Angle play after diagonal attachment

    Keywords: Opening, Joseki
Ugly angle play  

The problem is with W5. I (Charles) see this often when White enters Black's sanrensei. Black can get good territory by playing at a; while in a handicap game playing at b for influence is also good.[1]

Plays for a base  

If White really wants to make a base, playing white+circle is better. The common play is c, but that can mean that White is driven out into the centre.

Another way  

Fhayashi - This is suggested in The Power of the Star Point

Charles W1 is fine, but W3 is a bit heavy: try at a (or even b) instead.

Andy: Doesn't W3 give white the opportunity to make Immediate Life with c?


From Takemiya Masaki-Jiang Zhujiu 1988-08-21. Here W1 takes into account the earlier exchange of white+circle and black+circle to the right. White lives quickly (White 11 at d) and claims that Black is a little overconcentrated to the right. In return, Black can claim greater security on the left: to invade at e and get the answer Black f is seemingly a bad idea for White, seriously weakening her side group.

Charles Matthews

[1] Why is W5 bad? Please show an example.

Double hane continuation  

In answer to white+circle, Black has a choice of playing at W2 in this diagram, or this sequence to give White bad shape.

see also

Angle play after diagonal attachment last edited by fractic on January 16, 2009 - 14:36
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