diff --git a/include/config.h b/include/config.h
index ba2364fb..bd3744b9 100644
--- a/include/config.h
+++ b/include/config.h
@@ -40,6 +40,8 @@
 #define EMIT_COMMAND_DELAY (0)
 #endif
 
+#define DEFAULT_RULE_NUMBER 1
+
 //#define HARD_LEVEL_DEPTH
 
 //#define TIME_STAT
diff --git a/src/game/position.cpp b/src/game/position.cpp
index 53d59ce5..3ea3f67c 100644
--- a/src/game/position.cpp
+++ b/src/game/position.cpp
@@ -42,8 +42,8 @@ Game::Game()
     }    
 #endif
 
-    // 默认选择第3号规则，即“莫里斯九子棋”
-    setPosition(&RULES[3]);
+    // 默认规则
+    setPosition(&RULES[DEFAULT_RULE_NUMBER]);
 
     // 比分归零
     score[BLACK] = score[WHITE] = score_draw = 0;
diff --git a/src/ui/qt/gamewindow.cpp b/src/ui/qt/gamewindow.cpp
index 6a256c0f..a19057eb 100644
--- a/src/ui/qt/gamewindow.cpp
+++ b/src/ui/qt/gamewindow.cpp
@@ -270,8 +270,8 @@ void MillGameWindow::initialize()
     connect(gameController, SIGNAL(statusBarChanged(QString)),
             statusBarlabel, SLOT(setText(QString)));
 
-    // 默认第3号规则
-    ruleNo = 3;
+    // 默认规则
+    ruleNo = DEFAULT_RULE_NUMBER;
     ruleActionList.at(ruleNo)->setChecked(true);
 
     // 重置游戏规则