From: Marco Costalba <mcostalba@gmail.com>
Date: Sat, 1 May 2010 05:12:04 +0000 (+0100)
Subject: Do not refresh TT in qsearch
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=80f5ca88f6eaead0c5460c4bc13c1c7d9477c2be;hp=8425b2b4997c90aaad35ced6ab190df098f24212

Do not refresh TT in qsearch

Almost no change and simplifies a bit the code.

After 961 games at 1+0
Mod vs Orig +156 =650 -146  +4 ELO

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---

diff --git a/src/search.cpp b/src/search.cpp
index 1f980fbb..ec884b3c 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1627,9 +1627,6 @@ namespace {
     {
         assert(tte->type() != VALUE_TYPE_EVAL);
 
-        // Refresh tte entry to avoid aging
-        TT.store(pos.get_key(), tte->value(), tte->type(), tte->depth(), ttMove);
-
         ss[ply].currentMove = ttMove; // Can be MOVE_NONE
         return value_from_tt(tte->value(), ply);
     }