364473 enclosure 3-3 invasion

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.

Seki  

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

Aggressive  

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

Can Black kill?  

Almost any Black move threatens the life of . is a skillful attempt. White goes for ko again. If 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.