Beginner Exercise 193 / Solution
![[Diagram]](../../diagrams/5/5e666d22e14a6f19d57c924a7aea5322.png) | Analysis |
Before presenting the solution proper, it is worth nothing that aims at in this diagram. This is going to spell trouble for Black, the result is at least a favourable ko for White. So Black at a definitely is not going to be a solution.
![[Diagram]](../../diagrams/20/4249a0c7067ba53f81c015440fdf4a3e.png) | Failure |
However, playing directly at is also wrong. While it is not possible for White to approach at a, White can play at . If blocks, White can start a ko with .
![[Diagram]](../../diagrams/52/da5fd69c04374a3ae975574a4ba29d0b.png) | Failure |
If makes an eye here, then White has successfully made a seki in sente within Black's territory.
Bill: When White can win the ko, Black will avoid it with .
![[Diagram]](../../diagrams/20/83c40ba665e5e14552e9fbc7ac503c05.png) | Failure |
Actually, if White wants to avoid a ko at all costs, it is still possible to create a seki with and . But this seki is gote for White, and also White loses points due to sacrifice of and .
Bill: Late in the game (where this position is likely to arise), this is the way for White to play if Black can win the ko.
![[Diagram]](../../diagrams/11/b5e33be0ba3948b819082733bc1a1e62.png) | Failure |
If , then White has the option of playing for a peaceful seki or to start a ko at a. Or can just play elsewhere.
![[Diagram]](../../diagrams/20/276d0dbb86f757eeabc6cfd6492248ba.png) | Solution |
By now, it should be clear that is the only solution. See that White a means self-atari.
![[Diagram]](../../diagrams/17/da981d1b57df58e930805eb5c0936bda.png) | Solution |
If , then can play elsewhere.
![[Diagram]](../../diagrams/25/ed50c632902e0413a92bec3ba59bc785.png) | Solution |
tries to bluff Black into thinking there is a ko. shows that with a connect-and-die, there isn't any ko.
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"Beginner Exercise 193 / Solution" at
Sensei's Library.
2004 the Authors, published under the OpenContent License V1.0.
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