BQM566

  Difficulty: Intermediate   Keywords: Opening, Joseki, Question

I ran into this on the first pages when I started reading Basic Techniques of Go. It kept me awake last night.

[Diagram]
Joseki from the book (dia. 1)  

This joseki is available at SL as 3-4, 5-3 enclosure, capping reduction

[Diagram]
My variation (dia. 2)  

I played variations on a goban, and this is what kept me awake late


Only reasonable continuation for white I could find was at a.

Any thoughts?

Pekka23


unkx80: My answers here:

[Diagram]
Black split (dia. 3)  

I think Black has no good answer after W1, W3, W5. If B6 saves the two stones, then W7 makes Black a split shape.

[Diagram]
Black corner gone (dia. 4)  

If B6 cuts, then Black's corner is gone after W7. (Black can continue at a, but this would be a two-stage ko that favours White and heavy for Black.)


Sorry, been busy..

[Diagram]
Black makes both extensions work? (dia. 5)  

Although the black shape is split, I don't feel it's bad. As far as I can read, white gets only a couple of kikashi to make black lose the corner, but white gets only one eye. The only option for white after this is to run into the center from a tight position. Is stealing the corner worth it, even if white does live?
As for diagram 4, I really don't like the way it looks for black.

And as for diagram 2, I really don't for the continuation, but it feels like my kind of move. :)

Pekka23

Slarty: The above is locally a success for white/bad for black, for being split. That kind of result is still dangerous for white though, it's true. Splitting directly with W1 below is much easier, imo.

[Diagram]
White unleashes her original threat  


symplicity: When evaluating the result, also remember that black started with 4 stones here. What would you expect if you took an typical even corner exchange and then gave black four moves in a row? Often it would be worse for white than dia 5.


BQM566 last edited by tapir on April 22, 2014 - 16:05
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