diff --git a/第6讲太阳系/课堂成果/井字棋.py b/第6讲太阳系/课堂成果/井字棋.py
index b21d3c8..ac05409 100644
--- a/第6讲太阳系/课堂成果/井字棋.py
+++ b/第6讲太阳系/课堂成果/井字棋.py
@@ -19,7 +19,7 @@ class SneakyTicTacToe:
                 self.buttons[i][j] = btn
 
         # 默认只设置窗口足够显示中心3x3
-        root.geometry(f"{3*65}x{3*65}")  # 宽x高像素，+40 留状态栏
+        root.geometry(f"{3*65}x{3*63}")  # 宽x高像素，+40 留状态栏
 
     def on_click(self, r, c):
         if self.board[r][c] != "":