X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fevaluate.cpp;h=d20c7b70f1e12407a4b58a6524469422b252f040;hb=dc5af66eadf3cbe3c3ef106657e561c1aa8ac97f;hp=f43c62d687118d812761fc7e992b0ee2639243a3;hpb=84f3e867903f62480c33243dd0ecbffd342796fc;p=stockfish

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index f43c62d6..d20c7b70 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -107,9 +107,10 @@ using namespace Trace;
 namespace {
 
   // Threshold for lazy and space evaluation
-  constexpr Value LazyThreshold1  = Value(1400);
-  constexpr Value LazyThreshold2  = Value(1300);
+  constexpr Value LazyThreshold1 =  Value(1400);
+  constexpr Value LazyThreshold2 =  Value(1300);
   constexpr Value SpaceThreshold = Value(12222);
+  constexpr Value NNUEThreshold  =   Value(500);
 
   // KingAttackWeights[PieceType] contains king attack weights by piece type
   constexpr int KingAttackWeights[PIECE_TYPE_NB] = { 0, 0, 81, 52, 44, 10 };
@@ -180,7 +181,6 @@ namespace {
   constexpr Score MinorBehindPawn     = S( 18,  3);
   constexpr Score PassedFile          = S( 11,  8);
   constexpr Score PawnlessFlank       = S( 17, 95);
-  constexpr Score QueenInfiltration   = S( -2, 14);
   constexpr Score ReachableOutpost    = S( 31, 22);
   constexpr Score RestrictedPiece     = S(  7,  7);
   constexpr Score RookOnKingRing      = S( 16,  0);
@@ -422,10 +422,6 @@ namespace {
             Bitboard queenPinners;
             if (pos.slider_blockers(pos.pieces(Them, ROOK, BISHOP), s, queenPinners))
                 score -= WeakQueen;
-
-            // Bonus for queen on weak square in enemy camp
-            if (relative_rank(Us, s) > RANK_4 && (~pe->pawn_attacks_span(Them) & s))
-                score += QueenInfiltration;
         }
     }
     if (T)
@@ -941,9 +937,14 @@ make_v:
 Value Eval::evaluate(const Position& pos) {
 
   if (Eval::useNNUE)
-      return NNUE::evaluate(pos);
-  else
-      return Evaluation<NO_TRACE>(pos).value();
+  {
+      Value balance = pos.non_pawn_material(WHITE) - pos.non_pawn_material(BLACK);
+      balance += 200 * (pos.count<PAWN>(WHITE) - pos.count<PAWN>(BLACK));
+      // Take NNUE eval only on balanced positions
+      if (abs(balance) < NNUEThreshold)
+         return NNUE::evaluate(pos) + Tempo;
+  }
+  return Evaluation<NO_TRACE>(pos).value();
 }
 
 /// trace() is like evaluate(), but instead of returning a value, it returns