Joachim's Ko-Semeai - Putting the Cart
Before the Horse (2013 - 2015)
E4d - White's Centre Group has Three Liberties
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One challenge, however, remains for Black: Without White's co-operation, he can not reach the situation presented here. |
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If we assume the exchange of |
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On the left side of the board, there is no move available, with which White could pre-empt all Black options for further ko-threats. |
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Black has valid ko-threats in the nakade, only if White's |

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played earlier (this means, for example, that White mistakenly must have captured the ko one move too late), Black's atari in the nakade would be a valid ko-threat.

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, in the top left corner to win the game.



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), but which is still enough to win the game.



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), but Black's connected group on the lower edge still has five liberties. This means that White is unable to connect the ko.
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