From 81e9cf043a7e8ac1aeb579e6ad17c695f7fb3d47 Mon Sep 17 00:00:00 2001
From: Marco Costalba <mcostalba@gmail.com>
Date: Fri, 22 Mar 2013 20:57:31 +0100
Subject: [PATCH 1/1] Increase non-PV IID search depth

bench: 5146380
---
 src/search.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/search.cpp b/src/search.cpp
index 7a06dad9..8ef2513d 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -745,7 +745,7 @@ namespace {
         && ttMove == MOVE_NONE
         && (PvNode || (!inCheck && ss->staticEval + Value(256) >= beta)))
     {
-        Depth d = (PvNode ? depth - 2 * ONE_PLY : depth / 2);
+        Depth d = (PvNode ? depth - 2 * ONE_PLY : depth - 4 * ONE_PLY);
 
         ss->skipNullMove = true;
         search<PvNode ? PV : NonPV>(pos, ss, alpha, beta, d);
-- 
2.39.2