Update Elo estimates for terms in search

[stockfish] / src / evaluate.cpp

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index c1d3d159b6fa0de652da30c638c2823bf2f99cdf..28689f1d4167a33f55c7adf343abbdefda5099a1 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -1083,7 +1083,7 @@ Value Eval::evaluate(const Position& pos) {
 
   Value v;
 
-  // Deciding between classical and NNUE eval: for high PSQ imbalance we use classical,
+  // Deciding between classical and NNUE eval (~10 Elo): for high PSQ imbalance we use classical,
   // but we switch to NNUE during long shuffling or with high material on the board.
 
   if (  !useNNUE
@@ -1091,9 +1091,8 @@ Value Eval::evaluate(const Position& pos) {
       v = Evaluation<NO_TRACE>(pos).value();          // classical
   else
   {
-       int scale =   898
-                   + 24 * pos.count<PAWN>()
-                   + 33 * pos.non_pawn_material() / 1024;
+       int scale = 1136
+                   + 20 * pos.non_pawn_material() / 1024;
 
        Value nnue     = NNUE::evaluate(pos, true);     // NNUE
        Color stm      = pos.side_to_move();