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Fix a bug in generate_piece_checks()

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We are generating also king moves that give check !

Of course these moves are illegal so are in any case
filtered out in MovePicker. Neverthless we should avoid
to generate them.

Also simplify a bit the code.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-09-21 08:47:47 +01:00
parent 746bcb348f
commit aaffcf973e
1 changed files with 12 additions and 15 deletions
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5
src/movegen.cpp
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@ -848,10 +848,8 @@ namespace {
// Direct checks
b = target & ~dc;
if (Piece != KING || b)
{
Bitboard checkSqs = pos.attacks_from<Piece>(ksq) & pos.empty_squares();
if (!checkSqs)
if (Piece == KING || !checkSqs)
return mlist;
while (b)
@ -865,7 +863,6 @@ namespace {
Bitboard bb = pos.attacks_from<Piece>(from) & checkSqs;
SERIALIZE_MOVES(bb);
}
}
return mlist;
}