return V.ShowMoves;
}
+ // Sometimes moves must remain hidden until game ends
+ static get SomeHiddenMoves() {
+ return false;
+ }
+ get someHiddenMoves() {
+ return V.SomeHiddenMoves;
+ }
+
+ // Generally true, unless the variant includes random effects
+ static get CorrConfirm() {
+ return true;
+ }
+
// Used for Monochrome variant (TODO: harmonize: !canFlip ==> showFirstTurn)
get showFirstTurn() {
return false;
return V.CanFlip;
}
+ // For (generally old) variants without checkered board
+ static get Monochrome() {
+ return false;
+ }
+
+ // Some variants require lines drawing
+ static get Lines() {
+ if (V.Monochrome) {
+ let lines = [];
+ // Draw all inter-squares lines
+ for (let i = 0; i <= V.size.x; i++)
+ lines.push([[i, 0], [i, V.size.y]]);
+ for (let j = 0; j <= V.size.y; j++)
+ lines.push([[0, j], [V.size.x, j]]);
+ return lines;
+ }
+ return null;
+ }
+
// Some variants use click infos:
doClick() {
return null;
}
+ // Some variants may need to highlight squares on hover (Hamilton, Weiqi...)
+ hoverHighlight() {
+ return false;
+ }
+
static get IMAGE_EXTENSION() {
// All pieces should be in the SVG format
return ".svg";
// 2) Check turn
if (!fenParsed.turn || !V.IsGoodTurn(fenParsed.turn)) return false;
// 3) Check moves count
- if (!fenParsed.movesCount || !(parseInt(fenParsed.movesCount) >= 0))
+ if (!fenParsed.movesCount || !(parseInt(fenParsed.movesCount, 10) >= 0))
return false;
// 4) Check flags
if (V.HasFlags && (!fenParsed.flags || !V.IsGoodFlags(fenParsed.flags)))
if (['K','k'].includes(row[i])) kings[row[i]]++;
if (V.PIECES.includes(row[i].toLowerCase())) sumElts++;
else {
- const num = parseInt(row[i]);
+ const num = parseInt(row[i], 10);
if (isNaN(num)) return false;
sumElts += num;
}
return {
// NOTE: column is always one char => max 26 columns
// row is counted from black side => subtraction
- x: V.size.x - parseInt(sq.substr(1)),
+ x: V.size.x - parseInt(sq.substr(1), 10),
y: sq[0].charCodeAt() - 97
};
}
let j = 0;
for (let indexInRow = 0; indexInRow < rows[i].length; indexInRow++) {
const character = rows[i][indexInRow];
- const num = parseInt(character);
+ const num = parseInt(character, 10);
// If num is a number, just shift j:
if (!isNaN(num)) j += num;
// Else: something at position i,j
const fenParsed = V.ParseFen(fen);
this.board = V.GetBoard(fenParsed.position);
this.turn = fenParsed.turn;
- this.movesCount = parseInt(fenParsed.movesCount);
+ this.movesCount = parseInt(fenParsed.movesCount, 10);
this.setOtherVariables(fen);
}
this.INIT_COL_KING["w"] = k;
break;
default: {
- const num = parseInt(fenRows[i].charAt(j));
+ const num = parseInt(fenRows[i].charAt(j), 10);
if (!isNaN(num)) k += num - 1;
}
}
if (x2 == lastRank) {
// promotions arg: special override for Hiddenqueen variant
if (!!promotions) finalPieces = promotions;
- else if (!!V.PawnSpecs.promotions)
- finalPieces = V.PawnSpecs.promotions;
+ else if (!!V.PawnSpecs.promotions) finalPieces = V.PawnSpecs.promotions;
}
let tr = null;
for (let piece of finalPieces) {
const [sizeX, sizeY] = [V.size.x, V.size.y];
const pawnShiftX = V.PawnSpecs.directions[color];
const firstRank = (color == "w" ? sizeX - 1 : 0);
+ const forward = (color == 'w' ? -1 : 1);
// Pawn movements in shiftX direction:
const getPawnMoves = (shiftX) => {
// NOTE: next condition is generally true (no pawn on last rank)
if (x + shiftX >= 0 && x + shiftX < sizeX) {
if (this.board[x + shiftX][y] == V.EMPTY) {
- // One square forward
+ // One square forward (or backward)
this.addPawnMoves([x, y], [x + shiftX, y], moves, promotions);
// Next condition because pawns on 1st rank can generally jump
if (
(color == 'b' && x <= V.PawnSpecs.initShift['b'])
)
) {
- if (this.board[x + 2 * shiftX][y] == V.EMPTY) {
+ if (
+ shiftX == forward &&
+ this.board[x + 2 * shiftX][y] == V.EMPTY
+ ) {
// Two squares jump
moves.push(this.getBasicMove([x, y], [x + 2 * shiftX, y]));
if (
// Captures
if (V.PawnSpecs.canCapture) {
for (let shiftY of [-1, 1]) {
- if (
- y + shiftY >= 0 &&
- y + shiftY < sizeY
- ) {
+ if (y + shiftY >= 0 && y + shiftY < sizeY) {
if (
this.board[x + shiftX][y + shiftY] != V.EMPTY &&
this.canTake([x, y], [x + shiftX, y + shiftY])
);
}
if (
- V.PawnSpecs.captureBackward &&
+ V.PawnSpecs.captureBackward && shiftX == forward &&
x - shiftX >= 0 && x - shiftX < V.size.x &&
this.board[x - shiftX][y + shiftY] != V.EMPTY &&
this.canTake([x, y], [x - shiftX, y + shiftY])
) {
this.addPawnMoves(
- [x, y], [x + shiftX, y + shiftY],
+ [x, y], [x - shiftX, y + shiftY],
moves, promotions
);
}
this.getEnpassantCaptures([x, y], pawnShiftX)
);
}
+
return pMoves;
}
}
// "castleInCheck" arg to let some variants castle under check
- getCastleMoves([x, y], castleInCheck) {
+ getCastleMoves([x, y], castleInCheck, castleWith) {
const c = this.getColor(x, y);
if (x != (c == "w" ? V.size.x - 1 : 0) || y != this.INIT_COL_KING[c])
return []; //x isn't first rank, or king has moved (shortcut)
// NOTE: in some variants this is not a rook
const rookPos = this.castleFlags[c][castleSide];
- if (this.board[x][rookPos] == V.EMPTY || this.getColor(x, rookPos) != c)
+ if (
+ this.board[x][rookPos] == V.EMPTY ||
+ this.getColor(x, rookPos) != c ||
+ (!!castleWith && !castleWith.includes(this.getPiece(x, rookPos)))
+ ) {
// Rook is not here, or changed color (see Benedict)
continue;
+ }
// Nothing on the path of the king ? (and no checks)
const castlingPiece = this.getPiece(x, rookPos);
if (
// NOTE: "castling" arg is used by some variants (Monster),
// where "isAttacked" is overloaded in an infinite-recursive way.
+ // TODO: not used anymore (Monster + Doublemove2 are simplified).
(!castleInCheck && this.isAttacked([x, i], oppCol, "castling")) ||
(this.board[x][i] != V.EMPTY &&
// NOTE: next check is enough, because of chessboard constraints
if (this.board[i][j] != V.EMPTY && this.getColor(i, j) == color) {
const moves = this.getPotentialMovesFrom([i, j]);
if (moves.length > 0) {
- for (let k = 0; k < moves.length; k++) {
+ for (let k = 0; k < moves.length; k++)
if (this.filterValid([moves[k]]).length > 0) return true;
- }
}
}
}
}
// Is square x,y attacked by 'color' pawns ?
- isAttackedByPawn([x, y], color) {
+ isAttackedByPawn(sq, color) {
const pawnShift = (color == "w" ? 1 : -1);
- if (x + pawnShift >= 0 && 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) == color
- ) {
- return true;
- }
- }
- }
- return false;
+ return this.isAttackedBySlideNJump(
+ sq,
+ color,
+ V.PAWN,
+ [[pawnShift, 1], [pawnShift, -1]],
+ "oneStep"
+ );
}
// Is square x,y attacked by 'color' rooks ?
this.postPlay(move);
}
- updateCastleFlags(move, piece) {
- const c = V.GetOppCol(this.turn);
+ updateCastleFlags(move, piece, color) {
+ const c = color || V.GetOppCol(this.turn);
const firstRank = (c == "w" ? V.size.x - 1 : 0);
// Update castling flags if rooks are moved
const oppCol = this.turn;
piece = move.appear[0].p;
// Update king position + flags
- if (piece == V.KING && move.appear.length > 0) {
- this.kingPos[c][0] = move.appear[0].x;
- this.kingPos[c][1] = move.appear[0].y;
- }
+ if (piece == V.KING && move.appear.length > 0)
+ this.kingPos[c] = [move.appear[0].x, move.appear[0].y];
if (V.HasCastle) this.updateCastleFlags(move, piece);
}
projects / vchess.git / blobdiff