diff --git a/src/ui/flutter/lib/game/battle.dart b/src/ui/flutter/lib/game/battle.dart
index ebdff92d..ff3b5046 100644
--- a/src/ui/flutter/lib/game/battle.dart
+++ b/src/ui/flutter/lib/game/battle.dart
@@ -88,7 +88,7 @@ class Battle {
   }
 
   init() {
-    _position = Position.init();
+    _position = Position();
     _focusIndex = _blurIndex = Move.invalidValue;
   }
 
@@ -96,6 +96,7 @@ class Battle {
     Battle.shared.position.init();
     _focusIndex = _blurIndex = Move.invalidValue;
     cmdlist = [""];
+    sideToMove = Color.black;
   }
 
   select(int pos) {
diff --git a/src/ui/flutter/lib/mill/position.dart b/src/ui/flutter/lib/mill/position.dart
index f4f210b1..8b13388a 100644
--- a/src/ui/flutter/lib/mill/position.dart
+++ b/src/ui/flutter/lib/mill/position.dart
@@ -201,7 +201,7 @@ class Position {
     return false;
   }
 
-  Position.init() {
+  init() {
     for (var i = 0; i < _grid.length; i++) {
       _grid[i] = Piece.noPiece;
     }
@@ -218,16 +218,12 @@ class Position {
     setPosition(rule); // TODO
 
     // TODO
-    score[Color.black] = score[Color.white] = score[Color.draw] = nPlayed = 0;
 
     _recorder = MillRecorder(lastCapturedPosition: fen());
   }
 
-  init() {
-    Position.init();
-  }
-
   Position() {
+    score[Color.black] = score[Color.white] = score[Color.draw] = nPlayed = 0;
     init();
   }
 
diff --git a/src/ui/flutter/lib/routes/battle_page.dart b/src/ui/flutter/lib/routes/battle_page.dart
index 332f53f9..2320d1aa 100644
--- a/src/ui/flutter/lib/routes/battle_page.dart
+++ b/src/ui/flutter/lib/routes/battle_page.dart
@@ -309,7 +309,8 @@ class _BattlePageState extends State<BattlePage> {
     confirm() {
       Navigator.of(context).pop();
       Battle.shared.newGame();
-      setState(() {});
+      //setState(() {});
+      changeStatus('新游戏');
 
       if (Battle.shared.isAIsTurn()) {
         print("New Game: AI's turn.");
@@ -317,7 +318,6 @@ class _BattlePageState extends State<BattlePage> {
       }
 
       //setState(() {});
-      changeStatus('新游戏');
     }
 
     cancel() => Navigator.of(context).pop();