import { ArrayFun } from "@/utils/array";
import { randInt } from "@/utils/alea";
-export const VariantRules = class GrasshopperRules extends ChessRules {
+export class GrasshopperRules extends ChessRules {
+
static get HasEnpassant() {
return false;
}
+ static get PawnSpecs() {
+ return Object.assign(
+ {},
+ ChessRules.PawnSpecs,
+ { promotions: ChessRules.PawnSpecs.promotions.concat([V.GRASSHOPPER]) }
+ );
+ }
+
static get GRASSHOPPER() {
return "g";
}
}
}
- getPotentialPawnMoves([x, y]) {
- const color = this.turn;
- let moves = [];
- const [sizeX, sizeY] = [V.size.x, V.size.y];
- const shiftX = color == "w" ? -1 : 1;
- const lastRank = color == "w" ? 0 : sizeX - 1;
-
- const finalPieces =
- x + shiftX == lastRank
- ? [V.ROOK, V.KNIGHT, V.BISHOP, V.QUEEN, V.GRASSHOPPER]
- : [V.PAWN];
- if (this.board[x + shiftX][y] == V.EMPTY) {
- // One square forward
- for (let piece of finalPieces) {
- moves.push(
- this.getBasicMove([x, y], [x + shiftX, y], {
- c: color,
- p: piece
- })
- );
- }
- // No 2-squares jump
- }
- // Captures
- 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])
- ) {
- for (let piece of finalPieces) {
- moves.push(
- this.getBasicMove([x, y], [x + shiftX, y + shiftY], {
- c: color,
- p: piece
- })
- );
- }
- }
- }
-
- return moves;
- }
-
getPotentialGrasshopperMoves([x, y]) {
let moves = [];
// Look in every direction until an obstacle (to jump) is met
return moves;
}
- isAttacked(sq, colors) {
+ isAttacked(sq, color) {
return (
- super.isAttacked(sq, colors) ||
- this.isAttackedByGrasshopper(sq, colors)
+ super.isAttacked(sq, color) ||
+ this.isAttackedByGrasshopper(sq, color)
);
}
- isAttackedByGrasshopper([x, y], colors) {
+ isAttackedByGrasshopper([x, y], color) {
// Reversed process: is there an adjacent obstacle,
// and a grasshopper next in the same line?
for (const step of V.steps[V.ROOK].concat(V.steps[V.BISHOP])) {
if (
V.OnBoard(i, j) &&
this.getPiece(i, j) == V.GRASSHOPPER &&
- colors.includes(this.getColor(i, j))
+ this.getColor(i, j) == color
) {
return true;
}
"/gggggggg/pppppppp/8/8/PPPPPPPP/GGGGGGGG/"
);
}
+
};