BQM 21 / Lower Right

Sub-page of BQM21
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.

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.

Black lives in seki  

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

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.

Black dies (continuation)  
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.

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.

Can't White play like this?  

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

Black dies?  

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 on January 26, 2015 - 06:58
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