Restore development version

No functional change.

polyglot.ini

@@ -29,7 +29,7 @@ Cowardice = 100
 Min Split Depth = 4
 Max Threads per Split Point = 5
 Threads = 1
-Use Sleeping Threads = false
+Use Sleeping Threads = true
 Hash = 128
 Ponder = true
 OwnBook = false

src/misc.cpp

@@ -33,7 +33,7 @@ using namespace std;
 /// Version number. If Version is left empty, then Tag plus current
 /// date (in the format YYMMDD) is used as a version number.
 
-static const string Version = "2.3";
+static const string Version = "";
 static const string Tag = "";
 
 

src/uci.cpp

@@ -26,6 +26,7 @@
 #include "position.h"
 #include "search.h"
 #include "thread.h"
+#include "tt.h"
 #include "ucioption.h"
 
 using namespace std;
@@ -93,7 +94,7 @@ void UCI::loop(const string& args) {
           go(pos, is);
 
       else if (token == "ucinewgame")
-      { /* Avoid returning "Unknown command" */ }
+          TT.clear();
 
       else if (token == "isready")
           sync_cout << "readyok" << sync_endl;

src/ucioption.cpp

@@ -74,7 +74,7 @@ void init(OptionsMap& o) {
   o["Min Split Depth"]             = Option(msd, 4, 7, on_threads);
   o["Max Threads per Split Point"] = Option(5, 4, 8, on_threads);
   o["Threads"]                     = Option(cpus, 1, MAX_THREADS, on_threads);
-  o["Use Sleeping Threads"]        = Option(false, on_threads);
+  o["Use Sleeping Threads"]        = Option(true, on_threads);
   o["Hash"]                        = Option(32, 4, 8192, on_hash_size);
   o["Clear Hash"]                  = Option(on_clear_hash);
   o["Ponder"]                      = Option(true);