Update the default net to nn-76a8a7ffb820.nnue.

[stockfish] / src / evaluate.cpp

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index f9754795603bd413b38cce6a565d2e23777426b8..64f9172574a4d7fda710a4ffde587e9ea4fc065d 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -190,8 +190,8 @@ using namespace Trace;
 namespace {
 
   // Threshold for lazy and space evaluation
-  constexpr Value LazyThreshold1    =  Value(1565);
-  constexpr Value LazyThreshold2    =  Value(1102);
+  constexpr Value LazyThreshold1    =  Value(3130);
+  constexpr Value LazyThreshold2    =  Value(2204);
   constexpr Value SpaceThreshold    =  Value(11551);
 
   // KingAttackWeights[PieceType] contains king attack weights by piece type
@@ -986,7 +986,7 @@ namespace {
 
     // Early exit if score is high
     auto lazy_skip = [&](Value lazyThreshold) {
-        return abs(mg_value(score) + eg_value(score)) / 2 > lazyThreshold + pos.non_pawn_material() / 64;
+        return abs(mg_value(score) + eg_value(score)) > lazyThreshold + pos.non_pawn_material() / 32;
     };
 
     if (lazy_skip(LazyThreshold1))
@@ -1090,7 +1090,7 @@ Value Eval::evaluate(const Position& pos) {
       // Scale and shift NNUE for compatibility with search and classical evaluation
       auto  adjusted_NNUE = [&]()
       {
-         int scale =   903
+         int scale =   883
                      + 32 * pos.count<PAWN>()
                      + 32 * pos.non_pawn_material() / 1024;
 
@@ -1106,7 +1106,7 @@ Value Eval::evaluate(const Position& pos) {
       // NNUE eval faster when shuffling or if the material on the board is high.
       int r50 = pos.rule50_count();
       Value psq = Value(abs(eg_value(pos.psq_score())));
-      bool classical = psq * 5 > (750 + pos.non_pawn_material() / 64) * (5 + r50);
+      bool classical = psq * 5 > (850 + pos.non_pawn_material() / 64) * (5 + r50);
 
       v = classical ? Evaluation<NO_TRACE>(pos).value()  // classical
                     : adjusted_NNUE();                   // NNUE