Update evaluate.cpp

official-pikafish · Oct 20, 2024 · 9c899b6 · 9c899b6
1 parent 9f7bb36
commit 9c899b6
Showing 1 changed file with 7 additions and 5 deletions.
diff --git a/src/evaluate.cpp b/src/evaluate.cpp
@@ -34,6 +34,8 @@
 #include "nnue/nnue_accumulator.h"
 
 namespace Stockfish {
+int evaluate_1 = 556, evaluate_2 = 9359, evaluate_3 = 43, evaluate_4 = 480, evaluate_5 = 107, evaluate_6 = 483, evaluate_7 = 256;
+TUNE(evaluate_1, evaluate_2, evaluate_3, evaluate_4, evaluate_5, evaluate_6, evaluate_7);
 
 // Evaluate is the evaluator for the outer world. It returns a static evaluation
 // of the position from the point of view of the side to move.
@@ -49,14 +51,14 @@ Value Eval::evaluate(const Eval::NNUE::Network& network,
     int   nnueComplexity    = std::abs(psqt - positional);
 
     // Blend optimism and eval with nnue complexity
-    optimism += optimism * nnueComplexity / 556;
-    nnue -= nnue * nnueComplexity / 9359;
+    optimism += optimism * nnueComplexity / (evaluate_1);
+    nnue -= nnue * nnueComplexity / (evaluate_2);
 
-    int mm = pos.major_material() / 43;
-    int v  = (nnue * (480 + mm) + optimism * (107 + mm)) / 483;
+    int mm = pos.major_material() / (evaluate_3);
+    int v  = (nnue * ((evaluate_4) + mm) + optimism * ((evaluate_5) + mm)) / (evaluate_6);
 
     // Damp down the evaluation linearly when shuffling
-    v -= (v * pos.rule60_count()) / 256;
+    v -= (v * pos.rule60_count()) / (evaluate_7);
 
     // Guarantee evaluation does not hit the mate range
     v = std::clamp(v, VALUE_MATED_IN_MAX_PLY + 1, VALUE_MATE_IN_MAX_PLY - 1);