-// TODO: bishop OK, but queen should move vertical/horizontal and capture diagonally.
-// ==> then the pawn promotion is a real promotion (enhancement).
-
import { ChessRules } from "@/base_rules";
-export const VariantRules = class ShatranjRules extends ChessRules {
+export class ShatranjRules extends ChessRules {
static get HasFlags() {
return false;
}
return false;
}
+ static get Monochrome() {
+ return true;
+ }
+
+ static get Notoodark() {
+ return true;
+ }
+
+ static get PawnSpecs() {
+ return Object.assign(
+ {},
+ ChessRules.PawnSpecs,
+ {
+ twoSquares: false,
+ promotions: [V.QUEEN]
+ }
+ );
+ }
+
+ getPpath(b) {
+ if (b[1] == 'b') return "Shatranj/" + b;
+ return b;
+ }
+
static get ElephantSteps() {
return [
[-2, -2],
];
}
- static GenRandInitFen() {
- return ChessRules.GenRandInitFen().replace("w 1111 -", "w");
- }
-
- 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 startRank = color == "w" ? sizeX - 2 : 1;
- const lastRank = color == "w" ? 0 : sizeX - 1;
- // Promotion in minister (queen) only:
- const finalPiece = x + shiftX == lastRank ? V.QUEEN : V.PAWN;
-
- if (this.board[x + shiftX][y] == V.EMPTY) {
- // One square forward
- moves.push(
- this.getBasicMove([x, y], [x + shiftX, y], {
- c: color,
- p: finalPiece
- })
- );
- }
- // 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])
- ) {
- moves.push(
- this.getBasicMove([x, y], [x + shiftX, y + shiftY], {
- c: color,
- p: finalPiece
- })
- );
- }
- }
-
- return moves;
+ static GenRandInitFen(randomness) {
+ // Remove castle flags and en-passant indication
+ return ChessRules.GenRandInitFen(randomness).slice(0, -7);
}
getPotentialBishopMoves(sq) {
);
}
- getPotentialKingMoves(sq) {
- return this.getSlideNJumpMoves(
- sq,
- V.steps[V.ROOK].concat(V.steps[V.BISHOP]),
- "oneStep"
- );
- }
-
- isAttackedByBishop(sq, colors) {
+ isAttackedByBishop(sq, color) {
return this.isAttackedBySlideNJump(
sq,
- colors,
+ color,
V.BISHOP,
V.ElephantSteps,
"oneStep"
);
}
- isAttackedByQueen(sq, colors) {
+ isAttackedByQueen(sq, color) {
return this.isAttackedBySlideNJump(
sq,
- colors,
+ color,
V.QUEEN,
V.steps[V.BISHOP],
"oneStep"
// 2 enemy units or more: I lose
return getScoreLost();
// I don't have any piece, my opponent have one: can I take it?
- if (this.isAttacked(piecesLeft[oppCol].square, [color]))
+ if (this.isAttacked(piecesLeft[oppCol].square, color))
// Yes! But I still need to take it
return "*";
// No :(