Joachim's Ko-Semeai - Putting the Cart
Before the Horse (2013 - 2015)
2a - Hanezeki Exchange
( 978) (Referenced by 232; 251; 329; 1019) White did not play at , but at , and Black inserted the Hanezeki Exchange of / . The Punishment Semeai Liberty Level has been reduced by one, and is seven now. Black's group has six liberties (3 * c, 2 * b, k), one less than before, so nothing has changed here (with respect to the relationship of the Main Semeai). Therefore, Black must not connect the hanezeki's tail here, because White's centre group still has five liberties (2 * w, 3 * c); Black will have to re-capture the ko, and so White will win the semeai with Black's connected group on the lower edge. |
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