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Drop not defended by pawn condition

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Passed no-regression test both at STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 96554 W: 17563 L: 17572 D: 61419

and at LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 31891 W: 4905 L: 4801 D: 22185

bench: 7720896
This commit is contained in:
Stefan Geschwentner 2014-04-01 11:58:10 +02:00 • committed by Marco Costalba
parent d2caba1f66
commit 0ba814b3ca
1 changed files with 1 additions and 6 deletions
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7
src/evaluate.cpp
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@ -204,8 +204,6 @@ namespace {
const int BishopCheck = 2; const int BishopCheck = 2;
const int KnightCheck = 3; const int KnightCheck = 3;
const int UnsupportedPinnedPiece = 2;
// KingDanger[Color][attackUnits] contains the actual king danger weighted // KingDanger[Color][attackUnits] contains the actual king danger weighted
// scores, indexed by color and by a calculated integer number. // scores, indexed by color and by a calculated integer number.
Score KingDanger[COLOR_NB][128]; Score KingDanger[COLOR_NB][128];
@ -631,6 +629,7 @@ Value do_evaluate(const Position& pos) {
// the pawn shelter (current 'score' value). // the pawn shelter (current 'score' value).
attackUnits = std::min(20, (ei.kingAttackersCount[Them] * ei.kingAttackersWeight[Them]) / 2) attackUnits = std::min(20, (ei.kingAttackersCount[Them] * ei.kingAttackersWeight[Them]) / 2)
+ 3 * (ei.kingAdjacentZoneAttacksCount[Them] + popcount<Max15>(undefended)) + 3 * (ei.kingAdjacentZoneAttacksCount[Them] + popcount<Max15>(undefended))
+ 2 * (ei.pinnedPieces[Us] != 0)
- mg_value(score) / 32; - mg_value(score) / 32;
// Analyse the enemy's safe queen contact checks. Firstly, find the // Analyse the enemy's safe queen contact checks. Firstly, find the
@ -695,10 +694,6 @@ Value do_evaluate(const Position& pos) {
if (b) if (b)
attackUnits += KnightCheck * popcount<Max15>(b); attackUnits += KnightCheck * popcount<Max15>(b);
// Penalty for pinned pieces not defended by a pawn
if (ei.pinnedPieces[Us] & ~ei.attackedBy[Us][PAWN])
attackUnits += UnsupportedPinnedPiece;
// To index KingDanger[] attackUnits must be in [0, 99] range // To index KingDanger[] attackUnits must be in [0, 99] range
attackUnits = std::min(99, std::max(0, attackUnits)); attackUnits = std::min(99, std::max(0, attackUnits));