BQM 402

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    Keywords: Joseki, Question
[Diagram]

Is this reasonable?

In the game Black was able to attack the marked white stones and took a huge corner. I feel several moves are not so good here. Especially W5 one line nearer to the corner would have been better. All ladders toward the lower right corner are favorable for Black.

[Diagram]

Joseki

Herman Hiddema: It looks as though this situation came to be through this 5-4 joseki: 4-5 Point 4-3 Approach Keima Contact At 6-3, followed by a cross-cut. If it did not, it is a reversal and the same things apply.

So in this situation, extanding at a is a mistake.

After W3, the ladder toward the lower right is very important. If the ladder is bad for white, W3 was probably better at B4, not allowing black to cut.


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