if ( passed
|| isolated
|| chain
- || (pos.pawn_attacks(us, s) & theirPawns)
+ || (pos.pawn_attacks(s, us) & theirPawns)
|| (ourPawns & behind_bb(us, r) & neighboring_files_bb(f)))
backward = false;
else
// pawn on neighboring files. We now check whether the pawn is
// backward by looking in the forward direction on the neighboring
// files, and seeing whether we meet a friendly or an enemy pawn first.
- Bitboard b = pos.pawn_attacks(us, s);
+ Bitboard b = pos.pawn_attacks(s, us);
if (us == WHITE)
{
for ( ; !(b & (ourPawns | theirPawns)); b <<= 8);