static get CAMEL() { return 'c'; }
static get WILDEBEEST() { return 'w'; }
- static get PIECES() {
+ static get PIECES()
+ {
return ChessRules.PIECES.concat([V.CAMEL,V.WILDEBEEST]);
}
- static get steps() {
+ static get steps()
+ {
return Object.assign(
ChessRules.steps, //add camel moves:
{'c': [ [-3,-1],[-3,1],[-1,-3],[-1,3],[1,-3],[1,3],[3,-1],[3,1] ]}
);
}
+ static IsGoodEnpassant(enpassant)
+ {
+ 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;
+ }
+
+ // There may be 2 enPassant squares (if pawn jump 3 squares)
+ getEnpassantFen()
+ {
+ const L = this.epSquares.length;
+ if (!this.epSquares[L-1])
+ return "-"; //no en-passant
+ let res = "";
+ this.epSquares[L-1].forEach(sq => {
+ res += V.CoordsToSquare(sq) + ",";
+ });
+ return res.slice(0,-1); //remove last comma
+ }
+
// En-passant after 2-sq or 3-sq jumps
- getEpSquare(move)
+ getEpSquare(moveOrSquare)
{
+ if (!moveOrSquare)
+ return undefined;
+ if (typeof moveOrSquare === "string")
+ {
+ const square = moveOrSquare;
+ if (square == "-")
+ return undefined;
+ let res = [];
+ square.split(",").forEach(sq => {
+ res.push(V.SquareToCoords(sq));
+ });
+ return res;
+ }
+ // Argument is a move:
+ const move = moveOrSquare;
const [sx,sy,ex] = [move.start.x,move.start.y,move.end.x];
if (this.getPiece(sx,sy) == V.PAWN && Math.abs(sx - ex) >= 2)
{
// TODO: some redundant checks
if (epsq.x == x+shift && 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], [x+shift,epsq.y]);
enpassantMove.vanish.push({
x: x,
- y: y+epStep,
+ y: epsq.y,
p: 'p',
- c: this.getColor(x,y+epStep)
+ c: this.getColor(x,epsq.y)
});
moves.push(enpassantMove);
}
pieces[c][knight2Pos] = 'n';
pieces[c][rook2Pos] = 'r';
}
- let fen = pieces["b"].join("") +
+ return pieces["b"].join("") +
"/ppppppppppp/11/11/11/11/11/11/PPPPPPPPPPP/" +
pieces["w"].join("").toUpperCase() +
- " 1111";
- return fen;
+ " w 1111 -";
}
}
+
+const VariantRules = WildebeestRules;