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;
const startRank = color == "w" ? V.size.x - 2 : 1;
- const lastRank = color == "w" ? 0 : V.size.x - 1;
return (
- // The queen is discovered if she reaches the 8th rank,
- // even if this would be a technically valid pawn move.
- move.end.x != lastRank &&
(
+ move.end.x - move.start.x == pawnShift &&
(
- move.end.x - move.start.x == pawnShift &&
(
- (
- // Normal move
- move.end.y == move.start.y &&
- this.board[move.end.x][move.end.y] == V.EMPTY
- )
- ||
- (
- // Capture
- Math.abs(move.end.y - move.start.y) == 1 &&
- this.board[move.end.x][move.end.y] != V.EMPTY
- )
+ // Normal move
+ move.end.y == move.start.y &&
+ this.board[move.end.x][move.end.y] == V.EMPTY
+ )
+ ||
+ (
+ // Capture
+ Math.abs(move.end.y - move.start.y) == 1 &&
+ this.board[move.end.x][move.end.y] != V.EMPTY
)
- )
- ||
- (
- // Two-spaces initial jump
- move.start.x == startRank &&
- move.end.y == move.start.y &&
- move.end.x - move.start.x == 2 * pawnShift &&
- this.board[move.end.x][move.end.y] == V.EMPTY
)
)
+ ||
+ (
+ // Two-spaces initial jump
+ move.start.x == startRank &&
+ move.end.y == move.start.y &&
+ move.end.x - move.start.x == 2 * pawnShift &&
+ this.board[move.end.x][move.end.y] == V.EMPTY
+ )
);
}
getPotentialMovesFrom([x, y]) {
if (this.getPiece(x, y) == V.HIDDEN_QUEEN) {
- const pawnMoves = super.getPotentialPawnMoves([x, y]);
+ const pawnMoves = this.getPotentialPawnMoves([x, y]);
let queenMoves = super.getPotentialQueenMoves([x, y]);
// Remove from queen moves those corresponding to a pawn move:
queenMoves = queenMoves
return super.getPotentialMovesFrom([x, y]);
}
+ getEnpassantCaptures([x, y], shiftX) {
+ const Lep = this.epSquares.length;
+ const epSquare = this.epSquares[Lep - 1];
+ let enpassantMove = null;
+ if (
+ !!epSquare &&
+ epSquare.x == x + shiftX &&
+ Math.abs(epSquare.y - y) == 1
+ ) {
+ enpassantMove = this.getBasicMove([x, y], [epSquare.x, epSquare.y]);
+ enpassantMove.vanish.push({
+ x: x,
+ y: epSquare.y,
+ // Captured piece may be a hidden queen
+ p: this.board[x][epSquare.y][1],
+ c: this.getColor(x, epSquare.y)
+ });
+ }
+ return !!enpassantMove ? [enpassantMove] : [];
+ }
+
+ 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.side = this.turn;
return this.filterValid(this.getPotentialMovesFrom(sq));
}
- static GenRandInitFen() {
- let fen = ChessRules.GenRandInitFen();
- // Place hidden queens at random:
+ static GenRandInitFen(randomness) {
+ let fen = ChessRules.GenRandInitFen(randomness);
+ // Place hidden queens at random (always):
let hiddenQueenPos = randInt(8);
let pawnRank = "PPPPPPPP".split("");
pawnRank[hiddenQueenPos] = "T";
return fen;
}
- updateVariables(move) {
- super.updateVariables(move);
+ postPlay(move) {
+ super.postPlay(move);
if (move.vanish.length == 2 && move.vanish[1].p == V.KING)
// We took opponent king
this.kingPos[this.turn] = [-1, -1];
}
- unupdateVariables(move) {
- super.unupdateVariables(move);
- const c = move.vanish[0].c;
- const oppCol = V.GetOppCol(c);
+ preUndo(move) {
+ super.preUndo(move);
+ const oppCol = this.turn;
if (this.kingPos[oppCol][0] < 0)
- // Last move took opponent's king:
+ // Move takes opponent's king:
this.kingPos[oppCol] = [move.vanish[1].x, move.vanish[1].y];
}
this.side = this.turn;
return super.getComputerMove();
}
+
+ getNotation(move) {
+ // 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;
+ }
};
projects / vchess.git / blobdiff