RTG Problem 12 / Solution

Sub-page of RTGProblem12

Solution

[Diagram]
Black is dead  

The status of the Black group is that the group is already dead.



Main line

[Diagram]
Main line  

The main line is the descent at B1, which looks like it can live with a straight four. But with the correct sequence from W2 to W6, Black is caught with a shortage of liberties, and is unable to play at a.

[Diagram]
Variation  

If B3, then W4 occupies the vital point. Later, if Black plays at a, then White can play elsewhere.

[Diagram]
Variation  

If B3 here, then W4 plays at the same point.



Other lines

[Diagram]
Variation  

B1 tries to make a ko, but the placement at W2 followed by the descent at W4 is a standard tesuji.

[Diagram]
Variation  

The hane at B3 is interesting. If W4 is played wrongly, it can lead to a favorable approach ko. With the correct move, Black dies.

[Diagram]
Mistake  

W4 is a careless move, which gives B5 a chance to live by an approach ko.

[Diagram]
Variation  

B1 makes an eye in the corner, but W2 destroys the eye on the edge.

[Diagram]
Variation  

Playing at the 1-2 point does not work here, W2 makes B3 and W4 miai for the kill.


RTG Problem 12 / Solution last edited by BillSpight on January 5, 2005 - 17:02
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