if (position.length == 0) return false;
const rows = position.split("/");
if (rows.length != V.size.x) return false;
- let kingSymb = ['k', 'g', 'm', 'u', 'x', '_'];
+ let kingSymb = ['k', 'g', 'm', 'u', 'x', 'z', '_'];
let kings = { 'k': 0, 'K': 0 };
for (let row of rows) {
let sumElts = 0;
this.kingPos = { w: [-1, -1], b: [-1, -1] };
const fenRows = V.ParseFen(fen).position.split("/");
const startRow = { 'w': V.size.x - 1, 'b': 0 };
- const kingSymb = ['k', 'g', 'm', 'u', 'x', '_'];
+ const kingSymb = ['k', 'g', 'm', 'u', 'x', 'z', '_'];
for (let i = 0; i < fenRows.length; i++) {
let k = 0;
for (let j = 0; j < fenRows[i].length; j++) {
const c = this.turn;
const L = this.lastMoveEnd.length;
const lm = this.lastMoveEnd[L-1];
- const piece = (!!lm ? lm.p : move.vanish[0].p);
+ // NOTE: lm.p != V.KING, always.
+ const piece =
+ !!lm
+ ? lm.p :
+ this.getPiece(move.vanish[0].x, move.vanish[0].y);
if (piece == V.KING)
this.kingPos[c] = [move.appear[0].x, move.appear[0].y];
this.updateCastleFlags(move, piece);
const pawnFirstRank = (c == 'w' ? 6 : 1);
- if (move.start.x == pawnFirstRank)
- // This move (potentially) turns off a 2-squares pawn flag
+ if (
+ move.start.x == pawnFirstRank &&
+ piece == V.PAWN &&
+ Math.abs(move.end.x - move.start.x) == 2
+ ) {
+ // This move turns off a 2-squares pawn flag
this.pawnFlags[c][move.start.y] = false;
+ }
}
play(move) {
for (let i = mvArray.length - 1; i >= 0; i--) this.undo(mvArray[i]);
if (!mv.end.released) return (mvArray.length > 1 ? mvArray : mvArray[0]);
}
+ return null; //never reached
}
// NOTE: evalPosition() is wrong, but unused since bot plays at random