Tweak capture LMR.

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 60a002a908842da0221b0cb42db7df686b24cd8e..c6db82ba18026f36a5121f89e97a4a27e4ed134e 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1172,7 +1172,7 @@ moves_loop: // When in check, search starts from here
               || moveCountPruning
               || ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha
               || cutNode
-              || (!PvNode && !formerPv)
+              || (!PvNode && !formerPv && thisThread->captureHistory[movedPiece][to_sq(move)][type_of(pos.captured_piece())] < 4506)
               || thisThread->ttHitAverage < 432 * TtHitAverageResolution * TtHitAverageWindow / 1024))
       {
           Depth r = reduction(improving, depth, moveCount);