- a/public/javascripts/vendor/chessground.min.js
+++ b/public/javascripts/vendor/chessground.min.js
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a=t.bounds(),i=a.width/8,s=a.height/8,c={},u=[],d=[],f=[],p=[],h=e.orientation!==t.orientation,v={},m="white"===t.orientation;for(var g in e.pieces){var b=n(g,e.pieces[g],h);v[b.key]=b}return l.allKeys.forEach(function(e){if(e!==t.movable.dropped[1]){var o=t.pieces[e],a=v[e];o?a?r(o,a)||(f.push(a),p.push(n(e,o,!1))):p.push(n(e,o,!1)):a&&f.push(a)}}),p.forEach(function(e){var t=o(e,f.filter(l.partial(r,e)));if(t){var n=m?t.pos:e.pos,a=m?e.pos:t.pos,d=[(n[0]-a[0])*i,(a[1]-n[1])*s];c[e.key]=[d,d],u.push(t.key)}}),f.forEach(function(e){e.key===t.movable.dropped[0]||l.containsX(u,e.key)||d.push({piece:{role:e.role,color:e.color},left:12.5*(m?e.pos[0]-1:8-e.pos[0])+"%",bottom:12.5*(m?e.pos[1]-1:8-e.pos[1])+"%",opacity:1})}),{anims:c,fadings:d}}function i(e,t){return Math.round(e*t)/t}function s(e){if(e.animation.current.start){var t=1-((new Date).getTime()-e.animation.current.start)/e.animation.current.duration;if(0>=t)e.animation.current={},e.render();else{var n=u.easeInOutCubic(t);for(var r in e.animation.current.anims){var o=e.animation.current.anims[r];o[1]=[i(o[0][0]*n,10),i(o[0][1]*n,10)]}for(var a in e.animation.current.fadings)e.animation.current.fadings[a].opacity=i(n,100);e.render(),requestAnimationFrame(function(){s(e)})}}}function c(e,t){var n={orientation:t.orientation,pieces:{}};for(var r in t.pieces)n.pieces[r]={role:t.pieces[r].role,color:t.pieces[r].color};var o=e(),i=a(n,t);if(Object.keys(i.anims).length>0||i.fadings.length>0){var c=t.animation.current.start;t.animation.current={start:(new Date).getTime(),duration:t.animation.duration,anims:i.anims,fadings:i.fadings},c||s(t)}else t.renderRAF();return o}var l=(e("mithril"),e("./util")),u={easeInOutCubic:function(e){return.5>e?4*e*e*e:(e-1)*(2*e-2)*(2*e-2)+1}};t.exports=function(e,t,n){return function(){var r=[t].concat(Array.prototype.slice.call(arguments,0));if(t.render){if(t.animation.enabled&&!n)return c(l.partialApply(e,r),t);var o=e.apply(null,r);return t.renderRAF(),o}return e.apply(null,r)}}},{"./util":14,mithril:3}],5:[function(e,t){var n=(e("mithril"),e("./board"));t.exports=function(e){return{set:e.set,toggleOrientation:e.toggleOrientation,getOrientation:function(){return e.data.orientation},getPieces:function(){return e.data.pieces},getMaterialDiff:function(){return n.getMaterialDiff(e.data)},getFen:e.getFen,dump:function(){return e.data},move:e.apiMove,setPieces:e.setPieces,setCheck:e.setCheck,playPremove:e.playPremove,cancelPremove:e.cancelPremove,cancelMove:e.cancelMove,stop:e.stop}}},{"./board":6,mithril:3}],6:[function(e,t){function n(e){setTimeout(e,1)}function r(e){e.orientation=O.opposite(e.orientation)}function o(e){e.lastMove=null,h(e,null),c(e)}function a(e,t){Object.keys(t).forEach(function(n){t[n]?e.pieces[n]=t[n]:delete e.pieces[n]}),e.movable.dropped=[]}function i(e,t){var n=t||e.turnColor;Object.keys(e.pieces).forEach(function(t){e.pieces[t].color===n&&"king"===e.pieces[t].role&&(e.check=t)})}function s(e,t,r){e.premovable.current=[t,r],n(O.partial(e.premovable.events.set,t,r))}function c(e){e.premovable.current&&(e.premovable.current=null,n(e.premovable.events.unset))}function l(e,t,r){var o=j(function(){return t!==r&&e.pieces[t]?(e.pieces[r]&&n(O.partial(e.events.capture,r,e.pieces[r])),e.pieces[r]=e.pieces[t],delete e.pieces[t],e.lastMove=[t,r],e.check=null,n(e.events.change),!0):!1},e)();return o&&(e.movable.dropped=[]),o}function u(e,t,n){var r=l(e,t,n);return r&&(e.movable.dests={},e.turnColor=O.opposite(e.turnColor)),r}function d(e,t,n){return l(e,t,n)}function f(e,t,r){r?m(e,t,r)?u(e,t,r)&&(h(e,null),n(O.partial(e.movable.events.after,t,r,{premove:!1,holdTime:P.stop()}))):b(e,t,r)?(s(e,t,r),h(e,null)):v(e,r)||g(e,r)?h(e,r):h(e,null):(h(e,null),"trash"===e.movable.dropOff&&(delete e.pieces[t],n(e.events.change)))}function p(e,t){e.selected?t?e.selected!==t&&f(e,e.selected,t):h(e,null):(v(e,t)||g(e,t))&&h(e,t),t&&n(O.partial(e.events.select,t))}function h(e,t){e.selected=t,e.premovable.dests=t&&g(e,t)?M(e.pieces,t):null}function v(e,t){var n=e.pieces[t];return n&&("both"===e.movable.color||e.movable.color===n.color&&e.turnColor===n.color)}function m(e,t,n){return t!==n&&v(e,t)&&(e.movable.free||O.containsX(e.movable.dests[t],n))}function g(e,t){var n=e.pieces[t];return n&&e.premovable.enabled&&e.movable.color===n.color&&e.turnColor!==n.color}function b(e,t,n){return t!==n&&g(e,t)&&O.containsX(M(e.pieces,t),n)}function y(e,t){var n=e.pieces[t];return n&&e.draggable.enabled&&("both"===e.movable.color||e.movable.color===n.color&&(e.turnColor===n.color||e.premovable.enabled))}function w(e){var t=e.premovable.current;if(t){var r=t[0],o=t[1];m(e,r,o)&&u(e,r,o)&&n(O.partial(e.movable.events.after,r,o,{premove:!0})),c(e)}}function x(e){c(e),p(e,null)}function k(e){e.movable.color=null,e.movable.dests={},x(e)}function E(e,t,n){if(n||e.bounds){n=n||e.bounds();var r=Math.ceil(8*((t[0]-n.left)/n.width));r="white"===e.orientation?r:9-r;var o=Math.ceil(8-8*((t[1]-n.top)/n.height));return o="white"===e.orientation?o:9-o,r>0&&9>r&&o>0&&9>o?O.pos2key([r,o]):void 0}}function C(e){var t={king:0,queen:0,rook:0,bishop:0,knight:0,pawn:0};for(var n in e.pieces){var r=e.pieces[n];t[r.role]+="white"===r.color?1:-1}var o={white:{},black:{}};for(var a in t){var i=t[a];i>0?o.white[a]=i:0>i&&(o.black[a]=-i)}return o}var O=e("./util"),M=e("./premove"),j=e("./anim"),P=e("./hold");t.exports={reset:o,toggleOrientation:r,setPieces:a,setCheck:i,selectSquare:p,setSelected:h,isDraggable:y,canMove:m,userMove:f,apiMove:d,playPremove:w,unsetPremove:c,cancelMove:x,stop:k,getKeyAtDomPos:E,getMaterialDiff:C}},{"./anim":4,"./hold":12,"./premove":13,"./util":14}],7:[function(e,t){var n=e("merge"),r=e("./board"),o=e("./fen");t.exports=function(e,t){t&&(t.movable&&t.movable.dests&&delete e.movable.dests,n.recursive(e,t),e.fen&&(e.pieces=o.read(e.fen),e.check=t.check,delete e.fen),e.check===!0&&r.setCheck(e),e.movable.dropped=[],e.selected&&r.setSelected(e,e.selected),e.animation.duration<10&&(e.animation.enabled=!1))}},{"./board":6,"./fen":11,merge:2}],8:[function(e,t){var n=e("./board"),r=e("./data"),o=e("./fen"),a=e("./configure"),i=e("./anim"),s=e("./drag");t.exports=function(e){this.data=r(e),this.getFen=function(){return o.write(this.data.pieces)}.bind(this),this.set=i(a,this.data),this.toggleOrientation=i(n.toggleOrientation,this.data),this.setPieces=i(n.setPieces,this.data),this.selectSquare=i(n.selectSquare,this.data,!0),this.apiMove=i(n.apiMove,this.data),this.playPremove=i(n.playPremove,this.data),this.cancelPremove=i(n.unsetPremove,this.data,!0),this.setCheck=i(n.setCheck,this.data,!0),this.cancelMove=i(function(e){n.cancelMove(e),s.cancel(e)}.bind(this),this.data,!0),this.stop=i(function(e){n.stop(e),s.cancel(e)}.bind(this),this.data,!0)}},{"./anim":4,"./board":6,"./configure":7,"./data":9,"./drag":10,"./fen":11}],9:[function(e,t){var n=e("./fen"),r=e("./configure");t.exports=function(e){var t={pieces:n.read(n.initial),orientation:"white",turnColor:"white",check:null,lastMove:null,selected:null,coordinates:!0,render:null,renderRAF:null,element:null,bounds:null,viewOnly:!1,minimalDom:!1,highlight:{lastMove:!0,check:!0,dragOver:!0},animation:{enabled:!0,duration:200,current:{}},movable:{free:!0,color:"both",dests:{},dropOff:"revert",dropped:[],showDests:!0,events:{after:function(){}}},premovable:{enabled:!0,showDests:!0,dests:[],current:null,events:{set:function(){},unset:function(){}}},draggable:{enabled:!0,distance:3,squareTarget:!1,centerPiece:!0,showGhost:!0,current:{}},events:{change:function(){},capture:function(){},select:function(){}}};return r(t,e||{}),t}},{"./configure":7,"./fen":11}],10:[function(e,t){function n(e){return e?e.color+" "+e.role:""}function r(e,t){if(!(void 0!==t.button&&0!==t.button||t.touches&&t.touches.length>1)){t.stopPropagation(),t.preventDefault(),c=t.target;var r=e.selected,a=u.eventPosition(t),i=e.bounds(),s=l.getKeyAtDomPos(e,a,i),f=!!e.premovable.current;l.selectSquare(e,s);var p=e.selected===s;if(e.pieces[s]&&p&&l.isDraggable(e,s)){var h=e.element.querySelector("."+s).getBoundingClientRect();e.draggable.current={previouslySelected:r,orig:s,piece:n(e.pieces[s]),rel:a,epos:a,pos:[0,0],dec:e.draggable.centerPiece?[a[0]-(h.left+h.width/2),a[1]-(h.top+h.height/2)]:[0,0],bounds:i,started:!1},d.start()}else f&&l.unsetPremove(e);o(e)}}function o(e){requestAnimationFrame(function(){var t=e.draggable.current;t.orig&&(e.animation.current.start&&-1!==Object.keys(e.animation.current.anims).indexOf(t.orig)&&(e.animation.current={}),n(e.pieces[t.orig])!=t.piece?s(e):(!t.started&&u.distance(t.epos,t.rel)>=e.draggable.distance&&(t.started=!0),t.started&&(t.pos=[t.epos[0]-t.rel[0],t.epos[1]-t.rel[1]],t.over=l.getKeyAtDomPos(e,t.epos,t.bounds)))),e.render(),t.orig&&o(e)})}function a(e,t){t.touches&&t.touches.length>1||e.draggable.current.orig&&(e.draggable.current.epos=u.eventPosition(t))}function i(e,t){var n=e.draggable,r=n.current?n.current.orig:null;r&&(t&&"touchend"===t.type&&c!==t.target||(l.unsetPremove(e),n.current.started?(dest=n.current.over,r!==dest&&(e.movable.dropped=[r,dest]),l.userMove(e,r,dest)):n.current.previouslySelected===r&&l.setSelected(e,null),n.current={}))}function s(e){e.draggable.current.orig&&(e.draggable.current={},l.selectSquare(e,null))}{var c,l=e("./board"),u=e("./util"),d=e("./hold");e("mithril")}t.exports={start:r,move:a,end:i,cancel:s,processDrag:o}},{"./board":6,"./hold":12,"./util":14,mithril:3}],11:[function(e,t){function n(e){"start"===e&&(e=a);var t={};return e.replace(/ .+$/,"").split("/").forEach(function(e,n){var r=0;e.split("").forEach(function(e){var a=parseInt(e);a?r+=a:(r++,t[o.pos2key([r,8-n])]={role:i[e.toLowerCase()],color:e===e.toLowerCase()?"black":"white"})})}),t}function r(e){return[8,7,6,5,4,3,2].reduce(function(e,t){return e.replace(new RegExp(Array(t+1).join("1"),"g"),t)},o.invRanks.map(function(t){return o.ranks.map(function(n){var r=e[o.pos2key([n,t])];if(r){var a=s[r.role];return"white"===r.color?a.toUpperCase():a}return"1"}).join("")}).join("/"))}var o=e("./util"),a="rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR",i={p:"pawn",r:"rook",n:"knight",b:"bishop",q:"queen",k:"king"},s={pawn:"p",rook:"r",knight:"n",bishop:"b",queen:"q",king:"k"};t.exports={initial:a,read:n,write:r}},{"./util":14}],12:[function(e,t){var n,r=function(){n=new Date},o=function(){n=null},a=function(){if(!n)return 0;var e=new Date-n;return n=null,e};t.exports={start:r,cancel:o,stop:a}},{}],13:[function(e,t){function n(e,t){return Math.abs(e-t)}function r(e,t,r,o,a){return n(t,o)<2&&("white"===e?a===r+1||2===r&&4===a&&t===o:a===r-1||7===r&&5===a&&t===o)}function o(e,t,r,o){var a=n(e,r),i=n(t,o);return 1===a&&2===i||2===a&&1===i}function a(e,t,r,o){return n(e,r)===n(t,o)}function i(e,t,n,r){return e===n||t===r}function s(e,t,n,r){return a(e,t,n,r)||i(e,t,n,r)}function c(e,t,r,o,a,i){return n(r,a)<2&&n(o,i)<2||o===i&&o===("white"===e?1:8)&&(5===r&&(3===a||7===a)||d.containsX(t,a))}function l(e,t){return Object.keys(e).filter(function(n){var r=e[n];return r&&r.color===t&&"rook"===r.role}).map(function(e){return d.key2pos(e)[0]})}function u(e,t){var n,u=e[t],f=d.key2pos(t);switch(u.role){case"pawn":n=r.bind(null,u.color);break;case"knight":n=o;break;case"bishop":n=a;break;case"rook":n=i;break;case"queen":n=s;break;case"king":n=c.bind(null,u.color,l(e,u.color))}return d.allPos.filter(function(e){return(f[0]!==e[0]||f[1]!==e[1])&&n(f[0],f[1],e[0],e[1])}).map(d.pos2key)}var d=e("./util");t.exports=u},{"./util":14}],14:[function(e,t){function n(e){return g[e[0]-1]+e[1]}function r(e){return[g.indexOf(e[0])+1,parseInt(e[1])]}function o(e){return g[7-g.indexOf(e[0])]+(9-parseInt(e[1]))}function a(e){var t=[];for(var n in e)e[n]&&t.push(n);return t.join(" ")}function i(e){return"white"===e?"black":"white"}function s(e,t){return e&&(e[0]===t||e[1]===t)}function c(e,t){return e&&-1!==e.indexOf(t)}function l(e,t){return Math.sqrt(Math.pow(e[0]-t[0],2)+Math.pow(e[1]-t[1],2))}function u(){return m||(m=d()),m}function d(){return"transform"in document.body.style?"transform":"webkitTransform"in document.body.style?"webkitTransform":"mozTransform"in document.body.style?"mozTransform":"oTransform"in document.body.style?"oTransform":"msTransform"}function f(e){return"translate3d("+e[0]+"px,"+e[1]+"px,0)"}function p(e){return e.touches?[e.targetTouches[0].clientX,e.targetTouches[0].clientY]:[e.clientX,e.clientY]}function h(e,t){return e.bind.apply(e,[null].concat(t))}function v(){return h(arguments[0],Array.prototype.slice.call(arguments,1))}var m,g="abcdefgh".split(""),b=[1,2,3,4,5,6,7,8],y=[8,7,6,5,4,3,2,1],w=function(){var e=[];return y.forEach(function(t){b.forEach(function(n){e.push([n,t])})}),e}(),x=w.slice().reverse(),k=w.map(n);t.exports={files:g,ranks:b,invRanks:y,allPos:w,invPos:x,allKeys:k,pos2key:n,key2pos:r,invertKey:o,classSet:a,opposite:i,translate:f,contains2:s,containsX:c,distance:l,eventPosition:p,partialApply:h,partial:v,transformProp:u}},{}],15:[function(e,t){function n(e){return["cg-piece",e.role,e.color].join(" ")}function r(e,t,r){var o={style:{},"class":n(r)},a=e.data.draggable.current;if(a.orig!==t||0===a.pos[0]&&0===a.pos[1]){if(e.data.animation.current.anims){var i=e.data.animation.current.anims[t];i&&(o.style[f.transformProp()]=f.translate(i[1]))}}else o.style[f.transformProp()]=f.translate([a.pos[0]+a.dec[0],a.pos[1]+a.dec[1]]),o.class+=" dragging";return{tag:"div",attrs:o}}function o(e){return{tag:"div",attrs:{"class":n(e)+" ghost"}}}function a(e,t,n){var a=f.files[t[0]-1],i=t[1],s=a+i,c=e.data.pieces[s],l=e.data.highlight.dragOver&&e.data.draggable.current.over===s,u={"class":"cg-square 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n=e("./fen"),r=e("./configure");t.exports=function(e){var t={pieces:n.read(n.initial),orientation:"white",turnColor:"white",check:null,lastMove:null,selected:null,coordinates:!0,render:null,renderRAF:null,element:null,bounds:null,viewOnly:!1,minimalDom:!1,highlight:{lastMove:!0,check:!0,dragOver:!0},animation:{enabled:!0,duration:200,current:{}},movable:{free:!0,color:"both",dests:{},dropOff:"revert",dropped:[],showDests:!0,events:{after:function(){}}},premovable:{enabled:!0,showDests:!0,dests:[],current:null,events:{set:function(){},unset:function(){}}},draggable:{enabled:!0,distance:3,squareTarget:!1,centerPiece:!0,showGhost:!0,current:{}},events:{change:function(){},capture:function(){},select:function(){}}};return r(t,e||{}),t}},{"./configure":7,"./fen":11}],10:[function(e,t){function n(e){return e?e.color+" "+e.role:""}function r(e,t){if(!(void 0!==t.button&&0!==t.button||t.touches&&t.touches.length>1)){t.stopPropagation(),t.preventDefault(),c=t.target;var 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r(e){return[8,7,6,5,4,3,2].reduce(function(e,t){return e.replace(new RegExp(Array(t+1).join("1"),"g"),t)},o.invRanks.map(function(t){return o.ranks.map(function(n){var r=e[o.pos2key([n,t])];if(r){var a=s[r.role];return"white"===r.color?a.toUpperCase():a}return"1"}).join("")}).join("/"))}var o=e("./util"),a="rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR",i={p:"pawn",r:"rook",n:"knight",b:"bishop",q:"queen",k:"king"},s={pawn:"p",rook:"r",knight:"n",bishop:"b",queen:"q",king:"k"};t.exports={initial:a,read:n,write:r}},{"./util":14}],12:[function(e,t){var n,r=function(){n=new Date},o=function(){n=null},a=function(){if(!n)return 0;var e=new Date-n;return n=null,e};t.exports={start:r,cancel:o,stop:a}},{}],13:[function(e,t){function n(e,t){return Math.abs(e-t)}function r(e,t,r,o,a){return n(t,o)<2&&("white"===e?a===r+1||2===r&&4===a&&t===o:a===r-1||7===r&&5===a&&t===o)}function o(e,t,r,o){var a=n(e,r),i=n(t,o);return 1===a&&2===i||2===a&&1===i}function a(e,t,r,o){return n(e,r)===n(t,o)}function i(e,t,n,r){return e===n||t===r}function s(e,t,n,r){return a(e,t,n,r)||i(e,t,n,r)}function c(e,t,r,o,a,i){return n(r,a)<2&&n(o,i)<2||o===i&&o===("white"===e?1:8)&&(5===r&&(3===a||7===a)||d.containsX(t,a))}function l(e,t){return Object.keys(e).filter(function(n){var r=e[n];return r&&r.color===t&&"rook"===r.role}).map(function(e){return d.key2pos(e)[0]})}function u(e,t){var n,u=e[t],f=d.key2pos(t);switch(u.role){case"pawn":n=r.bind(null,u.color);break;case"knight":n=o;break;case"bishop":n=a;break;case"rook":n=i;break;case"queen":n=s;break;case"king":n=c.bind(null,u.color,l(e,u.color))}return d.allPos.filter(function(e){return(f[0]!==e[0]||f[1]!==e[1])&&n(f[0],f[1],e[0],e[1])}).map(d.pos2key)}var d=e("./util");t.exports=u},{"./util":14}],14:[function(e,t){function n(e){return g[e[0]-1]+e[1]}function r(e){return[g.indexOf(e[0])+1,parseInt(e[1])]}function o(e){return g[7-g.indexOf(e[0])]+(9-parseInt(e[1]))}function a(e){var t=[];for(var n in e)e[n]&&t.push(n);return t.join(" ")}function i(e){return"white"===e?"black":"white"}function s(e,t){return e&&(e[0]===t||e[1]===t)}function c(e,t){return e&&-1!==e.indexOf(t)}function l(e,t){return Math.sqrt(Math.pow(e[0]-t[0],2)+Math.pow(e[1]-t[1],2))}function u(){return m||(m=d()),m}function d(){return"transform"in document.body.style?"transform":"webkitTransform"in document.body.style?"webkitTransform":"mozTransform"in document.body.style?"mozTransform":"oTransform"in document.body.style?"oTransform":"msTransform"}function f(e){return"translate3d("+e[0]+"px,"+e[1]+"px,0)"}function p(e){return e.touches?[e.targetTouches[0].clientX,e.targetTouches[0].clientY]:[e.clientX,e.clientY]}function h(e,t){return e.bind.apply(e,[null].concat(t))}function v(){return h(arguments[0],Array.prototype.slice.call(arguments,1))}var m,g="abcdefgh".split(""),b=[1,2,3,4,5,6,7,8],y=[8,7,6,5,4,3,2,1],w=function(){var e=[];return y.forEach(function(t){b.forEach(function(n){e.push([n,t])})}),e}(),x=w.slice().reverse(),k=w.map(n);t.exports={files:g,ranks:b,invRanks:y,allPos:w,invPos:x,allKeys:k,pos2key:n,key2pos:r,invertKey:o,classSet:a,opposite:i,translate:f,contains2:s,containsX:c,distance:l,eventPosition:p,partialApply:h,partial:v,transformProp:u}},{}],15:[function(e,t){function n(e){return["cg-piece",e.role,e.color].join(" ")}function r(e,t,r){var o={style:{},"class":n(r)},a=e.data.draggable.current;if(a.orig!==t||0===a.pos[0]&&0===a.pos[1]){if(e.data.animation.current.anims){var i=e.data.animation.current.anims[t];i&&(o.style[f.transformProp()]=f.translate(i[1]))}}else o.style[f.transformProp()]=f.translate([a.pos[0]+a.dec[0],a.pos[1]+a.dec[1]]),o.class+=" dragging";return{tag:"div",attrs:o}}function o(e){return{tag:"div",attrs:{"class":n(e)+" ghost"}}}function a(e,t,n){var a=f.files[t[0]-1],i=t[1],s=a+i,c=e.data.pieces[s],l=e.data.highlight.dragOver&&e.data.draggable.current.over===s,u={"class":"cg-square "+s+" "+f.classSet({selected:e.data.selected===s,check:e.data.highlight.check&&e.data.check===s,"last-move":e.data.highlight.lastMove&&f.contains2(e.data.lastMove,s),"move-dest":(l||e.data.movable.showDests)&&f.containsX(e.data.movable.dests[e.data.selected],s),"premove-dest":(l||e.data.premovable.showDests)&&f.containsX(e.data.premovable.dests,s),"current-premove":f.contains2(e.data.premovable.current,s),"drag-over":l,occupied:!!c,exploding:e.vm.exploding&&-1!==e.vm.exploding.indexOf(s)}),style:{left:12.5*(n?t[0]-1:8-t[0])+"%",bottom:12.5*(n?t[1]-1:8-t[1])+"%"}};e.data.coordinates&&(t[1]===(n?1:8)&&(u["data-coord-x"]=a),t[0]===(n?8:1)&&(u["data-coord-y"]=i));
+var d=[];return c&&(d.push(r(e,s,c)),e.data.draggable.current.orig===s&&e.data.draggable.showGhost&&d.push(o(c))),{tag:"div",attrs:u,children:d}}function i(e,t){var n=f.key2pos(t.over),r="white"===e.data.orientation?n[0]:9-n[0],o="white"===e.data.orientation?n[1]:9-n[1];return{tag:"div",attrs:{id:"cg-square-target",style:{width:t.bounds.width/4+"px",height:t.bounds.height/4+"px",left:(r-1.5)*t.bounds.width/8+"px",top:(7.5-o)*t.bounds.height/8+"px"}}}}function s(e){return{tag:"div",attrs:{"class":"cg-square fading",style:{left:e.left,bottom:e.bottom,opacity:e.opacity}},children:[{tag:"div",attrs:{"class":n(e.piece)}}]}}function c(e,t){var r=[];return e.data.lastMove&&e.data.lastMove.forEach(function(e){var n=f.key2pos(e);r.push({tag:"div",attrs:{"class":"cg-square last-move",style:{left:12.5*(t?n[0]-1:8-n[0])+"%",bottom:12.5*(t?n[1]-1:8-n[1])+"%"}}})}),Object.keys(e.data.pieces).forEach(function(o){var a=f.key2pos(o),i={style:{left:12.5*(t?a[0]-1:8-a[0])+"%",bottom:12.5*(t?a[1]-1:8-a[1])+"%"},"class":n(e.data.pieces[o])};if(e.data.animation.current.anims){var s=e.data.animation.current.anims[o];s&&(i.style[f.transformProp()]=f.translate(s[1]))}r.push({tag:"div",attrs:i})}),r}function l(e){var t="white"==e.data.orientation;if(e.data.minimalDom)return c(e,t);var n=(t?f.allPos:f.invPos).map(function(n){return a(e,n,t)});return e.data.draggable.current.over&&e.data.draggable.squareTarget&&n.push(i(e,e.data.draggable.current)),e.data.animation.current.fadings&&e.data.animation.current.fadings.forEach(function(e){n.push(s(e))}),n}function u(e,t,n){var r=f.partial(p.start,e.data),o=f.partial(p.move,e.data),a=f.partial(p.end,e.data),i=["touchstart","mousedown"],s=["touchmove","mousemove"],c=["touchend","mouseup"];i.forEach(function(e){t.addEventListener(e,r)}),s.forEach(function(e){document.addEventListener(e,o)}),c.forEach(function(e){document.addEventListener(e,a)}),n.onunload=function(){i.forEach(function(e){t.removeEventListener(e,r)}),s.forEach(function(e){document.removeEventListener(e,o)}),c.forEach(function(e){document.removeEventListener(e,a)})}}function d(e){return{tag:"div",attrs:{"class":"cg-board orientation-"+e.data.orientation,config:function(t,n,r){n||(e.data.viewOnly||u(e,t,r),e.data.render=function(){h.render(t,l(e))},e.data.renderRAF=function(){requestAnimationFrame(e.data.render)},e.data.bounds=t.getBoundingClientRect.bind(t),e.data.element=t,e.data.render())}},children:[]}}var f=e("./util"),p=(e("./board"),e("./drag")),f=e("./util"),h=e("mithril");t.exports=function(e){return{tag:"div",attrs:{"class":["cg-board-wrap",e.data.viewOnly?"view-only":"manipulable",e.data.minimalDom?"minimal-dom":"full-dom"].join(" ")},children:[d(e)]}}},{"./board":6,"./drag":10,"./util":14,mithril:3}]},{},[1])(1)});
\ No newline at end of file
diff --git a/public/stylesheets/chessground.css b/public/stylesheets/chessground.css
index 0ecbaac078..570a7126c0 100644
--- a/public/stylesheets/chessground.css
+++ b/public/stylesheets/chessground.css
@@ -129,6 +129,9 @@ body.highlight .cg-board .cg-square.check {
 body.base .cg-board .cg-square.current-premove {
   background-color: rgba(20, 30, 85, 0.5);
 }
+body.base .cg-board .cg-square.exploding {
+  background-color: rgba(255, 0, 0, 0.5);
+}
 .cg-piece {
   width: 100%;
   height: 100%;
diff --git a/ui/analyse/package.json b/ui/analyse/package.json
index 67fd26590e..c4f33e01e0 100644
--- a/ui/analyse/package.json
+++ b/ui/analyse/package.json
@@ -30,7 +30,7 @@
     "watchify": "^1.0.2"
   },
   "dependencies": {
-    "chessground": "1.8.2",
+    "chessground": "1.8.4",
     "chessli.js": "file:../chessli",
     "game": "file:../game",
     "lodash-node": "^2.4.1",
diff --git a/ui/editor/package.json b/ui/editor/package.json
index 6e3620b630..45eb9730e4 100644
--- a/ui/editor/package.json
+++ b/ui/editor/package.json
@@ -30,7 +30,7 @@
     "watchify": "^1.0.2"
   },
   "dependencies": {
-    "chessground": "1.8.2",
+    "chessground": "1.8.4",
     "lodash-node": "^2.4.1",
     "mithril": "0.1.27"
   }
diff --git a/ui/lobby/package.json b/ui/lobby/package.json
index 00a1afc468..ad8a89f516 100644
--- a/ui/lobby/package.json
+++ b/ui/lobby/package.json
@@ -30,7 +30,7 @@
     "watchify": "^1.0.2"
   },
   "dependencies": {
-    "chessground": "1.8.2",
+    "chessground": "1.8.4",
     "lodash-node": "^2.4.1",
     "mithril": "0.1.27"
   }
diff --git a/ui/puzzle/package.json b/ui/puzzle/package.json
index 23e5adef01..673685594e 100644
--- a/ui/puzzle/package.json
+++ b/ui/puzzle/package.json
@@ -30,7 +30,7 @@
     "watchify": "^1.0.2"
   },
   "dependencies": {
-    "chessground": "1.8.2",
+    "chessground": "1.8.4",
     "chessli.js": "file:../chessli",
     "lodash-node": "^2.4.1",
     "merge": "^1.2.0",
diff --git a/ui/round/package.json b/ui/round/package.json
index 67d357d5bc..725205e54b 100644
--- a/ui/round/package.json
+++ b/ui/round/package.json
@@ -30,7 +30,7 @@
     "watchify": "^1.0.2"
   },
   "dependencies": {
-    "chessground": "1.8.2",
+    "chessground": "1.8.4",
     "chessli.js": "file:../chessli",
     "game": "file:../game",
     "lodash-node": "^2.4.1",
diff --git a/ui/round/src/atomic.js b/ui/round/src/atomic.js
new file mode 100644
index 0000000000..0a4f88ffe5
--- /dev/null
+++ b/ui/round/src/atomic.js
@@ -0,0 +1,17 @@
+var util = require('chessground').util;
+
+function capture(ctrl, key) {
+  var ps = [];
+  var pos = util.key2pos(key);
+  for (var x = -1; x < 2; x++) {
+    for (var y = -1; y < 2; y++) {
+      var p = util.pos2key([pos[0] + x, pos[1] + y]);
+      if (p) ps.push(p);
+    }
+  }
+  ctrl.chessground.explode(ps);
+};
+
+module.exports = {
+  capture: capture
+};
diff --git a/ui/round/src/ctrl.js b/ui/round/src/ctrl.js
index 001de68713..7be5fe0332 100644
--- a/ui/round/src/ctrl.js
+++ b/ui/round/src/ctrl.js
@@ -16,6 +16,7 @@ var replayCtrl = require('./replay/ctrl');
 var clockCtrl = require('./clock/ctrl');
 var correspondenceClockCtrl = require('./correspondenceClock/ctrl');
 var moveOn = require('./moveOn');
+var atomic = require('./atomic');
 
 module.exports = function(opts) {
 
@@ -51,12 +52,19 @@ module.exports = function(opts) {
     });
   }.bind(this);
 
-  this.userMove = function(orig, dest, meta) {
+  var onUserMove = function(orig, dest, meta) {
     hold.register(this.socket, meta.holdTime);
     if (!promotion.start(this, orig, dest, meta.premove)) this.sendMove(orig, dest);
     $.sound.move(this.data.player.color == 'white');
   }.bind(this);
 
+  var onCapture = function(key) {
+    if (this.data.game.variant.key === 'atomicChess') atomic.capture(this, key);
+    else $.sound.take();
+  }.bind(this);
+
+  this.chessground = ground.make(this.data, opts.data.game.fen, onUserMove, onCapture);
+
   this.apiMove = function(o) {
     if (this.replay.active) this.replay.vm.late = true;
     else this.chessground.apiMove(o.from, o.to);
@@ -69,8 +77,6 @@ module.exports = function(opts) {
     if (game.isPlayerPlaying(this.data) && o.color === this.data.player.color) this.moveOn.next();
   }.bind(this);
 
-  this.chessground = ground.make(this.data, opts.data.game.fen, this.userMove);
-
   this.reload = function(cfg) {
     this.replay.onReload(cfg);
     this.data = data(this.data, cfg);
diff --git a/ui/round/src/ground.js b/ui/round/src/ground.js
index 0eb1289bcd..73d76c86a3 100644
--- a/ui/round/src/ground.js
+++ b/ui/round/src/ground.js
@@ -39,18 +39,18 @@ function makeConfig(data, fen, flip) {
     },
     draggable: {
       showGhost: data.pref.highlight
-    },
-    events: {
-      capture: $.sound.take
     }
   };
 }
 
-function make(data, fen, userMove) {
+function make(data, fen, userMove, onCapture) {
   var config = makeConfig(data, fen);
   config.movable.events = {
     after: userMove
   };
+  config.events = {
+    capture: onCapture
+  };
   config.viewOnly = data.player.spectator;
   return new chessground.controller(config);
 }