diff --git a/src/position.cpp b/src/position.cpp
index d879b253..58650913 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -169,8 +169,7 @@ Position::Position()
 {
     construct_key();
     
-    // TODO: Do not need to set again
-    set_position(DEFAULT_RULE_NUMBER);
+    reset();
 
     score[BLACK] = score[WHITE] = score_draw = nPlayed = 0;
 
@@ -708,43 +707,6 @@ int Position::pieces_in_hand_count()
     return pieceCountInHand[BLACK] + pieceCountInHand[WHITE];
 }
 
-int Position::set_position(int ruleNo)
-{
-    memset(&rule, 0, sizeof(Rule));
-    memcpy(&rule, &RULES[ruleNo], sizeof(Rule));
-
-    gamePly = 0;
-    st.rule50 = 0;
-
-    phase = PHASE_READY;
-    set_side_to_move(BLACK);
-    action = ACTION_PLACE;
-
-    memset(board, 0, sizeof(board));
-    st.key = 0;
-    memset(byTypeBB, 0, sizeof(byTypeBB));
-
-    if (pieces_on_board_count() == -1) {
-        return -1;
-    }
-
-    pieces_in_hand_count();
-    pieceCountNeedRemove = 0;
-    millListSize = 0;
-    winner = NOBODY;
-    MoveList<LEGAL>::create();
-    create_mill_table();
-    currentSquare = SQ_0;
-
-    int r;
-    for (r = 0; r < N_RULES; r++) {
-        if (strcmp(rule.name, RULES[r].name) == 0)
-            return r;
-    }
-
-    return -1;
-}
-
 #ifdef THREEFOLD_REPETITION
 extern int nRepetition;
 #endif // THREEFOLD_REPETITION
@@ -773,6 +735,9 @@ bool Position::reset()
     pieceCountInHand[BLACK] = pieceCountInHand[WHITE] = rule.nTotalPiecesEachSide;
     pieceCountNeedRemove = 0;
     millListSize = 0;
+
+    MoveList<LEGAL>::create();
+    create_mill_table();
     currentSquare = SQ_0;
 
 #ifdef ENDGAME_LEARNING
@@ -781,15 +746,14 @@ bool Position::reset()
     }
 #endif /* ENDGAME_LEARNING */
 
-    int i;
-
-    for (i = 0; i < N_RULES; i++) {
-        if (strcmp(rule.name, RULES[i].name) == 0)
+    int r;
+    for (r = 0; r < N_RULES; r++) {
+        if (strcmp(rule.name, RULES[r].name) == 0)
             break;
     }
 
     if (sprintf(cmdline, "r%1u s%03u t%02u",
-                i + 1, rule.maxStepsLedToDraw, 0) > 0) {
+                r + 1, rule.maxStepsLedToDraw, 0) > 0) {
         return true;
     }
 
@@ -1073,11 +1037,11 @@ bool Position::command(const char *cmd)
     int args = 0;
 
     if (sscanf(cmd, "r%1u s%3d t%2u", &ruleNo, &step, &t) == 3) {
-        if (ruleNo <= 0 || ruleNo > N_RULES) {
+        if (set_rule(ruleNo - 1) == false) {
             return false;
         }
 
-        return set_position(ruleNo - 1) >= 0 ? true : false;
+        return reset();
     }
 
     args = sscanf(cmd, "(%1u,%1u)->(%1u,%1u)", (unsigned*)&file1, (unsigned*)&rank1, (unsigned*)&file2, (unsigned*)&rank2);
diff --git a/src/position.h b/src/position.h
index be469468..da77a850 100644
--- a/src/position.h
+++ b/src/position.h
@@ -104,8 +104,6 @@ public:
 
     /// Mill Game
 
-    int set_position(int ruleNo);
-
     Piece *get_board();
     Square current_square() const;
     enum Phase get_phase() const;
diff --git a/src/rule.cpp b/src/rule.cpp
index f696ab69..61bd2d2e 100644
--- a/src/rule.cpp
+++ b/src/rule.cpp
@@ -125,3 +125,15 @@ const struct Rule RULES[N_RULES] = {
         50          // 50步
     }
 };
+
+bool set_rule(int ruleIdx)
+{
+    if (ruleIdx <= 0 || ruleIdx > N_RULES) {
+        return false;
+    }
+
+    memset(&rule, 0, sizeof(Rule));
+    memcpy(&rule, &RULES[ruleIdx], sizeof(Rule));
+
+    return true;
+}
diff --git a/src/rule.h b/src/rule.h
index d5f03431..c36e292b 100644
--- a/src/rule.h
+++ b/src/rule.h
@@ -42,5 +42,6 @@ struct Rule
 #define N_RULES 4
 extern const struct Rule RULES[N_RULES];
 extern struct Rule rule;
+extern bool set_rule(int ruleIdx);
 
 #endif /* RULE_H */
diff --git a/src/ui/qt/game.cpp b/src/ui/qt/game.cpp
index 66c6bd9a..31701fa3 100644
--- a/src/ui/qt/game.cpp
+++ b/src/ui/qt/game.cpp
@@ -353,7 +353,11 @@ void Game::setRule(int ruleNo, int stepLimited /*= -1*/, int timeLimited /*= -1*
     }
 
     // 设置模型规则，重置游戏
-    int r = position.set_position(ruleNo);
+    if (set_rule(ruleNo) == false) {
+        return;
+    }
+
+    int r = ruleNo;
     elapsedSeconds[BLACK] = elapsedSeconds[WHITE] = 0;
 
     char cmdline[64] = { 0 };