hash_piece_key     53 src/hash.cpp            key ^= hash_piece_key(piece,sq);
hash_piece_key     58 src/hash.cpp            key ^= hash_piece_key(piece,sq);
hash_piece_key     98 src/hash.cpp            key ^= hash_piece_key(piece,sq);
hash_piece_key     36 src/hash.h     extern uint64 hash_piece_key    (int piece, int square);