3-4,6-3Enclosure/Query

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[Diagram]

Deprecated?

According to Enclosure Josekis, B8 (rather than a - see hanging connection to the second line as good shape) is bad shape.

Which it may well be; but there are a number of examples of this in recent pro games, when Black already has a stone at b or even c.

[Diagram]

A standard ko

For example with black+circle present, White may end up with this shape, an incomplete comb formation in the corner; which becomes ko after Black a. Much will depend on White's scope for causing trouble on the outside. Black at b becomes very thick.

See for example games Kato Masao-Kobayashi Koichi 1997-02-01 and Kudo Norio-Kobayashi Koichi 1998-12-10.

Charles Matthews


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