44-73 enclosure, 3-4 attachment

    Keywords: Joseki

Chtito: I have a question about an approaching sequence that I don't understand: [200]

Corner Sequence  

After B5, the sequence White a, Black b is played. Now my question is: why White does not play b instead of a? How would Black punish a white play at b?

Usual shape  

tderz: This B5 is better shape and played more frequent.

Then c, not b (too wide) would be played.
White replies at a (honte), not e (if s.o could link the apprpriate diagrams to here, they must be already on Senseis).

fractic: I've also got a question about this. What happens if black plays B5 as above and white doesn't play honte at a? A black cut leads nowhere and a peep leads to something like

White doesn't play honte  

fractic: with black 11 at a. But now white can push trough at b so I don't think it's that good for black.


your question - how to punish?

tderz: On the right (with the usual extension B1), White would simply punish by pressing black down while building influence herself.
Your question (the left side) is more difficult to answer.
If White proceeds as on the right, then Black gained a bit (in comparision to the right dia) because the extension is one wider.


your question - how to punish?

tderz: W2-B5 is confusing, it depends a lot on the neighbouring stones. The exchange B2-W4 itself is bad for Black (cf. pushing on the 4th line?).
If there is one white stone below B1, then
White could descend with a, threaten connections b and c as miai.

Hence, I think the invasion W2 is feasible, because Black has to commit the unfavourable puush on the 4th line.

your question - how to punish?  

Bill: W2 is simple and effective. After B3, because of white+circle, black+circle are obviously very inefficient.

Can White play this?  

Charles Well, if B1 and W2 it becomes very dangerous for White. After B5 can White cut at the marked point? I don't believe so. In any case White was strong here first, so that White shouldn't have to fight in such a desperate way: it should be Black's problem to find good moves, and here it is White's.

W2 at B3 is quite bad, while W2 at W4 is possible but not really interesting.

tderz: White protects at b after B5, Black connects at circle, then White cuts at c and is much better off. Due to the presence of white+circle, blacks 3 stones have to fight in an unfavourable environment and will dammage B1-B3-B5 (which were bad style).
It is true that black d is sente against the corner, but that won't help so much.
B3 could have been played around m (connecting own stones - ladder works to the left - and threatening all the rest).

44-73 enclosure, 3-4 attachment last edited by Dieter on July 5, 2008 - 14:28
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