import { ArrayFun } from "@/utils/array";
import { randInt, shuffle } from "@/utils/alea";
-export const VariantRules = class RoyalraceRules extends ChessRules {
+export class RoyalraceRules extends ChessRules {
+
static get HasFlags() {
return false;
}
return { x: 11, y: 11 };
}
- static GenRandInitFen() {
+ getPpath(b) {
+ return (b[1] == V.KNIGHT ? "Enpassant/" : "") + b;
+ }
+
+ static GenRandInitFen(randomness) {
+ if (randomness == 0)
+ return "92/92/92/92/92/92/92/92/92/qrbnp1PNBRQ/krbnp1PNBRK w 0";
+
let pieces = { w: new Array(10), b: new Array(10) };
// Shuffle pieces on first and second rank
for (let c of ["w", "b"]) {
+ if (c == 'b' && randomness == 1) {
+ pieces['b'] = JSON.parse(JSON.stringify(pieces['w'])).reverse();
+ pieces['b'] =
+ pieces['b'].splice(5,10).reverse().concat(
+ pieces['b'].splice(0,5).reverse());
+ break;
+ }
+
// Reserve 4 and 5 which are pawns positions
let positions = ArrayFun.range(10).filter(i => i != 4 && i != 5);
const whiteFen = pieces["w"].join("").toUpperCase();
const blackFen = pieces["b"].join("");
return (
- "11/11/11/11/11/11/11/11/11/" +
- whiteFen.substr(5).split("").reverse().join("") +
- "1" +
+ "92/92/92/92/92/92/92/92/92/" +
blackFen.substr(5).split("").reverse().join("") +
+ "1" +
+ whiteFen.substr(5).split("").join("") +
"/" +
- whiteFen.substr(0,5) + "1" + blackFen.substr(0,5) +
+ blackFen.substr(0,5) +
+ "1" +
+ whiteFen.substr(0,5).split("").reverse().join("") +
" w 0"
);
}
return m.vanish.length == 1;
});
- // Captures
- const shiftX = -1;
- for (let shiftY of [-1, 1]) {
- if (
- V.OnBoard(x + shiftX, y + shiftY) &&
- 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]));
+ // Captures (in both directions)
+ for (let shiftX of [-1, 1]) {
+ for (let shiftY of [-1, 1]) {
+ if (
+ V.OnBoard(x + shiftX, y + shiftY) &&
+ 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]));
+ }
}
}
return this.getSlideNJumpMoves(sq, V.steps[V.KNIGHT]);
}
- // What are the king moves from square x,y ?
- getPotentialKingMoves(sq) {
- return this.getSlideNJumpMoves(
- sq,
- V.steps[V.ROOK].concat(V.steps[V.BISHOP]),
- "oneStep"
- );
- }
-
filterValid(moves) {
if (moves.length == 0) return [];
const color = this.turn;
});
}
- isAttackedByPawn([x, y], colors) {
- const pawnShift = 1;
- if (x + pawnShift < V.size.x) {
- for (let c of colors) {
+ isAttackedByPawn([x, y], color) {
+ // Pawns can capture forward and backward:
+ for (let pawnShift of [-1, 1]) {
+ if (0 < x + pawnShift && x + pawnShift < V.size.x) {
for (let i of [-1, 1]) {
if (
y + i >= 0 &&
y + i < V.size.y &&
this.getPiece(x + pawnShift, y + i) == V.PAWN &&
- this.getColor(x + pawnShift, y + i) == c
+ this.getColor(x + pawnShift, y + i) == color
) {
return true;
}
return false;
}
- isAttackedByKnight(sq, colors) {
+ isAttackedByKnight(sq, color) {
return this.isAttackedBySlideNJump(
sq,
- colors,
+ color,
V.KNIGHT,
V.steps[V.KNIGHT]
);
if (this.kingPos[color][0] == 0)
// The opposing edge is reached!
return color == "w" ? "1-0" : "0-1";
- return "*";
+ if (this.atLeastOneMove()) return "*";
+ // Stalemate (will probably never happen)
+ return "1/2";
}
static get SEARCH_DEPTH() {
V.CoordsToSquare(move.end)
);
}
+
};