Tweaks. Bench: 2995670

Stefano80 · Mar 16, 2019 · bb5a21f · bb5a21f
1 parent 8ae9f97
commit bb5a21f
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Showing 2 changed files with 11 additions and 6 deletions.
diff --git a/src/search.cpp b/src/search.cpp
@@ -1058,16 +1058,21 @@ namespace {
           }
 
           // Predict using a perceptron
-          features[0] =  float(inCheck) ;
-          features[1] =  float(givesCheck) ;
+          features[0] =  float(improving);
+          features[1] =  float(inCheck);
           features[2] =  float(captureOrPromotion) ;
           features[3] = -float(cutNode);
-          prediction  = thisThread->infer(features);
+          features[4] =  float(givesCheck);
+          features[5] =  float(improving * cutNode);
+          features[6] =  float(improving * ttCapture);
+          features[7] = -float(ttCapture);
 
-          int threshold = 4500;
+          prediction  =  thisThread->infer(features);
+
+          int threshold = 4550;
           if (thisThread->perceptronAccuracy > threshold)
             r -= prediction * ONE_PLY * (thisThread->perceptronAccuracy - threshold) / 100;
-
+          
           Depth d = std::max(newDepth - std::max(r, DEPTH_ZERO), ONE_PLY);
 
           value = -search<NonPV>(pos, ss+1, -(alpha+1), -alpha, d, true);

diff --git a/src/types.h b/src/types.h
@@ -254,7 +254,7 @@ enum Rank : int {
 };
 
 enum Perceptron : int {
-  PercInput  = 4,
+  PercInput  = 8,
 };
 
 /// Score enum stores a middlegame and an endgame value in a single integer (enum).