Revert "Reduce more CUT nodes only if parent node is reduced"

This reverts commit d54e8a59551a7ebcbf2c2155dce46c7386b1742a.

It was not proved with SPRT this tweak is stronger. So revert it
for now to follow fishtest guidelines.

bench: 5108393

diff --git a/src/search.cpp b/src/search.cpp
index bfab6a4..a10e118 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -949,7 +949,7 @@ split_point_start: // At split points actual search starts from here
       {
           ss->reduction = reduction<PvNode>(depth, moveCount);
 
-          if (!PvNode && cutNode && (ss-1)->reduction)
+          if (!PvNode && cutNode)
               ss->reduction += ONE_PLY;
 
           if (move == countermoves[0] || move == countermoves[1])