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Calculate min distance between king and his pawns

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Just added infrastructure.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2012-06-17 09:03:05 +01:00
parent 0446fc85de
commit 9793fa1906
4 changed files with 14 additions and 0 deletions
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5
src/pawns.cpp
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@@ -261,6 +261,11 @@ Score PawnEntry::update_safety(const Position& pos, Square ksq) {
kingSquares[Us] = ksq;
castleRights[Us] = pos.can_castle(Us);
minKPdistance[Us] = 0;
Bitboard pawns = pos.pieces(Us, PAWN);
if (pawns)
while (!(DistanceRingsBB[ksq][minKPdistance[Us]++] & pawns)) {}
if (relative_rank(Us, ksq) > RANK_4)
return kingSafety[Us] = SCORE_ZERO;