4-4 6-3 enclosure

    Keywords: Opening, Ko
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.

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:

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.

Diagonal attachment  

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


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.


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

Closing the corner  

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

Other options  

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

Skirt approach  

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

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