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Referenced by
UnusualEnclosures

 

4435 enclosure
   

[Diagram]
Diag.: 4435 enclosure

The assumption is that this is made from the initial 4-4 point.


[Diagram]
Diag.: reduction sequence


This is a standard way to reduce a framework based on 4435. The 3/4 exchange may sometimes be omitted.


[Diagram]
Diag.: early endgame sequence


The 3-3 invasion in this position cannot live, but may be useful in other ways. Sometimes it can function as a probe. Here it gives White a big endgame play at 3. Black needs another move at a to secure the corner, so this should be played in the early endgame, when it ought to be sente.

[Diagram]
Diag.: life

If Black reacts on the other side to the marked play, White gains life in the corner.



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