if (relative_rank(Us, pos.square<KING>(Us)) == RANK_1)
kingRing[Us] |= shift<Up>(kingRing[Us]);
+ if (file_of(pos.square<KING>(Us)) == FILE_H)
+ kingRing[Us] |= shift<WEST>(kingRing[Us]);
+
+ else if (file_of(pos.square<KING>(Us)) == FILE_A)
+ kingRing[Us] |= shift<EAST>(kingRing[Us]);
+
kingAttackersCount[Them] = popcount(attackedBy[Us][KING] & pe->pawn_attacks(Them));
kingAttacksCount[Them] = kingAttackersWeight[Them] = 0;
}