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Custom en passant #952

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Custom en passant #952

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4 changes: 2 additions & 2 deletions src/movegen.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -301,13 +301,13 @@ namespace {
Bitboard quiets = pos.moves_from(Us, Pt, from);
Bitboard b = ( (attacks & pos.pieces())
| (quiets & ~pos.pieces()));
Bitboard b1 = b & target;
Bitboard epSquares = (pos.variant()->enPassantTypes[Us] & Pt) ? (attacks & pos.ep_squares() & ~pos.pieces()) : Bitboard(0);
Bitboard b1 = b & target & ~epSquares;
Bitboard promotion_zone = pos.promotion_zone(Us);
PieceType promPt = pos.promoted_piece_type(Pt);
Bitboard b2 = promPt && (!pos.promotion_limit(promPt) || pos.promotion_limit(promPt) > pos.count(Us, promPt)) ? b1 : Bitboard(0);
Bitboard b3 = pos.piece_demotion() && pos.is_promoted(from) ? b1 : Bitboard(0);
Bitboard pawnPromotions = (pos.promotion_pawn_types(Us) & Pt) ? (b & (Type == EVASIONS ? target : ~pos.pieces(Us)) & promotion_zone) : Bitboard(0);
Bitboard epSquares = (pos.en_passant_types(Us) & Pt) ? (attacks & ~quiets & pos.ep_squares() & ~pos.pieces()) : Bitboard(0);

// target squares considering pawn promotions
if (pawnPromotions && pos.mandatory_pawn_promotion())
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