//add en passant, add castling var xkeys={"a":0, "b":1, "c":2,"d":3,"e":4, "f":5, "g":6, "h":7}; var ykeys={ "1":7, "2":6, "3":5,"4":4,"5":3,"6":2,"7":1,"8":0 }; var xpos=["a","b","c","d","e","f","g","h"]; var ypos=["8","7","6","5","4","3","2","1"]; //knight object var knight1 = { name: "knight1", type: "Black", icon: "♞", coordinates:"a8", position: [1,0],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getknightmoves(this); }, move: function(to){ this.moves.length = 0 this.findmoves(); return movechesspiece(this,to); } } var knight2 = { name: "knight2", type: "Black", icon: "♞", coordinates:"g8", position: [6,0],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getknightmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); return movechesspiece(this,to); } } var knight3 = { name: "knight3", type: "White", icon: "♘", coordinates:"b1", position: [1,7],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getknightmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); return movechesspiece(this,to); } } var knight4 = { name: "knight4", type: "White", icon: "♘", coordinates:"g1", position: [6,7],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getknightmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); return movechesspiece(this,to); } } function movechesspiece(piece,to,check=""){ if(piece.moves.includes(to[0]+""+to[1])||check=="check"){ chessboard[piece.position[1]][piece.position[0]]=""; var squarefrom=document.getElementById(piece.position[0]+""+piece.position[1]); squarefrom.innerHTML=""; piece.position=to; piece.coordinates=positionconvert(to); chessboard[to[1]][to[0]]=piece.name; var squareto=document.getElementById(to[0]+""+to[1]); squareto.innerHTML=piece.icon; piece.moves.length = 0 piece.findmoves(); return "legal"; }else{return "illegal";} } var pawn1 = { name: "pawn1", type: "Black", icon: "♟️", coordinates:"a7", position: [0,1],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn2 = { name: "pawn2", type: "Black", icon: "♟️", coordinates:"b7", position: [1,1],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn3 = { name: "pawn3", type: "Black", icon: "♟️", coordinates:"c7", position: [2,1],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn4 = { name: "pawn4", type: "Black", icon: "♟️", coordinates:"d7", position: [3,1],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn5 = { name: "pawn5", type: "Black", icon: "♟️", coordinates:"e7", position: [4,1],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn6 = { name: "pawn6", type: "Black", icon: "♟️", coordinates:"f7", position: [5,1],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn7 = { name: "pawn7", type: "Black", icon: "♟️", coordinates:"g7", position: [6,1],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn8 = { name: "pawn8", type: "Black", icon: "♟️", coordinates:"h7", position: [7,1],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn9 = { name: "pawn9", type: "White", icon: "♙", coordinates:"a2", position: [0,6],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn10 = { name: "pawn10", type: "White", icon: "♙", coordinates:"b2", position: [1,6],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn11 = { name: "pawn11", type: "White", icon: "♙", coordinates:"c2", position: [2,6],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn12 = { name: "pawn12", type: "White", icon: "♙", coordinates:"d2", position: [3,6],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn13 = { name: "pawn13", type: "White", icon: "♙", coordinates:"e2", position: [4,6],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn14 = { name: "pawn14", type: "White", icon: "♙", coordinates:"f2", position: [5,6],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn15 = { name: "pawn15", type: "White", icon: "♙", coordinates:"g2", position: [6,6],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var pawn16 = { name: "pawn16", type: "White", icon: "♙", coordinates:"h2", position: [7,6],//0-7 top to bottom moves: [], attacks: [], firstmove:true, getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getpawnmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); var legal= movechesspiece(this,to); if(legal=="legal"){ this.firstmove=false;} return legal; } } var bishop1 = { name: "bishop1", type: "Black", icon: "♝", coordinates:"c8", position: [2,0],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getbishopmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); return movechesspiece(this,to); } } var bishop2 = { name: "bishop2", type: "Black", icon: "♝", coordinates:"f8", position: [5,0],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getbishopmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); return movechesspiece(this,to); } } var bishop3 = { name: "bishop3", type: "White", icon: "♗", coordinates:"c1", position: [2,7],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getbishopmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); return movechesspiece(this,to); } } var bishop4 = { name: "bishop4", type: "White", icon: "♗", coordinates:"f1", position: [5,7],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getbishopmoves(this); }, move: function(to){ this.moves.length = 0; this.findmoves(); return movechesspiece(this,to); } } var rook1 = { name: "rook1", type: "Black", icon: "♜", coordinates:"a8", position: [0,0],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getrookmoves(this); }, move: function(to){ this.moves.length = 0 this.findmoves(); return movechesspiece(this,to); } } var rook2 = { name: "rook2", type: "Black", icon: "♜", coordinates:"g8", position: [7,0],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getrookmoves(this); }, move: function(to){ this.moves.length = 0 this.findmoves(); return movechesspiece(this,to); } } var rook3 = { name: "rook3", type: "White", icon: "♖", coordinates:"a1", position: [0,7],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getrookmoves(this); }, move: function(to){ this.moves.length = 0 this.findmoves(); return movechesspiece(this,to); } } var rook4 = { name: "rook4", type: "White", icon: "♖", coordinates:"g1", position: [7,7],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getrookmoves(this); }, move: function(to){ this.moves.length = 0 this.findmoves(); return movechesspiece(this,to); } } var queen1 = { name: "queen1", type: "Black", icon: "♛", coordinates:"d8", position: [3,0],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getrookmoves(this); getbishopmoves(this); }, move: function(to){ this.moves.length = 0 this.findmoves(); return movechesspiece(this,to); } } var queen2 = { name: "queen2", type: "White", icon: "♕", coordinates:"d1", position: [3,7],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getrookmoves(this); getbishopmoves(this); }, move: function(to){ this.moves.length = 0 this.findmoves(); return movechesspiece(this,to); } } var king1 = { name: "king1", type: "Black", icon: "♚", coordinates:"e8", position: [4,0],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getkingmoves(this); }, move: function(to){ this.moves.length = 0 this.findmoves(); return movechesspiece(this,to); } } var king2 = { name: "king2", type: "White", icon: "♔", coordinates:"e1", position: [4,7],//0-7 top to bottom moves: [], attacks: [], getInfo: function () { return this.type+" "+this.name + "("+this.coordinates + ") can attack "+ this.moves.length +" squares."+ this.icon; }, findmoves: function(){ getkingmoves(this); }, move: function(to){ this.moves.length = 0 this.findmoves(); return movechesspiece(this,to); } } function getkingmoves(king){ var positionx=parseInt(king.position[0]); var positiony=parseInt(king.position[1]); x=positionx; y=positiony; x++; if(x>=0 && x<=7 && y>=0 && y<=7){ king.moves.push(x+""+y); } y++; if(x>=0 && x<=7 && y>=0 && y<=7){ king.moves.push(x+""+y); } x--; if(x>=0 && x<=7 && y>=0 && y<=7){ king.moves.push(x+""+y); } x--; if(x>=0 && x<=7 && y>=0 && y<=7){ king.moves.push(x+""+y); } y--; if(x>=0 && x<=7 && y>=0 && y<=7){ king.moves.push(x+""+y); } y--; if(x>=0 && x<=7 && y>=0 && y<=7){ king.moves.push(x+""+y); } x++; if(x>=0 && x<=7 && y>=0 && y<=7){ king.moves.push(x+""+y); } x++; if(x>=0 && x<=7 && y>=0 && y<=7){ king.moves.push(x+""+y); } king.attacks=king.moves.slice(); } function getbishopmoves(bishop){ var positionx=parseInt(bishop.position[0]); var positiony=parseInt(bishop.position[1]); x=positionx; y=positiony; for(var i=0;i<7;i++){ x++; y++; if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]!=""){ bishop.moves.push(x+""+y); break;} bishop.moves.push(x+""+y); } } x=positionx; y=positiony; for(var i=0;i<7;i++){ x--; y++; if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]!=""){ bishop.moves.push(x+""+y); break;} bishop.moves.push(x+""+y); } } x=positionx; y=positiony; for(var i=0;i<7;i++){ x++; y--; if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]!=""){ bishop.moves.push(x+""+y); break;} bishop.moves.push(x+""+y); } } x=positionx; y=positiony; for(var i=0;i<7;i++){ x--; y--; if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]!=""){ bishop.moves.push(x+""+y); break;} bishop.moves.push(x+""+y); } } bishop.attacks=bishop.moves.slice(); } function getrookmoves(rook){ var positionx=parseInt(rook.position[0]); var positiony=parseInt(rook.position[1]); x=positionx; y=positiony; for(var i=0;i<7;i++){ x++; if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]!=""){ rook.moves.push(x+""+y); break; } rook.moves.push(x+""+y); } } x=positionx; y=positiony; for(var i=0;i<7;i++){ y++; if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]!=""){ rook.moves.push(x+""+y); break; } rook.moves.push(x+""+y); } } x=positionx; y=positiony; for(var i=0;i<7;i++){ y--; if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]!=""){ rook.moves.push(x+""+y); break; } rook.moves.push(x+""+y); } } x=positionx; y=positiony; for(var i=0;i<7;i++){ x--; if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]!=""){ rook.moves.push(x+""+y); break; } rook.moves.push(x+""+y); } } rook.attacks=rook.moves.slice(); } function getknightmoves(knight){ var y=parseInt(knight.position[1])+1; var x=parseInt(knight.position[0])+2; if(x>=0 && x<=7 && y>=0 && y<=7){ knight.moves.push(x+""+y); } y=parseInt(knight.position[1])+1; x=parseInt(knight.position[0])-2; if(x>=0 && x<=7 && y>=0 && y<=7){ knight.moves.push(x+""+y); } y=parseInt(knight.position[1])-1; x=parseInt(knight.position[0])+2; if(x>=0 && x<=7 && y>=0 && y<=7){ knight.moves.push(x+""+y); } y=parseInt(knight.position[1])-1; x=parseInt(knight.position[0])-2; if(x>=0 && x<=7 && y>=0 && y<=7){ knight.moves.push(x+""+y); } var y=parseInt(knight.position[1])+2; var x=parseInt(knight.position[0])+1; if(x>=0 && x<=7 && y>=0 && y<=7){ knight.moves.push(x+""+y); } y=parseInt(knight.position[1])+2; x=parseInt(knight.position[0])-1; if(x>=0 && x<=7 && y>=0 && y<=7){ knight.moves.push(x+""+y); } y=parseInt(knight.position[1])-2; x=parseInt(knight.position[0])+1; if(x>=0 && x<=7 && y>=0 && y<=7){ knight.moves.push(x+""+y); } y=parseInt(knight.position[1])-2; x=parseInt(knight.position[0])-1; if(x>=0 && x<=7 && y>=0 && y<=7){ knight.moves.push(x+""+y); } knight.attacks=knight.moves.slice(); } function getpawnmoves(pawn){ var y=parseInt(pawn.position[1]); var yincrement=0; if(pawn.type=="White"){ yincrement=-1; }else{ yincrement=1; } y+=yincrement; var x=parseInt(pawn.position[0]); if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]!=""){ }else{ pawn.moves.push(x+""+y);} } y+=yincrement; if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]!=""){ }else if(chessboard[y-yincrement][x]=="" && pawn.firstmove==true){ pawn.moves.push(x+""+y); } } y-=yincrement; x+=1; if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]==""){ }else{ pawn.moves.push(x+""+y);} } x-=2; if(x>=0 && x<=7 && y>=0 && y<=7){ if(chessboard[y][x]==""){ }else{ pawn.moves.push(x+""+y);} } pawn.attacks.length=0; if(x>=0 && x<=7 && y>=0 && y<=7){ pawn.attacks.push(x+""+y); } x+=2; if(x>=0 && x<=7 && y>=0 && y<=7){ pawn.attacks.push(x+""+y); } } var chessboard=[ ["rook1","knight1","bishop1","queen1","king1","bishop2","knight2","rook2"], ["pawn1","pawn2","pawn3","pawn4","pawn5","pawn6","pawn7","pawn8"], ["","","","","","","",""], ["","","","","","","",""], ["","","","","","","",""], ["","","","","","","",""], ["pawn9","pawn10","pawn11","pawn12","pawn13","pawn14","pawn15","pawn16"], ["rook3","knight3","bishop3","queen2","king2","bishop4","knight4","rook4"] ]; var picked="";//chess piece that is picked up, chosen to move var pickflag=false; var turn="White"; window.onload=function(){ knight1.findmoves(); knight2.findmoves(); knight3.findmoves(); knight4.findmoves(); bishop1.findmoves(); bishop2.findmoves(); bishop3.findmoves(); bishop4.findmoves(); rook1.findmoves(); rook2.findmoves(); rook3.findmoves(); rook4.findmoves(); queen1.findmoves(); queen2.findmoves(); king1.findmoves(); king2.findmoves(); pawn1.findmoves(); pawn2.findmoves(); pawn3.findmoves(); pawn4.findmoves(); pawn5.findmoves(); pawn6.findmoves(); pawn7.findmoves(); pawn8.findmoves(); pawn9.findmoves(); pawn10.findmoves(); pawn11.findmoves(); pawn12.findmoves(); pawn13.findmoves(); pawn14.findmoves(); pawn15.findmoves(); pawn16.findmoves(); } function pickdrop(square){ if(pickflag==false && chessboard[square[1]][square[0]]!=""){ picked=eval(chessboard[square[1]][square[0]]); // console.log(picked.name); if(picked.type==turn){ pickflag=true;}else{picked="";} }else if(picked!=""){ if(chessboard[square[1]][square[0]]!=""){ if(eval(chessboard[square[1]][square[0]]).type==picked.type){ picked=""; pickflag=false; }else{ drop(square); } }else{ drop(square);} } } function pick(chesspiece){ picked=chesspiece; } function drop(to){ var from=picked.position; var tocontent=chessboard[to[1]][to[0]]; var legal=picked.move([to[0],to[1]]); var check=""; check=querycheck(picked.type);//verify if last move caused self check. if(check=="check"){ movechesspiece(picked,from[0]+""+from[1],check);//move back piece to origine. //reset what was in to position chessboard[to[1]][to[0]]=tocontent; if(tocontent!=""){document.getElementById(to).innerHTML=eval(tocontent+".icon");} //cancel en passant //cancel rook //cancel promotion }else{ document.getElementById("out").innerHTML=picked.getInfo(); if(picked.type=="Black" && legal=="legal"){ turn="White"; }else if(picked.type=="White" && legal=="legal" ){ turn="Black"; } } pickflag=false; picked=""; } function querycheck(color){ if(color=="White"){ var wkingpos=king2.position; var blacksmoves=[]; blacksmoves.length =0; var blacks=["knight1","knight2","bishop1","bishop2","rook1","rook2","queen1","king1","pawn1","pawn2","pawn3","pawn4","pawn5","pawn6","pawn7","pawn8"]; for(var i=0;i<8;i++){ for(var j=0;j<8;j++){ if(blacks.includes(chessboard[i][j])){ eval(chessboard[i][j]).findmoves(); blacksmoves=blacksmoves.concat(eval(chessboard[i][j]).attacks ); eval(chessboard[i][j]).moves.length=0; eval(chessboard[i][j]).attacks.length=0; } } } if(blacksmoves.includes(wkingpos[0]+""+wkingpos[1])){ return "check"; } } if(color=="Black"){ var bkingpos=king1.position; var whitesmoves=[]; var whites=["knight3","knight4","bishop3","bishop4","rook3","rook4","queen2","king2", "pawn9","pawn10","pawn11","pawn12","pawn13","pawn14","pawn15","pawn16"]; for(var i=0;i<8;i++){ for(var j=0;j<8;j++){ if(whites.includes(chessboard[i][j])){ eval(chessboard[i][j]).findmoves(); whitesmoves=whitesmoves.concat(eval(chessboard[i][j]).attacks); eval(chessboard[i][j]).moves.length=0; eval(chessboard[i][j]).attacks.length=0; } } } if(whitesmoves.includes(bkingpos[0]+""+bkingpos[1])){ return "check"; } } } function coordsconvert(coordinates){ var x= xkeys[coordinates[0]]; var y= ykeys[coordinates[1]]; return x+""+y; } function positionconvert(position){ return xpos[position[0]]+""+ypos[position[1]]; } var flipp="180"; function flip(){ var cells= document.getElementsByTagName("td"); for (var i=0;i

chess2