BQM80

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  Difficulty: Beginner   Keywords: Tesuji, Question

This is a problem in a book I'm reading:

[Diagram]

Black to play and capture the two white stones. The book tells me Black's best move is a, and White's best response is c, and I understand the rest of the sequence. But why is White's best move c? What happens if White plays b instead?

(note: Thanks to everyone. Misread the book. Black plays at b not a ...)

[Diagram]

unkx80: Was there a typo in the book? I think the solution should be this.

icepick: This is what is termed the Crosscut Tesuji, from TesujiTheBook. unkx80's solution is correct.

[Diagram]

Possible Continuation

unkx80: Consider playing B7 at a instead.

[Diagram]

Tricky

This is a given variation that can be tricky for Black. As Dieter pointed out, B3 is the correct follow up.

[Diagram]

Dieter's move

This is Dieter's proposed move (B3). It looks good - this way Black not only captures the two cutting stones, but also the marked stone and W2. - Andre Engels, after improvement/correction by Dieter

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Another one.

unkx80: While you are at it consider this one. Of course you would have known the correct solution already, but what if...?

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Descent

Andre Engels: Dieter's descent again resolves the problem. Charles It may do; but now White at a is a reading problem. Andre Engels: The solution seems to be that Black connects at b and wins the capturing race by one move. But this position is surely more complicated than the books usually show.

[Diagram]

Descent again

Bill: Shouldn't Black descend again with B1? Then it's me ari me nashi. The above is one variation. If W2 is at B3, B3 is at W2.


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