PIECE_IS_BISHOP   278 src/eval.cpp         ASSERT(PIECE_IS_BISHOP(board->square[wb]));
PIECE_IS_BISHOP   281 src/eval.cpp         ASSERT(PIECE_IS_BISHOP(board->square[bb]));
PIECE_IS_BISHOP  1883 src/eval.cpp         if (PIECE_IS_BISHOP(piece) && SQUARE_COLOUR(from) == SQUARE_COLOUR(to)) {