return (Object.keys(V.ALICE_PIECES).includes(b[1]) ? "Alice/" : "") + b;
}
+ getEpSquare(moveOrSquare) {
+ if (!moveOrSquare) return undefined;
+ if (typeof moveOrSquare === "string") {
+ const square = moveOrSquare;
+ if (square == "-") return undefined;
+ return V.SquareToCoords(square);
+ }
+ // Argument is a move:
+ const move = moveOrSquare;
+ const s = move.start,
+ e = move.end;
+ if (
+ s.y == e.y &&
+ Math.abs(s.x - e.x) == 2 &&
+ // Special conditions: a pawn can be on the other side
+ ['p','s'].includes(move.appear[0].p) &&
+ ['p','s'].includes(move.vanish[0].p)
+ ) {
+ return {
+ x: (s.x + e.x) / 2,
+ y: s.y
+ };
+ }
+ return undefined; //default
+ }
+
setOtherVariables(fen) {
super.setOtherVariables(fen);
const rows = V.ParseFen(fen).position.split("/");
return res;
}
+ getEnpassantCaptures([x, y], shiftX) {
+ const Lep = this.epSquares.length;
+ const epSquare = this.epSquares[Lep - 1]; //always at least one element
+ let enpassantMove = null;
+ if (
+ !!epSquare &&
+ epSquare.x == x + shiftX &&
+ Math.abs(epSquare.y - y) == 1
+ ) {
+ enpassantMove = this.getBasicMove([x, y], [epSquare.x, epSquare.y]);
+ // May capture in same world or different:
+ const capturedPiece =
+ this.board[x][epSquare.y] != V.EMPTY
+ ? this.getPiece(x, epSquare.y)
+ : ['p','s'][1 - "ps".indexOf(this.getPiece(x, y))];
+ enpassantMove.vanish.push({
+ x: x,
+ y: epSquare.y,
+ p: capturedPiece,
+ c: V.GetOppCol(this.turn)
+ });
+ }
+ return !!enpassantMove ? [enpassantMove] : [];
+ }
+
filterValid(moves, sideBoard) {
if (moves.length == 0) return [];
if (!sideBoard) sideBoard = [this.getSideBoard(1), this.getSideBoard(2)];