Kanazawa Solution 11
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Difficulty: Beginner
Keywords: Life & Death, Tesuji, Tactics, Problem
Authors:
Main line: Hashimoto Utaro 9p
Variations: BillSpight, DieterVerhofstadt 1k
![[Diagram]](../../diagrams/17/5eabe587859f819dd64f7a9face5d034.png) | Black to live |
The 1-2 point prevails over the 2-2 point again.
![[Diagram]](../../diagrams/29/64ef09517fb2b5150cb97a75e9125b51.png) | Black to live |
There is no way White can attack Black. The distance between and is wide enough for him to make a second eye (the circled point).
![[Diagram]](../../diagrams/23/9a41e09a5b9099dc6eedce30b8094c52.png) | Wrong |
If Black carelessly plays at the 2-2 point, White takes the vital point with and sets up an approach ko. Black can't block at a because of shortage of liberties. So he has to fight the ko at . After White recaptures the ko ...
![[Diagram]](../../diagrams/46/d87c79e25483de74b4c6317354cb62b0.png) | Wrong (cont.) |
... she connects at , putting the four black stones in atari. Black takes the ko with putting three white stones in atari; White connects at , and Black makes an eye with . Now White takes the ko.
So, White has to play an extra move, and if Black loses the corner, he will have played twice elsewhere in return.
Anyway, living unconditionally is much better for Black.
![[Diagram]](../../diagrams/27/fa3c012a755c26a4127b8918535feea2.png) | Wrong (ii) |
Enlarging the eyespace with is dubious. After , Black has to defend his cutting point with . Further enlarging the eyespace with forces and now White can either play atari at a in the future, or if Black plays there, almost fill Black with a farmer's hat by playing at b.
![[Diagram]](../../diagrams/34/360334e45ce199b35544d655901014eb.png) | Wrong (ii) (cont) |
Fancy play at doesn't help much. After on the 2-1 point, White can answer with , preventing any escape. Black has only one eye. Now and are miai points.
![[Diagram]](../../diagrams/20/8f609a7edd2182a96f1fe7f0e27a0ae9.png) | Wrong (ii) (cont) |
Black does better to try to run with , eliciting . Now sets up a ko.
![[Diagram]](../../diagrams/19/e3d85e96268b6ae3629b5730efc2c338.png) | Wrong (iii) |
leads to a throw-in ko.
![[Diagram]](../../diagrams/5/80392a9609826c3d0a1ae000b7ec53b5.png) | Black lives |
: Doesn't Black live now, too?
BillSpight: It loses almost 3 points by comparison to the correct play. White has the following sente sequences.
![[Diagram]](../../diagrams/0/083bb75ec7f08fee38f66242903309c7.png) | White sente |
- is a two-point sente play. - is 1 2/3 points in sente.
If Black omits , White kills:
![[Diagram]](../../diagrams/3/a023be38ad87fd8e050252c9e068ec72.png) | White kills |
Problem 12
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This is a copy of the living page
"Kanazawa Solution 11" at
Sensei's Library.
2003 the Authors, published under the OpenContent License V1.0.
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