- int file_is_half_open(Color c, File f) const { return halfOpenFiles[c] & (1 << int(f)); }
- int has_open_file_to_left(Color c, File f) const { return halfOpenFiles[c] & ((1 << int(f)) - 1); }
- int has_open_file_to_right(Color c, File f) const { return halfOpenFiles[c] & ~((1 << int(f+1)) - 1); }
+ int pawns_on_same_color_squares(Color c, Square s) const { return pawnsOnSquares[c][!!(BlackSquares & s)]; }
+ int half_open(Color c, File f) const { return halfOpenFiles[c] & (1 << int(f)); }
+ int half_open_on_side(Color c, File f, bool left) const {
+
+ return halfOpenFiles[c] & (left ? ((1 << int(f)) - 1) : ~((1 << int(f+1)) - 1));
+ }