// Bonus for rook on an open or semi-open file
if (pos.is_on_semiopen_file(Us, s))
- score += RookOnFile[bool(pos.is_on_semiopen_file(Them, s))];
+ score += RookOnFile[pos.is_on_semiopen_file(Them, s)];
// Penalty when trapped by the king, even more if the king cannot castle
else if (mob <= 3)