From: VoyagerOne <excelgeek@gmail.com>
Date: Tue, 22 May 2018 05:21:57 +0000 (+0200)
Subject: Simply reset StatScore to zero at beta cutoff
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=04407e35d67959b2e9011aa6aff43e2bb632b189

Simply reset StatScore to zero at beta cutoff

STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 43154 W: 8706 L: 8625 D: 25823
http://tests.stockfishchess.org/tests/view/5b01a7660ebc5914abc1271d

LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 48155 W: 7036 L: 6955 D: 34164
http://tests.stockfishchess.org/tests/view/5b01b2e50ebc5914abc1272c

Closes https://github.com/official-stockfish/Stockfish/pull/1608

Bench: 4484288
---

diff --git a/src/search.cpp b/src/search.cpp
index 025c1141..5fd016a6 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1117,7 +1117,7 @@ moves_loop: // When in check, search starts from here
               else
               {
                   assert(value >= beta); // Fail high
-                  ss->statScore = std::max(ss->statScore, 0);
+                  ss->statScore = 0;
                   break;
               }
           }