BIT_FIRST 938 src/eval.cpp file = BIT_FIRST(bits); BIT_FIRST 1824 src/eval.cpp dist = BIT_FIRST(board->pawn_file[colour][file]&BitGE[rank]); BIT_FIRST 503 src/pawn.cpp file = BIT_FIRST(bits); BIT_FIRST 504 src/pawn.cpp rank = BIT_FIRST(board->pawn_file[me][file]);