import { ArrayFun } from "@/utils/array";
import { randInt } from "@/utils/alea";
-export const VariantRules = class HiddenqueenRules extends ChessRules {
+export class HiddenqueenRules extends ChessRules {
// Analyse in Hiddenqueen mode makes no sense
static get CanAnalyze() {
return false;
return 't';
}
+ static get SomeHiddenMoves() {
+ return true;
+ }
+
static get PIECES() {
- return ChessRules.PIECES.concat(Object.values(V.HIDDEN_CODE));
+ return ChessRules.PIECES.concat([V.HIDDEN_QUEEN]);
}
getPiece(i, j) {
return b;
}
+ getEpSquare(moveOrSquare) {
+ if (!moveOrSquare) return undefined;
+ if (typeof moveOrSquare === "string") {
+ const square = moveOrSquare;
+ if (square == "-") return undefined;
+ return V.SquareToCoords(square);
+ }
+ const move = moveOrSquare;
+ const s = move.start,
+ e = move.end;
+ const color = move.vanish[0].c;
+ if (
+ s.y == e.y &&
+ Math.abs(s.x - e.x) == 2 &&
+ ((color == 'w' && s.x == 6) || (color == 'b' && s.x == 1)) &&
+ [V.PAWN, V.HIDDEN_QUEEN].includes(move.vanish[0].p)
+ ) {
+ return {
+ x: (s.x + e.x) / 2,
+ y: s.y
+ };
+ }
+ return undefined; //default
+ }
+
isValidPawnMove(move) {
const color = move.vanish[0].c;
const pawnShift = color == "w" ? -1 : 1;
return super.getPotentialMovesFrom([x, y]);
}
- // TODO: find a more general way to describe pawn movements to avoid
- // re-writing almost the same function for several variants.
- getPotentialPawnMoves([x, y]) {
- const color = this.turn;
- const piece = this.getPiece(x, y);
- 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;
-
- const finalPieces =
- x + shiftX == lastRank
- ? piece == V.PAWN
- ? [V.ROOK, V.KNIGHT, V.BISHOP, V.QUEEN]
- : [V.QUEEN] //hidden queen revealed
- : [piece]; //V.PAWN
- if (this.board[x + shiftX][y] == V.EMPTY) {
- // One square forward
- for (let p of finalPieces) {
- moves.push(
- this.getBasicMove([x, y], [x + shiftX, y], {
- c: color,
- p: p
- })
- );
- }
- if (
- x == startRank &&
- this.board[x + 2 * shiftX][y] == V.EMPTY
- ) {
- // Two squares jump
- moves.push(this.getBasicMove([x, y], [x + 2 * shiftX, y]));
- }
- }
- // 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 p of finalPieces) {
- moves.push(
- this.getBasicMove([x, y], [x + shiftX, y + shiftY], {
- c: color,
- p: p
- })
- );
- }
- }
- }
-
- // En passant
+ getEnpassantCaptures([x, y], shiftX) {
const Lep = this.epSquares.length;
- const epSquare = this.epSquares[Lep - 1]; //always at least one element
+ const epSquare = this.epSquares[Lep - 1];
+ let enpassantMove = null;
if (
!!epSquare &&
epSquare.x == x + shiftX &&
Math.abs(epSquare.y - y) == 1
) {
- let enpassantMove = this.getBasicMove([x, y], [epSquare.x, epSquare.y]);
+ enpassantMove = this.getBasicMove([x, y], [epSquare.x, epSquare.y]);
enpassantMove.vanish.push({
x: x,
y: epSquare.y,
- p: "p",
+ // Captured piece may be a hidden queen
+ p: this.board[x][epSquare.y][1],
c: this.getColor(x, epSquare.y)
});
- moves.push(enpassantMove);
}
+ return !!enpassantMove ? [enpassantMove] : [];
+ }
- return moves;
+ getPotentialPawnMoves([x, y]) {
+ const piece = this.getPiece(x, y);
+ const promotions =
+ piece == V.PAWN
+ ? [V.ROOK, V.KNIGHT, V.BISHOP, V.QUEEN]
+ : [V.QUEEN]; //hidden queen revealed
+ return super.getPotentialPawnMoves([x, y], promotions);
}
getPossibleMovesFrom(sq) {
this.kingPos[oppCol] = [move.vanish[1].x, move.vanish[1].y];
}
+ underCheck(color) {
+ if (this.kingPos[color][0] < 0) return false;
+ return super.underCheck(color);
+ }
+
getCurrentScore() {
const color = this.turn;
if (this.kingPos[color][0] < 0)
}
getNotation(move) {
- const notation = super.getNotation(move);
- if (notation.charAt(0) == 'T')
- // Do not reveal hidden queens
- return notation.substr(1);
+ // Not using getPiece() method because it would transform HQ into pawn:
+ if (this.board[move.start.x][move.start.y][1] != V.HIDDEN_QUEEN)
+ return super.getNotation(move);
+ const finalSquare = V.CoordsToSquare(move.end);
+ if (move.appear[0].p == V.QUEEN) {
+ return (
+ "Q" +
+ (move.vanish.length > move.appear.length ? "x" : "") +
+ finalSquare
+ );
+ }
+ // Do not reveal hidden queens playing as pawns
+ let notation = "";
+ if (move.vanish.length == 2)
+ // Capture
+ notation = V.CoordToColumn(move.start.y) + "x" + finalSquare;
+ else notation = finalSquare;
return notation;
}
};