From: Marco Costalba <mcostalba@gmail.com>
Date: Mon, 21 Feb 2011 11:45:51 +0000 (+0100)
Subject: Correctly round evaluation to grain size
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=dd718d92a762fabeaed09d755474fcdd260392a2

Correctly round evaluation to grain size

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

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 3c0be19d..53afc447 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -1105,7 +1105,7 @@ namespace {
     Value ev = Value((eg * int(sf)) / SCALE_FACTOR_NORMAL);
 
     int result = (mg_value(v) * int(ph) + ev * int(128 - ph)) / 128;
-    return Value(result & ~(GrainSize - 1));
+    return Value((result + GrainSize / 2) & ~(GrainSize - 1));
   }