Add Tord's polynomial material balance

[stockfish] / src / evaluate.cpp

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 486bb810cb995b6f0a356f95f85ca2a0a09a1abd..ecc73b3543d4963d17a1fa630231a1d4729b195d 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -326,8 +326,8 @@ Value do_evaluate(const Position& pos, EvalInfo& ei, int threadID) {
 
   // Probe the material hash table
   ei.mi = MaterialTable[threadID]->get_material_info(pos);
-  ei.mgValue += ei.mi->mg_value();
-  ei.egValue += ei.mi->eg_value();
+  ei.mgValue += ei.mi->material_value();
+  ei.egValue += ei.mi->material_value();
 
   // If we have a specialized evaluation function for the current material
   // configuration, call it and return
@@ -532,6 +532,14 @@ void read_weights(Color us) {
 
   WeightKingSafety[us]   = weight_option("Cowardice", WeightKingSafetyInternal);
   WeightKingSafety[them] = weight_option("Aggressiveness", WeightKingOppSafetyInternal);
+  // If running in analysis mode, make sure we use symmetrical king safety.
+  // We do this by replacing both WeightKingSafety[us] and 
+  // WeightKingSafety[them] by their average.
+  if (get_option_value_bool("UCI_AnalyseMode")) {
+      WeightKingSafety[us] = (WeightKingSafety[us] + WeightKingSafety[them]) / 2;
+      WeightKingSafety[them] = WeightKingSafety[us];
+  }
+
   WeightSpace = weight_option("Space", WeightSpaceInternal);
 
   init_safety();