import { ChessRules, PiPo, Move } from "@/base_rules";
-export const VariantRules = class SuctionRules extends ChessRules {
+export class SuctionRules extends ChessRules {
static get HasFlags() {
return false;
}
}
static ParseFen(fen) {
- return Object.assign({}, ChessRules.ParseFen(fen), {
- cmove: fen.split(" ")[4]
- });
+ return Object.assign(
+ ChessRules.ParseFen(fen),
+ { cmove: fen.split(" ")[4] }
+ );
}
static IsGoodFen(fen) {
if (!ChessRules.IsGoodFen(fen)) return false;
const fenParts = fen.split(" ");
- if (fenParts.length != 6) return false;
- if (fenParts[5] != "-" && !fenParts[5].match(/^([a-h][1-8]){2}$/))
+ if (fenParts.length != 5) return false;
+ if (fenParts[4] != "-" && !fenParts[4].match(/^([a-h][1-8]){2}$/))
return false;
return true;
}
return mv;
}
- getPotentialPawnMoves([x, y]) {
- const color = this.turn;
+ getEnpassantCaptures([x, y], shiftX) {
let moves = [];
- const [sizeX, sizeY] = [V.size.x, V.size.y];
- const shiftX = color == "w" ? -1 : 1;
- const startRank = color == "w" ? sizeX - 2 : 1;
- const firstRank = color == "w" ? sizeX - 1 : 0;
-
- if (x + shiftX >= 0 && x + shiftX < sizeX) {
- // One square forward
- if (this.board[x + shiftX][y] == V.EMPTY) {
- moves.push(
- this.getBasicMove([x, y], [x + shiftX, y], {
- c: color,
- p: "p"
- })
- );
- 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]));
- }
- }
- // Swaps
- 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])
- ) {
- moves.push(
- this.getBasicMove([x, y], [x + shiftX, y + shiftY], {
- c: color,
- p: "p"
- })
- );
- }
- }
- }
-
- // En passant
const Lep = this.epSquares.length;
const epSquare = this.epSquares[Lep - 1]; //always at least one element
if (
Math.abs(epSquare.y - y) == 1
) {
let enpassantMove = this.getBasicMove([x, y], [epSquare.x, epSquare.y]);
- const oppCol = V.GetOppCol(color);
+ const oppCol = V.GetOppCol(this.turn);
enpassantMove.vanish.push({
x: x,
y: epSquare.y,
});
moves.push(enpassantMove);
}
-
return moves;
}
// Does m2 un-do m1 ? (to disallow undoing captures)
oppositeMoves(m1, m2) {
return (
- m1 &&
+ !!m1 &&
m2.vanish.length == 2 &&
m1.start.x == m2.start.x &&
m1.end.x == m2.end.x &&
getCurrentScore() {
const color = this.turn;
const kp = this.kingPos[color];
- if (color == "w" && kp[0] == 0)
- return "0-1";
- if (color == "b" && kp[0] == V.size.x - 1)
- return "1-0";
+ if (color == "w" && kp[0] == 0) return "0-1";
+ if (color == "b" && kp[0] == V.size.x - 1) return "1-0";
// King is not on the opposite edge: game not over
return "*";
}