From d0b8bc5fdfae9efe75b9828ac72340f13718ebb4 Mon Sep 17 00:00:00 2001
From: Joona Kiiski <joona.kiiski@gmail.com>
Date: Tue, 8 Dec 2009 19:06:38 +0200
Subject: [PATCH 1/1] Disable insert_pv

This way we avoid overwriting valuable TT entries which
are needed to calculate exclusion search extension for pv.

Mod - Orig: 483 - 410 (+28 elo!)

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---
 src/search.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/search.cpp b/src/search.cpp
index 96a945e6..7bacb89c 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -743,7 +743,7 @@ namespace {
 
         // Write PV to transposition table, in case the relevant entries have
         // been overwritten during the search.
-        TT.insert_pv(p, ss[0].pv);
+        //TT.insert_pv(p, ss[0].pv);
 
         if (AbortSearch)
             break; // Value cannot be trusted. Break out immediately!
-- 
2.39.2