Make contempt configurable.

dshawul · Aug 16, 2019 · 86a0f60 · 86a0f60
1 parent 70be704
commit 86a0f60
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Showing 3 changed files with 9 additions and 4 deletions.
diff --git a/bin/scorpio.ini b/bin/scorpio.ini
@@ -1,9 +1,11 @@
-#############################################
+###################################################
 # log on/off   - turn logging on and off
 # resign       - resign value in centipawns
-#############################################
+# contempt     - +ve value discourages drawishness
+###################################################
 log                 off
 resign              800
+contempt            10
 ##################################################################
 # Hashtable sizes in mb.
 #      ht - main hash table shared by ALL threads

diff --git a/src/scorpio.h b/src/scorpio.h
@@ -1081,7 +1081,7 @@ extern const int use_tt;
 extern const int use_aspiration;
 extern const int use_iid;
 extern const int use_pvs;
-extern const int contempt;
+extern int contempt;
 
 /*
 utility functions

diff --git a/src/search.cpp b/src/search.cpp
@@ -15,7 +15,7 @@ const int use_tt = 1;
 const int use_aspiration = 1;
 const int use_iid = 1;
 const int use_pvs = 1;
-const int contempt = 2;
+int contempt = 10;
 
 /* parameter */
 #ifdef TUNE
@@ -1919,6 +1919,8 @@ bool check_search_params(char** commands,char* command,int& command_num) {
     } else if(!strcmp(command, "aspiration_window")) {
         aspiration_window = atoi(commands[command_num++]);
 #endif
+    } else if(!strcmp(command, "contempt")) {
+        contempt = atoi(commands[command_num++]);
     } else if(!strcmp(command, "smp_type")) {
         command = commands[command_num++];
 #ifdef PARALLEL
@@ -1958,4 +1960,5 @@ void print_search_params() {
     print("feature option=\"singular_margin -spin %d 0 1000\"\n",singular_margin);
     print("feature option=\"probcut_margin -spin %d 0 1000\"\n",probcut_margin);
     print("feature option=\"aspiration_window -spin %d 0 100\"\n",aspiration_window);
+    print("feature option=\"contempt -spin %d 0 100\"\n",contempt);
 }