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RTGProblem12

 

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 an two step ko. With the correct move, Black dies.


[Diagram]
Mistake

W4 is a careless move, which gives B5 a chance to live by an two step 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.



This is a copy of the living page "RTG Problem 12 / Solution" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.