// En-passant square, if any
getEpSquare(moveOrSquare) {
// En-passant square, if any
getEpSquare(moveOrSquare) {
if (typeof moveOrSquare === "string") {
const square = moveOrSquare;
if (square == "-") return undefined;
if (typeof moveOrSquare === "string") {
const square = moveOrSquare;
if (square == "-") return undefined;
scanKings(fen) {
// Squares of white and black king:
this.kingPos = { w: [-1, -1], b: [-1, -1] };
const fenRows = V.ParseFen(fen).position.split("/");
scanKings(fen) {
// Squares of white and black king:
this.kingPos = { w: [-1, -1], b: [-1, -1] };
const fenRows = V.ParseFen(fen).position.split("/");
for (let i = 0; i < fenRows.length; i++) {
let k = 0; //column index on board
for (let j = 0; j < fenRows[i].length; j++) {
for (let i = 0; i < fenRows.length; i++) {
let k = 0; //column index on board
for (let j = 0; j < fenRows[i].length; j++) {
// King, then rook:
finalSquares = finalSquares || [ [2, 3], [V.size.y - 2, V.size.y - 3] ];
const castlingKing = this.board[x][y].charAt(1);
// King, then rook:
finalSquares = finalSquares || [ [2, 3], [V.size.y - 2, V.size.y - 3] ];
const castlingKing = this.board[x][y].charAt(1);
// Nothing on the path of the king ? (and no checks)
const finDist = finalSquares[castleSide][0] - y;
let step = finDist / Math.max(1, Math.abs(finDist));
// Nothing on the path of the king ? (and no checks)
const finDist = finalSquares[castleSide][0] - y;
let step = finDist / Math.max(1, Math.abs(finDist));
V.OnBoard(rx, ry) &&
this.board[rx][ry] != V.EMPTY &&
this.getPiece(rx, ry) == piece &&
V.OnBoard(rx, ry) &&
this.board[rx][ry] != V.EMPTY &&
this.getPiece(rx, ry) == piece &&
- this.getColor(rx, ry) == color
+ this.getColor(rx, ry) == color &&
+ this.canTake([rx, ry], [x, y]) //for Paco-Sako (TODO: necessary?)
const c = color || V.GetOppCol(this.turn);
const firstRank = (c == "w" ? V.size.x - 1 : 0);
// Update castling flags if rooks are moved
const c = color || V.GetOppCol(this.turn);
const firstRank = (c == "w" ? V.size.x - 1 : 0);
// Update castling flags if rooks are moved