diff --git a/src/evaluate.cpp b/src/evaluate.cpp index 9a55fbd8..3099924c 100644 --- a/src/evaluate.cpp +++ b/src/evaluate.cpp @@ -152,6 +152,8 @@ namespace { // Hanging contains a bonus for each enemy hanging piece const Score Hanging = S(23, 20); + const Score KingPawnThreatOne = S(0, 64); + const Score KingPawnThreatMany = S(0, 128); #undef S @@ -527,7 +529,11 @@ namespace { b = weakEnemies & ~ei.attackedBy[Them][ALL_PIECES]; if (b) score += more_than_one(b) ? Hanging * popcount(b) : Hanging; - } + + b = weakEnemies & pos.pieces(Them, PAWN) & ei.attackedBy[Us][KING]; + if (b) + score += more_than_one(b) ? KingPawnThreatMany : KingPawnThreatOne; + } if (Trace) Tracing::terms[Us][Tracing::THREAT] = score;