X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=d7980bd7ab1d2ef23b7770e1344a7398a46d4c00;hp=897121fdc63570925ca02515c135fd8dd4e47bc1;hb=aef7076c344881954b4f586bd4779594d0b29037;hpb=82f7d507eaf83e27a33bf0b433be08d23320b6fe

diff --git a/src/search.cpp b/src/search.cpp
index 897121fd..d7980bd7 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -92,7 +92,7 @@ namespace {
   // History and stats update bonus, based on depth
   int stat_bonus(Depth depth) {
     int d = depth / ONE_PLY;
-    return d > 17 ? 0 : d * d + 2 * d - 2;
+    return d > 17 ? 0 : 32 * d * d + 64 * d - 64;
   }
 
   // Skill structure is used to implement strength limit
@@ -379,7 +379,7 @@ void Thread::search() {
               beta  = std::min(previousScore + delta, VALUE_INFINITE);
 
               // Adjust contempt based on root move's previousScore (dynamic contempt)
-              int dct = ct + int(std::round(48 * atan(float(previousScore) / 128)));
+              int dct = ct + 88 * previousScore / (abs(previousScore) + 200);
 
               contempt = (us == WHITE ?  make_score(dct, dct / 2)
                                       : -make_score(dct, dct / 2));