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BeginnerExercise29

 

Beginner Exercise 29 Solution
  Difficulty: Beginner   Keywords: Problem

[Diagram]
Solution

W2 at B3 or W6 is shortage of liberties, and at B5 (or elsewhere taking a black liberty) by the same B3 (connect-and-die).

W6 captures two stones, leaving equal number of liberties with Black to move...


[Diagram]
Solution

And B7 wins the capturing race by one move. B7 is a must.



[Diagram]
Alternative

Black can be even more direct - after B3 the WC stones are in a snapback.


[Diagram]
No snapback but White still loses

Or if White defends the snapback, B3 puts the white group into atari.



[Diagram]
Failure.

The atari at B1 is wrong...


[Diagram]
Failure, continued

...when White plays the hane at W1, Black is stuck. If Black pushes at a, he is in self-atari.


[Diagram]
Black to live.

The above solution(s) are incorrect. The vital point is B1. Once B1 is played, White must play at W2 to survive. Black then plays at B3. White captures B1 with W4 to prevent Black from capturing it's group. At this point Black must play at B5. B3 is not in atari so there is no need to solidify with 'a', for if Black did play at 'a', White would respond with 'b'. If Black plays at B5, White will be captured and Black can live.

The statement above is wrong. After B5 white has an eye and black does not. White can even play tenuki. If now black plays a white plays b and vice versa. This situation is called me-ari-me-nashi. Hans


Karl Knechtel, lavalyn, Scartol




This is a copy of the living page "Beginner Exercise 29 Solution" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.