X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=216964ab43d5434678695f1f9c88d076cb084243;hp=bb09df984b7d301b9c3c93d6faa9f9eded4a68ec;hb=56273fca1edc51ffa0efc73715609f428c000c97;hpb=64d29a633066e39b62af5ee0bbf32645994744ec

diff --git a/src/search.cpp b/src/search.cpp
index bb09df98..216964ab 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -45,6 +45,7 @@ namespace Search {
   Color RootColor;
   Time::point SearchTime;
   StateStackPtr SetupStates;
+  Value Contempt[2]; // [bestValue > VALUE_DRAW]
 }
 
 using std::string;
@@ -185,9 +186,9 @@ void Search::think() {
   RootColor = RootPos.side_to_move();
   TimeMgr.init(Limits, RootPos.game_ply(), RootColor);
 
-  int cf = Options["Contempt Factor"] * PawnValueMg / 100; // From centipawns
-  DrawValue[ RootColor] = VALUE_DRAW - Value(cf);
-  DrawValue[~RootColor] = VALUE_DRAW + Value(cf);
+  DrawValue[0] = DrawValue[1] = VALUE_DRAW;
+  Contempt[0] =  Options["Contempt Factor"] * PawnValueEg / 100; // From centipawns
+  Contempt[1] = (Options["Contempt Factor"] + 12) * PawnValueEg / 100;
 
   if (RootMoves.empty())
   {
@@ -339,6 +340,9 @@ namespace {
             {
                 bestValue = search<Root>(pos, ss, alpha, beta, depth * ONE_PLY, false);
 
+                DrawValue[ RootColor] = VALUE_DRAW - Contempt[bestValue > VALUE_DRAW];
+                DrawValue[~RootColor] = VALUE_DRAW + Contempt[bestValue > VALUE_DRAW];
+
                 // Bring the best move to the front. It is critical that sorting
                 // is done with a stable algorithm because all the values but the
                 // first and eventually the new best one are set to -VALUE_INFINITE