Revert Contempt = 20

lucasart · lucasart · commit 7f68fc611cc0 · 2014-07-20T08:50:54.000+08:00
Despite being neutral at STC, it turned out to be regressive at LTC:

40k games at LTC with Hash=8
ELO: -2.06 +-1.9 (95%) LOS: 1.4%
Total: 39720 W: 5740 L: 5976 D: 28004

40k games at LTC with Hash=128
ELO: -2.69 +-1.9 (95%) LOS: 0.2%
Total: 39149 W: 5702 L: 6005 D: 27442

bench 7477963
diff --git a/src/ucioption.cpp b/src/ucioption.cpp
@@ -57,7 +57,7 @@ void init(OptionsMap& o) {
   o["Write Debug Log"]          << Option(false, on_logger);
   o["Write Search Log"]         << Option(false);
   o["Search Log Filename"]      << Option("SearchLog.txt");
-  o["Contempt Factor"]          << Option(20, -100,  100);
+  o["Contempt Factor"]          << Option(0, -100,  100);
   o["Min Split Depth"]          << Option(0, 0, 12, on_threads);
   o["Threads"]                  << Option(1, 1, MAX_THREADS, on_threads);
   o["Hash"]                     << Option(32, 1, 1024 * 1024, on_hash_size);
