X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fevaluate.cpp;h=54216b97206b24cab5b90ba18601a3e9d5801df9;hb=4c4cb185aaaa0b3175ca35ab6473f17e9ec64055;hp=728990680f6a1ac9e6fdd8df0e88a29ee327c7b3;hpb=9b80897657bde99cfb6568d8bd3386c3999f22c4;p=stockfish

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 72899068..54216b97 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -155,8 +155,9 @@ Value Eval::evaluate(const Position& pos) {
   int material =  pos.non_pawn_material(stm) - pos.non_pawn_material(~stm)
                 + 126 * (pos.count<PAWN>(stm) - pos.count<PAWN>(~stm));
 
-  // Blend optimism with nnue complexity and (semi)classical complexity
+  // Blend optimism and eval with nnue complexity and material imbalance
   optimism += optimism * (nnueComplexity + abs(material - nnue)) / 512;
+  nnue     -= nnue     * (nnueComplexity + abs(material - nnue)) / 32768;
 
   v = (  nnue     * (915 + npm + 9 * pos.count<PAWN>())
        + optimism * (154 + npm +     pos.count<PAWN>())) / 1024;