Analysis Contempt combo box

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 50f3a01b5c2bdf54c97ab935c4f134aee67bf95e..ad54a7265417d12e4ea7994b4ea3baf34855af43 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -319,6 +319,16 @@ void Thread::search() {
   multiPV = std::min(multiPV, rootMoves.size());
 
   int ct = Options["Contempt"] * PawnValueEg / 100; // From centipawns
+
+  // In analysis mode, adjust contempt in accordance with user preference
+  if (Limits.infinite || Options["UCI_AnalyseMode"])
+      ct =  Options["Analysis Contempt"] == "Off"  ? 0
+          : Options["Analysis Contempt"] == "Both" ? ct
+          : Options["Analysis Contempt"] == "White" && us == BLACK ? -ct
+          : Options["Analysis Contempt"] == "Black" && us == WHITE ? -ct
+          : ct;
+
+  // In evaluate.cpp the evaluation is from the white point of view
   contempt = (us == WHITE ?  make_score(ct, ct / 2)
                           : -make_score(ct, ct / 2));
 
@@ -358,13 +368,11 @@ void Thread::search() {
               alpha = std::max(previousScore - delta,-VALUE_INFINITE);
               beta  = std::min(previousScore + delta, VALUE_INFINITE);
 
-              ct =  Options["Contempt"] * PawnValueEg / 100; // From centipawns
-
               // Adjust contempt based on root move's previousScore (dynamic contempt)
-              ct += int(std::round(48 * atan(float(previousScore) / 128)));
+              int dct = ct + int(std::round(48 * atan(float(previousScore) / 128)));
 
-              contempt = (us == WHITE ?  make_score(ct, ct / 2)
-                                      : -make_score(ct, ct / 2));
+              contempt = (us == WHITE ?  make_score(dct, dct / 2)
+                                      : -make_score(dct, dct / 2));
           }
 
           // Start with a small aspiration window and, in the case of a fail