BQM 21 / Lower Right

Sub-page of BQM21
[Diagram]
Black plays first  

DaveSigaty: B1 is not the only entry point in this formation but it is one of the basic starting points. What happens next? Should Black start elsewhere instead?

See 364473Enclosure33Invasion for a summary of the below discussion.


[Diagram]
Black lives  

DaveSigaty: W2 on the wider side is perhaps natural. B3 will allow Black to live. W4 is one of a variety of counters but there is no way to prevent Black from living if he is willing to do so on a small scale in gote.

[Diagram]
Black lives in seki  

This is perhaps White's strongest attempt to prevent Black from living. However, Black forms a seki with no problems.

[Diagram]
Black dies  

BramGo: White should play from the other side in my opinion. But this may depend on the outside as well, W7 is a bit aggressive.

[Diagram]
Black dies (continuation)  
[Diagram]
Agressive counter  

BramGo: As I said, the hane is a bit agressive though. Black can cut and fight when he is strong on the lower side.

[Diagram]
Black ko  

This ko with B3, B5, B7 is another very common idea for invading under a small knight enclosure. It is a more aggressive approach than just seeking a small life. Black is happy either to live on a larger scale via the ko or take a suitable profit elsewhere in exchange for the corner.



In this particular case where White has played the large and small knight combination, White has a problem trying to eliminate the corner aji. Black need not be in a rush to invade because there is no efficient follow-up play for White here that will prevent an invasion. Note as well that in all the variations above the white+circle stone is not well placed.


[Diagram]
Can't White play like this?  

Pokaali 16k: How can Black make life after W2?

[Diagram]
Black dies?  



[Diagram]
Black can play better  

JanRamon: Black 1 is one possibility. If white 2, 3 reverts to the ko variation. If white does not play at 2 (or A), black can play at A.


BQM 21 / Lower Right last edited by 50.23.115.116 on January 26, 2015 - 06:58
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