RTG Problem 35 / Solution

Sub-page of RTGProblem35
[Diagram]

Solution

The best Black can get is to connect back the two Black stones in sente, leaving the endgame benefit of capturing two White stones at a.

Note that in this diagram, both W2 and B3 are tesuji.

[Diagram]

Caution

Note that W6 cannot hope to save the two White stones. B7 is a good move, and White is killed.

[Diagram]

Tesuji

W4 cannot Block, because B5 can cut. After that, B7 makes a snapback. Now White cannot live. (W6 at a, B7, Wb still lives, of course)

[Diagram]

Not tesuji

W2 and B3 are tesujis, because B3 cannot cut directly. W4 captures all the Black stones.

[Diagram]

Dangerous

W2 is dangerous. B3 and B5 eke out a ko, and the life and death of the entire White group now depends on this huge ko.

[Diagram]

Dangerous

Similarly, W2 here is also very dangerous. After B3, White can only live by a ko.

[Diagram]

Failure

B1 forces W2, and looks like B3 is a tesuji that kills?

[Diagram]

Failure

If W4, then B5 crawls and connects out.

[Diagram]

Failure

But W4 can simply descend. With B5, Black happily sees the stones coming home. And then W6 squeezes. White has in fact prevented the guest (three Black stones) from leaving!


This is a copy of the living page "RTG Problem 35 / Solution" at Sensei's Library.
(OC) 2009 the Authors, published under the OpenContent License V1.0.
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