364473 enclosure 3-3 invasion

    Keywords: Tactics
Can Black kill?  

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

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.


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


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

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.

364473 enclosure 3-3 invasion last edited by on January 26, 2015 - 00:18
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