364473 enclosure 3-3 invasion

    Keywords: Tactics
[Diagram]

Can Black kill?

The black formation is the 3-6,4-4,7-3 enclosure.



[Diagram]

Ko is normal

Here this ko can be considered a normal result. If Black wants to prevent this, and kill White, it typically involves playing in a more aggressive way, relying on local strength.

[Diagram]

Life

[Diagram]

Seki

This is perhaps Black's strongest attempt to prevent White from living. However, White forms a seki with no problems.

[Diagram]

Agressive

B1 can kill, depending on what happens on the outside with the cut at W10.

[Diagram]

Can Black kill?

Almost any Black move threatens the life of white+circle. B1 is a skillful attempt. White goes for ko again. If B3 elsewhere, then White will play a.



In conclusion, White should not be in a rush to invade here, since much depends on the outside support. If Black adds another move, it is difficult to do so without a sense of being overconcentrated.


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(OC) 2014 the Authors, published under the OpenContent License V1.0.
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