IgoHatsuyoRonProblem35/Attempts

[Diagram]

Black to play

Imagist: B1 fails because after B7 the marked group has two outside liberties, enabling white to play atari from that side.

Bill: B1 does not fail. (Hint.)

[Diagram]

Black to play

Imagist: This B1 kills the marked stones in gote.

[Diagram]

Black to play

Imagist: This B1 is sente because it reduces the liberties of the white group, threatening to make black a effective. It also means that white b is no longer sente, since there is no longer a cutting point, so white's three stones on the right are dead. Killing these three stones in sente is the best local play I can find, but it seems like there should be a better way to play.


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