From: mckx00 <mckx00@gmail.com>
Date: Mon, 14 Sep 2020 02:28:32 +0000 (-0700)
Subject: Simplify StatSCore Initialization
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=35ab8254b70f62a4e0138c475fad0c77dcc0af2d;hp=0405f3540366cc16245d51531881c55d3726c8b5

Simplify StatSCore Initialization

No need to initialize StatScore at rootNode. Current Logic is redundant because at subsequent levels the grandchildren statScore is initialized to zero.

closes https://github.com/official-stockfish/Stockfish/pull/3122

Non functional change.
---

diff --git a/src/search.cpp b/src/search.cpp
index 4aeadc28..07c491b6 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -654,9 +654,7 @@ namespace {
     // starts with statScore = 0. Later grandchildren start with the last calculated
     // statScore of the previous grandchild. This influences the reduction rules in
     // LMR which are based on the statScore of parent position.
-    if (rootNode)
-        (ss+4)->statScore = 0;
-    else
+    if (!rootNode)
         (ss+2)->statScore = 0;
 
     // Step 4. Transposition table lookup. We don't want the score of a partial