Kill 3-3 invasion in star point small knight enclosure


Black needs to be thick on the outside in order to kill the corner cleanly.

Variation A:


This requires a favourable ladder.

Variation B:


White’s kosumi doesn’t work. Black can kill white unconditionally.

Variation C:


White can play A to start a two-step ko. If white plays B, white dies unconditionally.


Black can connect at O2 and white needs to play T2 to continue the ko fight.


This is a big pig mouth shape. White dies.


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