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 bfab6a4e1cd2829408f1e0d849f3962ab9fd77db..a10e1180c344a3af45a23bf293386d27cc48ddbf 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])