X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fevaluate.cpp;h=35d054270ee7120e1f0438f58867248146053edc;hb=54ad986768eec524aeab721713ea2009931b51b3;hp=cc789e35d893cd2322b4699555df565288b27dfe;hpb=4b085c4777c36939bd0a598f4bc3e0c04606e31b;p=stockfish

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index cc789e35..35d05427 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -1070,13 +1070,9 @@ Value Eval::evaluate(const Position& pos) {
 
       Value nnue = NNUE::evaluate(pos, true, &nnueComplexity);
 
-      // Blend nnue complexity with (semi)classical complexity
-      nnueComplexity = (  397 * nnueComplexity
-                        + (477 + optimism) * abs(psq - nnue)
-                        ) / 1024;
-
-      optimism += optimism * nnueComplexity / 256;
-      v = (nnue * (945 + npm) + optimism * (174 + npm)) / 1024;
+      // Blend optimism with nnue complexity and (semi)classical complexity
+      optimism += optimism * (nnueComplexity + abs(psq - nnue)) / 512;
+      v = (nnue * (945 + npm) + optimism * (150 + npm)) / 1024;
   }
 
   // Damp down the evaluation linearly when shuffling