4474 Enclosure

    Keywords: Opening
4474 enclosure  

Adding black+circle is normally Black's way of competing for central influence, in a large-scale game.

3-3 invasion  

In this case B4 is good if a little unexpected, when White invades the corner at the 3-3.

Alex: Interesting. I guess the idea behind B4 is that, although it looks thin, it actually leaves less aji than a hane at b. White can't try to cut with a, because Black b is sente against the corner. Meanwhile, if White attaches underneath at c, as in a similar non-enclosure san-san invasion joseki, she ends in gote, on account of black+circle being in place already. Now that I see this, it makes sense, but I've never seen it before and wouldn't have found it myself.

Davou: Seems interesting indeed, but I have the feeling that black should press for sente early in this position. Closing the shape by playing B himself completes the wall's thickness, ends almost all ko threats, and prevents white from (eventually) making this invasion larger than a normal 3-3 would be (in gote of course).

Uberdude: Of course black playing b is also a waste of a ko threat, whereas white playing a is a possibly point-losing ko threat.

4474 Enclosure last edited by on September 21, 2007 - 11:49
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