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First Rank Attacks

113 bytes added, 07:55, 10 October 2019
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unsigned int file = sq & 7;
unsigned int rkx8 = sq & 56; // rank * 8
occ unsigned int rankOccX2 = (occ >> rkx8) & 2*63;// 2 times the inner six bit rank occupancy used as index U64 attacks = arrFirstRankAttacks64x8[4*occ rankOccX2 + file];// 8 * rank occupancy + file
return attacks << rkx8;
}
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