BQM 559

  Difficulty: Intermediate   Keywords: Joseki, Ko, Question

Invading the 4-4 6-3 enclosure.


What's best here? Nobi?


Dieter: It's difficult to give an answer without knowing the whole board position. The presence of stones at the circled point can influence the situation in a major way. Anyhow B4 plays on the inside, so a light approach seems called for.

Usually, Black will play B4 at W5, since White can only live in ko and the outside here is open, which makes outward influence an interesting feature. When the outside is not open, Black may play like you suggest, killing White (if the outside is rather black) or preserving the corner (if the outside is rather white).


The W5-B6 exchange before W7 is kind of kikashi. Next B8 is the only way to kill, but without more support here, Black will not be able to sustain such an all out attack. Locally, a-b-c and d@b follow.

Bill: As Dieter says, it is hard to say what is best without seeing the rest of the board. The invasion is bad on an empty board, so we expect to see White stones in the vicinity.

Black is uncoordinated  

That said, my first thought is W5, and if B6, then W7. Black now has three disconnected groups. Not so easy for Black.

BQM 559 last edited by on January 23, 2012 - 19:14
RecentChanges · StartingPoints · About
Edit page ·Search · Related · Page info · Latest diff
[Welcome to Sensei's Library!]
Search position
Page history
Latest page diff
Partner sites:
Go Teaching Ladder
Login / Prefs
Sensei's Library