diff --git a/src/position.cpp b/src/position.cpp
index 2e315411..917d07fa 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -224,6 +224,10 @@ Position &Position::set(const string &fenStr, StateInfo *si, Thread *th)
     Square sq = SQ_A1;
     std::istringstream ss(fenStr);
 
+    if (this->phase != PHASE_NONE && this->phase != PHASE_READY && this->phase != PHASE_GAMEOVER) {
+        goto out;
+    }
+
     std::memset(this, 0, sizeof(Position));
     std::memset(si, 0, sizeof(StateInfo));
     //std::fill_n(&pieceList[0][0], sizeof(pieceList) / sizeof(Square), SQ_NONE);
@@ -301,7 +305,7 @@ Position &Position::set(const string &fenStr, StateInfo *si, Thread *th)
     set_state(st);
 
     assert(pos_is_ok());
-
+out:
     return *this;
 }
 
diff --git a/src/search.cpp b/src/search.cpp
index 855ced1f..00eeaeee 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -265,8 +265,8 @@ int MainThread::search()
                 if (th->rootMoves[0].score > bestThread->rootMoves[0].score)
                     bestThread = th;
             } else if (th->rootMoves[0].score >= VALUE_TB_WIN_IN_MAX_PLY
-                       || (th->rootMoves[0].score > VALUE_TB_LOSS_IN_MAX_PLY
-                           && votes[th->rootMoves[0].pv[0]] > votes[bestThread->rootMoves[0].pv[0]]))
+                      || (th->rootMoves[0].score > VALUE_TB_LOSS_IN_MAX_PLY
+                          && votes[th->rootMoves[0].pv[0]] > votes[bestThread->rootMoves[0].pv[0]]))
                 bestThread = th;
         }
     }
@@ -488,7 +488,7 @@ void MainThread::check_time()
 /// UCI::pv() formats PV information according to the UCI protocol. UCI requires
 /// that all (if any) unsearched PV lines are sent using a previous search score.
 
-string UCI::pv(Position *pos, Depth depth, Value alpha, Value beta)
+string UCI::pv(const Position *pos, Depth depth, Value alpha, Value beta)
 {
 
     std::stringstream ss;
@@ -545,6 +545,7 @@ string UCI::pv(Position *pos, Depth depth, Value alpha, Value beta)
 
 ///////////////////////////////////////////////////////////////////////////////
 
+extern ThreadPool Threads;
 
 vector<Key> moveHistory;
 
diff --git a/src/thread.cpp b/src/thread.cpp
index db661d39..d0ec8217 100644
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -156,7 +156,11 @@ void Thread::idle_loop()
         lk.unlock();
 
         // TODO: Stockfish doesn't have this
-        if (rootPos == nullptr ||  rootPos->side_to_move() != us) {
+        if (
+#ifdef QT_UI
+            //rootPos == nullptr ||
+#endif
+            rootPos->side_to_move() != us) {
             continue;
         }
 
@@ -174,15 +178,13 @@ void Thread::idle_loop()
             if (search() == 3) {
                 loggerDebug("Draw\n\n");
                 strCommand = "draw";
-#ifdef QT_UI
                 emitCommand();
-#endif
             } else {
                 strCommand = nextMove();
                 if (strCommand != "" && strCommand != "error!") {
-#ifdef QT_UI
                     emitCommand();
-#endif
+                } else {
+                    int err = 1;
                 }
             }
 #ifdef OPENING_BOOK
@@ -216,12 +218,17 @@ void Thread::setAi(Position *p, int tl)
     timeLimit = tl;
 }
 
-#ifdef QT_UI
 void Thread::emitCommand()
 {
+#ifdef QT_UI
     emit command(strCommand);
-}
+#else
+    loggerDebug("%s\n", strCommand.c_str());
+    rootPos.command(strCommand.c_str());
+    us = rootPos.side_to_move();
+    analyze(rootPos.side_to_move());
 #endif // QT_UI
+}
 
 #ifdef OPENING_BOOK
 deque<int> openingBookDeque(
@@ -264,6 +271,10 @@ void sq2str(char *str)
 
 void Thread::analyze(Color c)
 {
+    static int nbwin = 0;
+    static int nwwin = 0;
+    static int ndraw = 0;
+
     int d = (int)originDepth;
     int v = (int)bestvalue;
     int lv = (int)lastvalue;
@@ -291,10 +302,13 @@ void Thread::analyze(Color c)
     case PHASE_GAMEOVER:
         if (p->get_winner() == DRAW) {
             cout << "和棋" << endl;
+            ndraw++;
         } else if (p->get_winner() == BLACK) {
             cout << "黑方胜" << endl;
+            nbwin++;
         } else if (p->get_winner() == WHITE) {
             cout << "白方胜" << endl;
+            nwwin++;
         }
         goto out;
         break;
@@ -365,11 +379,13 @@ void Thread::analyze(Color c)
     }
 
     if (p->side_to_move() == BLACK) {
-        cout << "轮到黑方行棋";
+        cout << "轮到黑方行棋" << endl;
     } else {
-        cout << "轮到白方行棋";
+        cout << "轮到白方行棋" << endl;
     }
 
+    cout << "比分: " << nbwin << " : " << nwwin << " : " << ndraw << endl;
+
 out:
     cout << endl << endl;
 }
@@ -506,8 +522,6 @@ void Thread::clearTT()
 
 string Thread::nextMove()
 {
-    return UCI::move(bestMove);
-
 #if 0
     char charSelect = '*';
 
@@ -564,6 +578,8 @@ string Thread::nextMove()
 
     nodeCount = 0;
 
+#endif
+
 #ifdef TRANSPOSITION_TABLE_ENABLE
 #ifdef TRANSPOSITION_TABLE_DEBUG
     size_t hashProbeCount = ttHitCount + ttMissCount;
@@ -574,12 +590,13 @@ string Thread::nextMove()
 #endif // TRANSPOSITION_TABLE_DEBUG
 #endif // TRANSPOSITION_TABLE_ENABLE
 
+#if 0
     if (foundBest == false) {
         loggerDebug("Warning: Best Move NOT Found\n");
     }
-
-    return UCI::move(bestMove).c_str();
 #endif
+
+    return UCI::move(bestMove);
 }
 
 #ifdef ENDGAME_LEARNING
diff --git a/src/uci.cpp b/src/uci.cpp
index 6e6505ad..31f22368 100644
--- a/src/uci.cpp
+++ b/src/uci.cpp
@@ -106,6 +106,7 @@ void setoption(istringstream &is)
 
 void go(Position *pos, istringstream &is, StateListPtr &states)
 {
+begin:
     Search::LimitsType limits;
     string token;
     bool ponderMode = false;
@@ -131,6 +132,8 @@ void go(Position *pos, istringstream &is, StateListPtr &states)
         else if (token == "ponder")    ponderMode = true;
 
     Threads.start_thinking(pos, states, limits, ponderMode);
+
+    goto begin;
 }
 
 
diff --git a/src/uci.h b/src/uci.h
index f99f3629..b750c2f1 100644
--- a/src/uci.h
+++ b/src/uci.h
@@ -73,7 +73,7 @@ void loop(int argc, char* argv[]);
 std::string value(Value v);
 std::string square(Square s);
 std::string move(Move m);
-std::string pv(Position* pos, Depth depth, Value alpha, Value beta);
+std::string pv(const Position* pos, Depth depth, Value alpha, Value beta);
 Move to_move(Position* pos, std::string& str);
 
 } // namespace UCI