X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fevaluate.cpp;h=c37dd98ad1c257a892930ca42385a0a2642fb5f0;hb=0ad9b51deaaa1f2a8273ed064fbf6425cfbbe4f2;hp=7f0ea4bc6040c4d38d0958fe0b3e61eeafe5a5de;hpb=a6d9a302b867a76c3df5b658de6206e77b649a4d;p=stockfish

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 7f0ea4bc..c37dd98a 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -143,7 +143,6 @@ Value Eval::evaluate(const Position& pos) {
   assert(!pos.checkers());
 
   Value v;
-  Value psq = pos.psq_eg_stm();
 
   int nnueComplexity;
   int npm = pos.non_pawn_material() / 64;
@@ -153,8 +152,14 @@ Value Eval::evaluate(const Position& pos) {
 
   Value nnue = NNUE::evaluate(pos, true, &nnueComplexity);
 
+  int material =   67 * (pos.count<PAWN>(stm)   - pos.count<PAWN>(~stm))
+                + 395 * (pos.count<KNIGHT>(stm) - pos.count<KNIGHT>(~stm))
+                + 288 * (pos.count<BISHOP>(stm) - pos.count<BISHOP>(~stm))
+                + 630 * (pos.count<ROOK>(stm)   - pos.count<ROOK>(~stm))
+                + 857 * (pos.count<QUEEN>(stm)  - pos.count<QUEEN>(~stm));
+
   // Blend optimism with nnue complexity and (semi)classical complexity
-  optimism += optimism * (nnueComplexity + abs(psq - nnue)) / 512;
+  optimism += optimism * (nnueComplexity + abs(material - nnue)) / 512;
 
   v = (  nnue     * (915 + npm + 9 * pos.count<PAWN>())
        + optimism * (154 + npm +     pos.count<PAWN>())) / 1024;