for (let row of rows) {
let sumElts = 0;
for (let i = 0; i < row.length; i++) {
- if (['K','k'].includes(row[i]))
- kings[row[i]] = true;
+ if (['K','k'].includes(row[i])) kings[row[i]] = true;
if (V.PIECES.includes(row[i].toLowerCase())) sumElts++;
else {
const num = parseInt(row[i]);
if (sumElts != V.size.y) return false;
}
// Both kings should be on board:
- if (Object.keys(kings).length != 2)
- return false;
+ if (Object.keys(kings).length != 2) return false;
return true;
}
// Extract (relevant) flags from fen
setFlags(fenflags) {
// white a-castle, h-castle, black a-castle, h-castle
- this.castleFlags = { w: [true, true], b: [true, true] };
+ this.castleFlags = { w: [-1, -1], b: [-1, -1] };
for (let i = 0; i < 4; i++) {
this.castleFlags[i < 2 ? "w" : "b"][i % 2] =
V.ColumnToCoord(fenflags.charAt(i));
this.postPlay(move);
}
- updateCastleFlags(move) {
+ updateCastleFlags(move, piece) {
const c = V.GetOppCol(this.turn);
const firstRank = (c == "w" ? V.size.x - 1 : 0);
// Update castling flags if rooks are moved
const oppCol = V.GetOppCol(c);
const oppFirstRank = V.size.x - 1 - firstRank;
- if (
+ if (piece == V.KING && move.appear.length > 0)
+ this.castleFlags[c] = [V.size.y, V.size.y];
+ else if (
move.start.x == firstRank && //our rook moves?
this.castleFlags[c].includes(move.start.y)
) {
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 (V.HasCastle) this.castleFlags[c] = [V.size.y, V.size.y];
return;
}
- if (V.HasCastle) this.updateCastleFlags(move);
+ if (V.HasCastle) this.updateCastleFlags(move, piece);
}
preUndo() {}
// What is the score ? (Interesting if game is over)
getCurrentScore() {
- if (this.atLeastOneMove())
- return "*";
-
+ if (this.atLeastOneMove()) return "*";
// Game over
const color = this.turn;
// No valid move: stalemate or checkmate?
- if (!this.isAttacked(this.kingPos[color], V.GetOppCol(color)))
- return "1/2";
+ if (!this.underCheck(color)) return "1/2";
// OK, checkmate
return (color == "w" ? "0-1" : "1-0");
}