BIT               331 src/board.cpp              board->pawn_file[colour][SQUARE_FILE(sq)] |= BIT(PAWN_RANK(sq,colour));
BIT               488 src/move_do.cpp       board->pawn_file[colour][SQUARE_FILE(square)] ^= BIT(PAWN_RANK(square,colour));
BIT               621 src/move_do.cpp       board->pawn_file[colour][SQUARE_FILE(square)] ^= BIT(PAWN_RANK(square,colour));
BIT               712 src/move_do.cpp       board->pawn_file[colour][SQUARE_FILE(from)] ^= BIT(PAWN_RANK(from,colour));
BIT               713 src/move_do.cpp       board->pawn_file[colour][SQUARE_FILE(to)]   ^= BIT(PAWN_RANK(to,colour));
BIT               308 src/pawn.cpp            pawn_file[file] |= BIT(rank);
BIT               349 src/pawn.cpp            file_bits[me] |= BIT(file);
BIT               413 src/pawn.cpp                  passed_bits[me] |= BIT(file);