diff --git a/src/evaluate.cpp b/src/evaluate.cpp index a03f7ddb..104a0a6b 100644 --- a/src/evaluate.cpp +++ b/src/evaluate.cpp @@ -1069,7 +1069,10 @@ namespace { Square winnerQSq = relative_square(winnerSide, make_square(square_file(pawnToGo[winnerSide]), RANK_8)); Square loserQSq = relative_square(loserSide, make_square(square_file(pawnToGo[loserSide]), RANK_8)); - Bitboard b = pos.attacks_from(winnerQSq); + Bitboard b = pos.occupied_squares(); + clear_bit(&b, pawnToGo[winnerSide]); + clear_bit(&b, pawnToGo[loserSide]); + b = queen_attacks_bb(winnerQSq, b); if ( (b & pos.pieces(KING, loserSide)) ||(bit_is_set(b, loserQSq) && !bit_is_set(ei.attacked_by(loserSide), loserQSq)))