- if (Eval::useNNUE)
- {
- Value v = eg_value(pos.psq_score());
- // Take NNUE eval only on balanced positions
- if (abs(v) < NNUEThreshold)
- return NNUE::evaluate(pos) + Tempo;
- }
- return Evaluation<NO_TRACE>(pos).value();
+ bool classical = !Eval::useNNUE
+ || abs(eg_value(pos.psq_score())) >= NNUEThreshold;
+ Value v = classical ? Evaluation<NO_TRACE>(pos).value()
+ : NNUE::evaluate(pos) + Tempo;
+
+ // Damp down the evaluation linearly when shuffling
+ v = v * (100 - pos.rule50_count()) / 100;
+
+ return v;