About Ko in a Semeai Between
Two One-Eyed Groups (2012)
[ Second Ko-Shape for White &
Larger Eye for Black ]
However, the matter will change fundamentally if there is a larger eye for Black. Capturing what is inside this larger eye will give Black breathing space. Again, we start the discussion with the case EX = 1. |
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: : The additional ko did not help White. Again, if all other conditions are the same, Black wins, if he has one more ko-threat than White does. t = 1. |
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///: EX = 2 |
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: : Again, the larger eye for Black compensates for the effect of the additional outside ko for White. |
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, : Black cannot answer locally, so White gets to play a fourth move elsewhere, with . Combined (, , ), she has got the chance to play four moves in a row elsewhere, and none of the first three moves must contain a really "large" threat, compared to the value of the ko-fight. It will be sufficient to prepare a situation, where the fourth move is really destructive. This seems to give the same result as with EX = 0, but two -liberties less for Black's group. | |