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七死八活

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七死八活圍棋裡的一個術語,是死活中的常見棋形,七和八指的是在二路連成直線的棋子數。如果在周圍被圍死的情況下,七子是先手活、後手死,八子可以後手活。但是,该术语并不适用于所有情况。当该条直线最边缘的棋子处在棋盘的一线时,即使只有七子连成直线也是先手活。

圖一中的黑棋只有七子,最後還原成直三,沒辦法後手活。注意,黑下A位沒有用,白可下1位撲、破眼。

圖一,七死八活(黑棋部分)。

圖二,黑棋改變下法,最後還是還原成直三,沒辦法後手活。

圖二,七死八活(黑棋部分)。黑棋的另一個下法。

圖三,黑棋先手活,最後成為直四

圖三,七死八活(黑棋部分)。黑棋先手活。
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七死八活
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