Sub-page of KyuExercise53

Black is unconditionally alive. No ko or seki can be forced.

Minimum eyespace  

The marked region is the minimum eyespace after reduction.

Independent miai plays  

There are five independent miai: The three pairs a&b to e&f each are miai for closing off. g and h are miai for connection. The square are miai for two eyes.

White play at i with having a white stone at d makes the square non-miai, but this can be answered by playing one of the square. Because of this i and h are not generally miai.

None of the possible resulting Black groups is in atari. And none can be raced.

So Black cannot be killed, no ko and no seki are forcible against Black.

What remains is the question of best play(s). The miai plays are not necessarily the best ones.

KyuExercise53/Solution last edited by togo on December 1, 2012 - 17:14
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