return false;
const fenParsed = V.ParseFen(fen);
// 5) Check captures
- if (!fenParsed.captured || !fenParsed.captured.match(/^[0-9]{10,10}$/))
+ if (!fenParsed.captured || !fenParsed.captured.match(/^[0-9]{14,14}$/))
return false;
return true;
}
- static GenRandInitFen()
+ static IsGoodEnpassant(enpassant)
{
- const fen = ChessRules.GenRandInitFen();
- return fen.replace(" w 1111", " w 1111 0000000000");
+ if (enpassant != "-")
+ {
+ const squares = enpassant.split(",");
+ if (squares.length > 2)
+ return false;
+ for (let sq of squares)
+ {
+ const ep = V.SquareToCoords(sq);
+ if (isNaN(ep.x) || !V.OnBoard(ep))
+ return false;
+ }
+ }
+ return true;
+ }
+
+ static ParseFen(fen)
+ {
+ const fenParts = fen.split(" ");
+ return Object.assign(
+ ChessRules.ParseFen(fen),
+ { captured: fenParts[5] }
+ );
}
getFen()
getCapturedFen()
{
- let counts = _.map(_.range(10), 0);
- for (let i=0; i<V.PIECES.length; i++)
+ let counts = _.map(_.range(14), 0);
+ let i = 0;
+ for (let j=0; j<V.PIECES.length; j++)
{
+ if (V.PIECES[j] == V.KING) //no king captured
+ continue;
counts[i] = this.captured["w"][V.PIECES[i]];
- counts[5+i] = this.captured["b"][V.PIECES[i]];
+ counts[7+i] = this.captured["b"][V.PIECES[i]];
+ i++;
}
return counts.join("");
}
[V.KNIGHT]: parseInt(fenParsed.captured[2]),
[V.BISHOP]: parseInt(fenParsed.captured[3]),
[V.QUEEN]: parseInt(fenParsed.captured[4]),
+ [V.MARSHALL]: parseInt(fenParsed.captured[5]),
+ [V.CARDINAL]: parseInt(fenParsed.captured[6]),
},
"b":
{
- [V.PAWN]: parseInt(fenParsed.captured[5]),
- [V.ROOK]: parseInt(fenParsed.captured[6]),
- [V.KNIGHT]: parseInt(fenParsed.captured[7]),
- [V.BISHOP]: parseInt(fenParsed.captured[8]),
- [V.QUEEN]: parseInt(fenParsed.captured[9]),
+ [V.PAWN]: parseInt(fenParsed.captured[7]),
+ [V.ROOK]: parseInt(fenParsed.captured[8]),
+ [V.KNIGHT]: parseInt(fenParsed.captured[9]),
+ [V.BISHOP]: parseInt(fenParsed.captured[10]),
+ [V.QUEEN]: parseInt(fenParsed.captured[11]),
+ [V.MARSHALL]: parseInt(fenParsed.captured[12]),
+ [V.CARDINAL]: parseInt(fenParsed.captured[13]),
}
};
}
const color = this.turn;
let moves = [];
const [sizeX,sizeY] = [V.size.x,V.size.y];
- const shift = (color == "w" ? -1 : 1);
+ const shiftX = (color == "w" ? -1 : 1);
const startRanks = (color == "w" ? [sizeX-2,sizeX-3] : [1,2]);
const lastRanks = (color == "w" ? [0,1,2] : [sizeX-1,sizeX-2,sizeX-3]);
+ const promotionPieces =
+ [V.ROOK,V.KNIGHT,V.BISHOP,V.QUEEN,V.MARSHALL,V.CARDINAL];
- if (x+shift >= 0 && x+shift < sizeX && x+shift != lastRanks[0])
+ // Always x+shiftX >= 0 && x+shiftX < sizeX, because no pawns on last rank
+ let finalPieces = undefined;
+ if (lastRanks.includes(x + shiftX))
+ {
+ finalPieces = promotionPieces.filter(p => this.captured[color][p] > 0);
+ if (x + shiftX != lastRanks[0])
+ finalPieces.push(V.PAWN);
+ }
+ else
+ finalPieces = [V.PAWN];
+ if (this.board[x+shiftX][y] == V.EMPTY)
{
- // Normal moves
- if (this.board[x+shift][y] == V.EMPTY)
+ // One square forward
+ for (let piece of finalPieces)
+ moves.push(this.getBasicMove([x,y], [x+shiftX,y], {c:color,p:piece}));
+ if (startRanks.includes(x))
{
- moves.push(this.getBasicMove([x,y], [x+shift,y]));
- if (startRanks.includes(x) && this.board[x+2*shift][y] == V.EMPTY)
+ if (this.board[x+2*shiftX][y] == V.EMPTY)
{
// Two squares jump
- moves.push(this.getBasicMove([x,y], [x+2*shift,y]));
- if (x == startRanks[0] && this.board[x+3*shift][y] == V.EMPTY)
+ moves.push(this.getBasicMove([x,y], [x+2*shiftX,y]));
+ if (x==startRanks[0] && this.board[x+3*shiftX][y] == V.EMPTY)
{
- // 3-squares jump
- moves.push(this.getBasicMove([x,y], [x+3*shift,y]));
+ // Three squares jump
+ moves.push(this.getBasicMove([x,y], [x+3*shiftX,y]));
}
}
}
- // Captures
- if (y>0 && this.canTake([x,y], [x+shift,y-1])
- && this.board[x+shift][y-1] != V.EMPTY)
- {
- moves.push(this.getBasicMove([x,y], [x+shift,y-1]));
- }
- if (y<sizeY-1 && this.canTake([x,y], [x+shift,y+1])
- && this.board[x+shift][y+1] != V.EMPTY)
- {
- moves.push(this.getBasicMove([x,y], [x+shift,y+1]));
- }
}
-
- if (lastRanks.includes(x+shift))
+ // Captures
+ for (let shiftY of [-1,1])
{
- // Promotion
- let promotionPieces = [V.ROOK,V.KNIGHT,V.BISHOP,V.QUEEN,V.MARSHALL,V.CARDINAL];
- promotionPieces.forEach(p => {
- if (this.captured[color][p]==0)
- return;
- // Normal move
- if (this.board[x+shift][y] == V.EMPTY)
- moves.push(this.getBasicMove([x,y], [x+shift,y], {c:color,p:p}));
- // Captures
- if (y>0 && this.canTake([x,y], [x+shift,y-1])
- && this.board[x+shift][y-1] != V.EMPTY)
- {
- moves.push(this.getBasicMove([x,y], [x+shift,y-1], {c:color,p:p}));
- }
- if (y<sizeY-1 && this.canTake([x,y], [x+shift,y+1])
- && this.board[x+shift][y+1] != 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]))
+ {
+ for (let piece of finalPieces)
{
- moves.push(this.getBasicMove([x,y], [x+shift,y+1], {c:color,p:p}));
+ moves.push(this.getBasicMove([x,y], [x+shiftX,y+shiftY],
+ {c:color,p:piece}));
}
- });
+ }
}
// En passant
const Lep = this.epSquares.length;
- const epSquare = Lep>0 ? this.epSquares[Lep-1] : undefined;
+ const epSquare = this.epSquares[Lep-1];
if (!!epSquare)
{
for (let epsq of epSquare)
{
// TODO: some redundant checks
- if (epsq.x == x+shift && Math.abs(epsq.y - y) == 1)
+ if (epsq.x == x+shiftX && Math.abs(epsq.y - y) == 1)
{
- let epStep = epsq.y - y;
- var enpassantMove = this.getBasicMove([x,y], [x+shift,y+epStep]);
+ var enpassantMove = this.getBasicMove([x,y], [epsq.x,epsq.y]);
+ // WARNING: the captured pawn may be diagonally behind us,
+ // if it's a 3-squares jump and we take on 1st passing square
+ const px = (this.board[x][epsq.y] != V.EMPTY ? x : x - shiftX);
enpassantMove.vanish.push({
- x: x,
- y: y+epStep,
+ x: px,
+ y: epsq.y,
p: 'p',
- c: this.getColor(x,y+epStep)
+ c: this.getColor(px,epsq.y)
});
moves.push(enpassantMove);
}
updateVariables(move)
{
super.updateVariables(move);
- if (move.vanish.length==2 && move.appear.length==1 && move.vanish[1].p != V.PAWN)
+ if (move.vanish.length == 2 && move.appear.length == 1)
{
// Capture: update this.captured
this.captured[move.vanish[1].c][move.vanish[1].p]++;
}
+ if (move.vanish[0].p != move.appear[0].p)
+ {
+ // Promotion: update this.captured
+ this.captured[move.vanish[0].c][move.appear[0].p]--;
+ }
}
unupdateVariables(move)
{
super.unupdateVariables(move);
- if (move.vanish.length==2 && move.appear.length==1 && move.vanish[1].p != V.PAWN)
+ if (move.vanish.length == 2 && move.appear.length == 1)
this.captured[move.vanish[1].c][move.vanish[1].p]--;
+ if (move.vanish[0].p != move.appear[0].p)
+ this.captured[move.vanish[0].c][move.appear[0].p]++;
}
static get VALUES()
return pieces["b"].join("") +
"/pppppppppp/10/10/10/10/10/10/PPPPPPPPPP/" +
pieces["w"].join("").toUpperCase() +
- " w 1111 -";
+ " w 1111 - 00000000000000";
}
}
+
+const VariantRules = GrandRules;
projects / vchess.git / blobdiff