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Promotion piece must be empty if is not a promotion

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Add a new check in  move_is_legal()

Avoid useless casting in move.h while there.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-05-22 08:35:14 +01:00
parent 3ef4fdeaa0
commit 90e83fa879
2 changed files with 11 additions and 7 deletions
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6
src/position.cpp
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@@ -676,9 +676,13 @@ bool Position::move_is_legal(const Move m, Bitboard pinned) const {
if (move_is_special(m))
return move_is_legal(m);
// Is not a promotion, so promotion piece must be empty
if (move_promotion_piece(m) - 2 != PIECE_TYPE_NONE)
return false;
// If the from square is not occupied by a piece belonging to the side to
// move, the move is obviously not legal.
if (color_of_piece(pc) != us)
if (pc == PIECE_NONE || color_of_piece(pc) != us)
return false;
// The destination square cannot be occupied by a friendly piece