Simplify move history reduction

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 55be43b30f5594a09d7851469ef4238eff0d81a6..6580f520130f3d15b5be45edf3347289fcc568e7 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1165,7 +1165,7 @@ moves_loop:  // When in check, search starts here
                       + (*contHist[3])[movedPiece][to_sq(move)] - 3848;
 
         // Decrease/increase reduction for moves with a good/bad history (~25 Elo)
-        r -= ss->statScore / (10216 + 3855 * (depth > 5 && depth < 23));
+        r -= ss->statScore / 14200;
 
         // Step 17. Late moves reduction / extension (LMR, ~117 Elo)
         // We use various heuristics for the sons of a node after the first son has