Game: Cho-Chikun-vs-Cho-Hunhyun-20150726
          Event: Korean Baduk 70th Anniversary Match
          Date: 2015-07-26
          Commentor: An Younggil 8p
          Kifu Source: https://gogameguru.com/
       
          - - -
       
          Black ( X ): Cho Chikun - 9p
       
          White ( O ): Cho Hunhyun - 9p
       
          Komi: 6.50
          Time: 1800
          Rules: Japanese
       
       
       
       Move #40
       
          A B C D E F G H I J K L M N O P Q R S
        1 . . . . . . . . . . . . . . . . . . .
        2 . . . . . . . . . . . . . . . . . . .
        3 . . . . . . . . . . . . . O O O O X .
        4 . . . O . . . . . . . . . . X O X . .
        5 . . . . . . . . . . . . . . . X . X .
        6 . . . . . . . . . . . . . O . X X . .
        7 . . . . . . . . . . . . . . O O O . .
        8 . . . . . . . . . . . . . . X X O . .
        9 . . . . . . . . . . . . . . X O . O .
       10 . . . . . . . . . . . . . X O O . X .
       11 . . . . . . . . . . . . . X . . X . .
       12 . . . . . . . . . . . O . O O O . . .
       13 . . . . . . . . . . . . . . . . X . .
       14 . . . . . . . . . . . . . . . X . . .
       15 . . . . . . . . . . . . . . . . . . .
       16 . . . X . . . . . . X . . . . X . . .
       17 . . . . . . . . . O X . . . . . . . .
       18 . . . . . . . . . . . . . . . . . . .
       19 . . . . . . . . . . . . . . . . . . .
       
       Black 39 was necessary to save this group, and White 40 was also necessary to complete this area.
       
       All of sudden, all of White's stones become solid and strong with White 40, and the game become even . That's why Black should have connected at 38 instead of Black 37.
       
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