Clear transposition table on "ucinewgame"

It seems the standard behaviour as implemented
in most engines although UCI protocol does not
specify what to do upon "ucinewgame" command.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

diff --git a/src/uci.cpp b/src/uci.cpp
index 0ba4de3bddeb3cb9dd8c87eab097ed0a41afe00c..7b7b116ee233999760f381c6e960b57a284739eb 100644 (file)
--- a/src/uci.cpp
+++ b/src/uci.cpp
@@ -25,6 +25,7 @@
 #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")
           cout << "readyok" << endl;