@Override
protected int getYFromSq(int sq) {
if (sq >= 0) {
return Position.getY(sq);
} else {
int p = -2 - sq;
if (landScape) {
switch (p) {
case Piece.WKING:
case Piece.BKING:
return 0;
case Piece.WQUEEN:
case Piece.BQUEEN:
return 1;
case Piece.WROOK:
case Piece.BROOK:
return 2;
case Piece.WBISHOP:
case Piece.BBISHOP:
return 3;
case Piece.WKNIGHT:
case Piece.BKNIGHT:
return 4;
case Piece.WPAWN:
case Piece.BPAWN:
return 5;
default:
return 6;
}
} else {
return Piece.isWhite(p) ? -1 : -2;
}
}
}
/** Compute material difference for a position. */
public static MaterialDiff getMaterialDiff(Position pos) {
StringBuilder whiteString = new StringBuilder();
StringBuilder blackString = new StringBuilder();
for (int p = Piece.WPAWN; p >= Piece.WKING; p--) {
int diff = pos.nPieces(p) - pos.nPieces(Piece.swapColor(p));
while (diff < 0) {
whiteString.append(Piece.toUniCode(Piece.swapColor(p)));
diff++;
}
while (diff > 0) {
blackString.append(Piece.toUniCode(p));
diff--;
}
}
return new MaterialDiff(whiteString, blackString);
}