X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=91ac60ad4b2615f47864631e139b1108a4266012;hp=6ec4d80322372332e10f909a5c574dbf6be5f3d9;hb=9587eeeb5ed29f834d4f956b92e0e732877c47a7;hpb=33f3cfae0093b934563e1eca78486261f18e4650

diff --git a/src/search.cpp b/src/search.cpp
index 6ec4d803..91ac60ad 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1167,6 +1167,13 @@ moves_loop: // When in check, search starts from here
       {
           Depth r = reduction(improving, depth, moveCount);
 
+          // Decrease reduction at non-check cut nodes for second move at low depths
+          if (   cutNode
+              && depth <= 10
+              && moveCount <= 2
+              && !ss->inCheck)
+              r--;
+
           // Decrease reduction if the ttHit running average is large
           if (thisThread->ttHitAverage > 473 * TtHitAverageResolution * TtHitAverageWindow / 1024)
               r--;