let moves = super.getPotentialMovesFrom([x, y]);
// Expand possible moves if guarded by a knight:
- if (this.getPiece(x,y) != V.KNIGHT) {
+ const piece = this.getPiece(x,y);
+ if (piece != V.KNIGHT) {
const color = this.turn;
let guardedByKnight = false;
for (const step of V.steps[V.KNIGHT]) {
}
}
if (guardedByKnight) {
+ const lastRank = color == "w" ? 0 : V.size.x - 1;
for (const step of V.steps[V.KNIGHT]) {
if (
V.OnBoard(x+step[0],y+step[1]) &&
this.getColor(x+step[0],y+step[1]) != color
) {
- moves.push(this.getBasicMove([x,y], [x+step[0],y+step[1]]));
+ // Potential promotions:
+ const finalPieces = piece == V.PAWN && x + step[0] == lastRank
+ ? [V.ROOK, V.KNIGHT, V.BISHOP, V.QUEEN]
+ : [V.PAWN];
+ for (let p of finalPieces) {
+ moves.push(
+ this.getBasicMove([x,y], [x+step[0],y+step[1]], {
+ c: color,
+ p: p
+ })
+ );
+ }
}
}
}