const startRank = (color == "w" ? sizeX-2 : 1);
const lastRank = (color == "w" ? 0 : sizeX-1);
const pawnColor = this.getColor(x,y); //can be different for checkered
+ const finalPieces = x + shiftX == lastRank
+ ? [V.ROOK,V.KNIGHT,V.BISHOP,V.QUEEN]
+ : [V.PAWN];
- if (x+shiftX >= 0 && x+shiftX < sizeX) //TODO: always true
+ // One square forward
+ if (this.board[x+shiftX][y] == V.EMPTY)
{
- const finalPieces = x + shiftX == lastRank
- ? [V.ROOK,V.KNIGHT,V.BISHOP,V.QUEEN]
- : [V.PAWN]
- // One square forward
- if (this.board[x+shiftX][y] == V.EMPTY)
+ for (let piece of finalPieces)
{
- for (let piece of finalPieces)
- {
- moves.push(this.getBasicMove([x,y], [x+shiftX,y],
- {c:pawnColor,p:piece}));
- }
- // Next condition because pawns on 1st rank can generally jump
- if ([startRank,firstRank].includes(x)
- && this.board[x+2*shiftX][y] == V.EMPTY)
- {
- // Two squares jump
- moves.push(this.getBasicMove([x,y], [x+2*shiftX,y]));
- }
+ moves.push(this.getBasicMove([x,y], [x+shiftX,y],
+ {c:pawnColor,p:piece}));
}
- // Captures
- for (let shiftY of [-1,1])
+ // Next condition because pawns on 1st rank can generally jump
+ if ([startRank,firstRank].includes(x)
+ && this.board[x+2*shiftX][y] == V.EMPTY)
{
- if (y + shiftY >= 0 && y + shiftY < sizeY
- && this.board[x+shiftX][y+shiftY] != V.EMPTY
- && this.canTake([x,y], [x+shiftX,y+shiftY]))
+ // Two squares jump
+ moves.push(this.getBasicMove([x,y], [x+2*shiftX,y]));
+ }
+ }
+ // Captures
+ for (let shiftY of [-1,1])
+ {
+ if (y + shiftY >= 0 && y + shiftY < sizeY
+ && this.board[x+shiftX][y+shiftY] != V.EMPTY
+ && this.canTake([x,y], [x+shiftX,y+shiftY]))
+ {
+ for (let piece of finalPieces)
{
- for (let piece of finalPieces)
- {
- moves.push(this.getBasicMove([x,y], [x+shiftX,y+shiftY],
- {c:pawnColor,p:piece}));
- }
+ moves.push(this.getBasicMove([x,y], [x+shiftX,y+shiftY],
+ {c:pawnColor,p:piece}));
}
}
}
{
if (this.subTurn == 1 || (epSqs.length == 2 &&
// Was this en-passant capture already played at subturn 1 ?
+ // (Or maybe the opponent filled the en-passant square with a piece)
this.board[epSqs[0].x][epSqs[0].y] != V.EMPTY))
{
if (sq.x == x+shiftX && Math.abs(sq.y - y) == 1)
play(move, ingame)
{
-// console.log("play " + this.getNotation(move));
-// console.log(this.turn + " "+ this.subTurn);
if (!!ingame)
+ {
move.notation = [this.getNotation(move), this.getLongNotation(move)];
+ // In this special case, we also need the "move color":
+ move.color = this.turn;
+ }
move.flags = JSON.stringify(this.aggregateFlags());
let lastEpsq = this.epSquares[this.epSquares.length-1];
const epSq = this.getEpSquare(move);
this.updateVariables(move);
if (!!ingame)
move.hash = hex_md5(this.getFen());
- //console.log(move.checkOnSubturn1 + " " +this.turn + " "+ this.subTurn);
}
undo(move)
}
this.moves.pop();
this.unupdateVariables(move);
-// console.log("UNDO " + this.getNotation(move));
-// console.log(this.turn + " "+ this.subTurn);
}
// NOTE: GenRandInitFen() is OK,
// No alpha-beta here, just adapted min-max at depth 2(+1)
getComputerMove()
{
+ if (this.subTurn == 2)
+ return null; //TODO: imperfect interface setup
+
const maxeval = V.INFINITY;
const color = this.turn;
const oppCol = this.getOppCol(this.turn);
-
+//if (this.moves.length == 25)
+// debugger;
+console.log("turn before " + this.turn + " " + this.subTurn);
// Search best (half) move for opponent turn
const getBestMoveEval = () => {
let moves = this.getAllValidMoves();
};
let moves11 = this.getAllValidMoves();
+console.log("turn after " + this.turn + " " + this.subTurn);
+
+if (this.moves.length == 25)
+ debugger;
+
+
let doubleMoves = [];
// Rank moves using a min-max at depth 2
for (let i=0; i<moves11.length; i++)
{
- moves11[i].eval = (color=="w" ? -1 : 1) * maxeval;
this.play(moves11[i]);
if (this.turn != color)
{
moves:[moves11[i],moves12[j]],
eval:getBestMoveEval()});
this.undo(moves12[j]);
+ console.log("------ after undo of " + this.getNotation(moves12[j]) + " " + this.turn + " " + this.subTurn);
}
}
this.undo(moves11[i]);
+
+ console.log("after undo of " + this.getNotation(moves11[i]) + " " + this.turn + " " + this.subTurn);
+
}
+console.log("turn interm " + this.turn + " " + this.subTurn);
+
+ for (let i=0; i<doubleMoves.length; i++)
+ {
+ if (doubleMoves[i].moves.length == 2)
+ {
+ if (this.moves.length == 1
+ && this.getNotation(doubleMoves[i].moves[0])=="a5"
+ && this.getNotation(doubleMoves[i].moves[1])=="h6")
+ {
+ return doubleMoves[i].moves;
+ }
+ if (this.moves.length == 5
+ && this.getNotation(doubleMoves[i].moves[0])=="c6"
+ && this.getNotation(doubleMoves[i].moves[1])=="Kc7")
+ {
+ return doubleMoves[i].moves;
+ }
+ if (this.moves.length == 9
+ && this.getNotation(doubleMoves[i].moves[0])=="d6"
+ && this.getNotation(doubleMoves[i].moves[1])=="dxe5")
+ {
+ return doubleMoves[i].moves;
+ }
+ if (this.moves.length == 13
+ && this.getNotation(doubleMoves[i].moves[0])=="fxe6"
+ && this.getNotation(doubleMoves[i].moves[1])=="Rxf1")
+ {
+ return doubleMoves[i].moves;
+ }
+ if (this.moves.length == 17
+ && this.getNotation(doubleMoves[i].moves[0])=="Nb6"
+ && this.getNotation(doubleMoves[i].moves[1])=="Bg6")
+ {
+ return doubleMoves[i].moves;
+ }
+ if (this.moves.length == 21
+ && this.getNotation(doubleMoves[i].moves[0])=="Bxe4"
+ && this.getNotation(doubleMoves[i].moves[1])=="Nxd3") //Bxd3
+ {
+ return doubleMoves[i].moves;
+ }
+ if (this.moves.length == 25
+ && this.getNotation(doubleMoves[i].moves[0])=="Na4"
+ && this.getNotation(doubleMoves[i].moves[1])=="xb6") //Nxb6
+ {
+ debugger;
+ return doubleMoves[i].moves;
+ }
+ }
+ }
+console.log("turn intermBIS " + this.turn + " " + this.subTurn);
doubleMoves.sort( (a,b) => {
return (color=="w" ? 1 : -1) * (b.eval - a.eval); });
{
candidates.push(i);
}
+console.log("turn END " + this.turn + " " + this.subTurn);
+
const selected = doubleMoves[_.sample(candidates, 1)].moves;
if (selected.length == 1)
return selected[0];
return selected;
}
+
+ getPGN(mycolor, score, fenStart, mode)
+ {
+ let pgn = "";
+ pgn += '[Site "vchess.club"]<br>';
+ const opponent = mode=="human" ? "Anonymous" : "Computer";
+ pgn += '[Variant "' + variant + '"]<br>';
+ pgn += '[Date "' + getDate(new Date()) + '"]<br>';
+ pgn += '[White "' + (mycolor=='w'?'Myself':opponent) + '"]<br>';
+ pgn += '[Black "' + (mycolor=='b'?'Myself':opponent) + '"]<br>';
+ pgn += '[FenStart "' + fenStart + '"]<br>';
+ pgn += '[Fen "' + this.getFen() + '"]<br>';
+ pgn += '[Result "' + score + '"]<br><br>';
+
+ let counter = 1;
+ let i = 0;
+ while (i < this.moves.length)
+ {
+ pgn += (counter++) + ".";
+ for (let color of ["w","b"])
+ {
+ let move = "";
+ while (i < this.moves.length && this.moves[i].color == color)
+ move += this.moves[i++].notation[0] + ",";
+ move = move.slice(0,-1); //remove last comma
+ pgn += move + (i < this.moves.length-1 ? " " : "");
+ }
+ }
+ pgn += "<br><br>";
+
+ // "Complete moves" PGN (helping in ambiguous cases)
+ counter = 1;
+ i = 0;
+ while (i < this.moves.length)
+ {
+ pgn += (counter++) + ".";
+ for (let color of ["w","b"])
+ {
+ let move = "";
+ while (i < this.moves.length && this.moves[i].color == color)
+ move += this.moves[i++].notation[1] + ",";
+ move = move.slice(0,-1); //remove last comma
+ pgn += move + (i < this.moves.length-1 ? " " : "");
+ }
+ }
+
+ return pgn;
+ }
}
const VariantRules = MarseilleRules;
projects / vchess.git / blobdiff