wksq = Square((idx >> 0) & 0x3F);
bksq = Square((idx >> 6) & 0x3F);
us = Color ((idx >> 12) & 0x01);
- psq = File ((idx >> 13) & 0x03) | Rank(RANK_7 - (idx >> 15));
+ psq = make_square(File((idx >> 13) & 0x03), Rank(RANK_7 - (idx >> 15)));
result = UNKNOWN;
// Check if two pieces are on the same square or if a king can be captured