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A promotion piece cannot be a king or a pawn 

Or any other garbage value bigger then QUEEN.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
sf_2.3.1_base
Marco Costalba 2010-05-02 13:39:47 +01:00
parent f16c231bc9
commit df7cd94aee
1 changed files with 4 additions and 0 deletions
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4
src/movegen.cpp
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@ -338,6 +338,10 @@ bool move_is_legal(const Position& pos, const Move m, Bitboard pinned) {
||(square_rank(to) == RANK_1 && us != WHITE)) != bool(move_is_promotion(m)))
return false;
// The promotion piece, if any, must be valid
if (move_promotion_piece(m) > QUEEN || move_promotion_piece(m) == PAWN)
return false;
// Proceed according to the square delta between the origin and
// destination squares.
switch (direction)