4-4 6-3 enclosure

    Keywords: Opening, Ko
[Diagram]
4-4 6-3 enclosure  

This enclosure, a small knight's move enclosure from a 4-4 point, is in frequent use in contemporary go. It emphasizes territory more than the large knight's move 4-4 7-3 enclosure does.

[Diagram]
3-3 invasion becomes ko  

The prime reason for saying that is the fate of the 3-3 invasion W1.

The 3-3 invasion here becomes ko in this main variation; though that's not the whole story.

See 4-4 6-3 enclosure, 3-3 invasion for more information.


There are a number of other standard invasion techniques:

Also commonly used is the shoulder hit reduction:

[Diagram]
Reduce with the shoulder hit  

Black's answer's at a and b both leave a little to be desired, so W1 may (if well-timed) successfully prevent Black building a framework on a large scale here. Naturally, if Black intends to build in the centre, it would be more consistent to make the initial enclosure with a fourth line play, such as the 4-4 6-4 enclosure and the 4-4 7-4 enclosure).


White may also simply play the ordinary approach move, setting up a tenuki joseki position. There are a number of ways for Black to play, depending of course on the whole framework.

[Diagram]
Diagonal attachment  

This diagonal attachment B2 has its own discussion at 4-4 point low approach low extension, tenuki.

[Diagram]
Pincer  

After B2 played as a pincer the exchange White a - Black b doesn't give White a proper base, so White is somewhat heavy here (position discussed at 4-4 point low approach low extension, slide, pincer, tenuki). Therefore White normally plays at one of the circled points.

[Diagram]
Footsweep  

In other circumstances the footsweep B2 is designed to attack White's base on the outside while taking the corner.

[Diagram]
Closing the corner  

Black may simply opt to take the corner with B2 here. Later, and Endgame Tesuji 4 may be relevant followups.

[Diagram]
Other options  

If the direction of play is to favour the upper side, Black may also play at a or b.




[Diagram]
Skirt approach  

Bill: Don't forget the ever popular susogakari. :-)


4-4 6-3 enclosure last edited by 69.68.182.121 on May 11, 2012 - 17:24
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