King danger: retire attacked-by-bishop defense

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 24bcb9ad2af5baf1f9d15d49e05068fb552687f1..d3f38aae10954ec1eadefdbbc59cb6548e21b837 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -974,8 +974,7 @@ moves_loop: // When in check, search starts from here
           moveCountPruning = moveCount >= futility_move_count(improving, depth);
 
           if (   !captureOrPromotion
-              && !givesCheck
-              && (!PvNode || !pos.advanced_pawn_push(move) || pos.non_pawn_material(~us) > BishopValueMg))
+              && !givesCheck)
           {
               // Reduced depth of the next LMR search
               int lmrDepth = std::max(newDepth - reduction(improving, depth, moveCount), 0);
@@ -1085,7 +1084,8 @@ moves_loop: // When in check, search starts from here
           && (  !captureOrPromotion
               || moveCountPruning
               || ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha
-              || cutNode))
+              || cutNode
+              || thisThread->ttHitAverage < 384 * ttHitAverageResolution * ttHitAverageWindow / 1024))
       {
           Depth r = reduction(improving, depth, moveCount);