X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=af0946ea577722b5f3aaab25fb5f176bae8dc094;hp=1a516ff80b1e7a1c7a95d9d1ac9c9cfd8412e167;hb=9953bfff621b287f5e08139f51d6663c2620db1e;hpb=a03e98dcd33c91c47e4a06282bfb582e582671b7

diff --git a/src/search.cpp b/src/search.cpp
index 1a516ff8..af0946ea 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -160,7 +160,7 @@ void Search::init() {
               Reductions[PV][imp][d][mc] = std::max(Reductions[NonPV][imp][d][mc] - 1, 0);
 
               // Increase reduction for non-PV nodes when eval is not improving
-              if (!imp && Reductions[NonPV][imp][d][mc] >= 2)
+              if (!imp && r > 1.0)
                 Reductions[NonPV][imp][d][mc]++;
           }
 
@@ -343,14 +343,15 @@ void Thread::search() {
           // Reset aspiration window starting size
           if (rootDepth >= 5 * ONE_PLY)
           {
+              Value previousScore = rootMoves[PVIdx].previousScore;
               delta = Value(18);
-              alpha = std::max(rootMoves[PVIdx].previousScore - delta,-VALUE_INFINITE);
-              beta  = std::min(rootMoves[PVIdx].previousScore + delta, VALUE_INFINITE);
+              alpha = std::max(previousScore - delta,-VALUE_INFINITE);
+              beta  = std::min(previousScore + delta, VALUE_INFINITE);
 
               ct =  Options["Contempt"] * PawnValueEg / 100; // From centipawns
 
-              // Adjust contempt based on current bestValue (dynamic contempt)
-              ct += int(std::round(48 * atan(float(bestValue) / 128)));
+              // Adjust contempt based on root move's previousScore (dynamic contempt)
+              ct += int(std::round(48 * atan(float(previousScore) / 128)));
 
               Eval::Contempt = (us == WHITE ?  make_score(ct, ct / 2)
                                             : -make_score(ct, ct / 2));