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Kanazawa Solution 12
Path: KanazawaSolutions · Prev: KanazawaSolution11 · Next: KanazawaSolution13
There is abolutely no time to expand the eyespace. White has to play at the vital point right now. And the vital point of this shape is 1.
2 and 3 are miai and after the 2-3 exchange, A and B are miai.
The reason why 1 is the vital point, lies in the fact that White can answer the atari of Black 2 with White 3. Without 1 in place, Black would capture three stones
As said before, expanding the eyespace is not right. Black ataris at 2 and after White 5, Black can start a ko with 6 at 2. Live in ko is not sufficient.
This shape does not call for the 1-2 point. A and B are miai to keep White on one eye, and Black falsens the other eye by playing 2. Playing 2 at B also works. Black should not play the atari as in the previous diagram, because he permits ko. In fact, White 1 destroys more eyeshape than it makes and she dies unconditionally.
1 here is basically the same mistake as the first one.
Finally, the other 1-2 point leads to the same ko result once again.
It seems to me that in this last diagram, black can kill unconditionally, without a ko. After black 4, white cannot make a second eye due to damezumari. This also goes for the third wrong solution (wrong iii), where after W at b, black exchanges a for 1 to get the same situation.
Problem 13 Path: KanazawaSolutions · Prev: KanazawaSolution11 · Next: KanazawaSolution13 This is a copy of the living page "Kanazawa Solution 12" at Sensei's Library. (C) the Authors, published under the OpenContent License V1.0. |