Beginner Exercise 257 / Solution

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Black lives  

Black lives again  

togo: This W2 loses White two stones and one ko-threat compared to W2 on B3.

xela: This might look like a ko, but actually there is no way for white to put black into atari, so black is unconditionally alive in this diagram, and the two white stones will be removed as prisoners at the end of the game. Black shouldn't play any more moves in this position. I think "loses two stones" means "loses two points": in the first diagram on this page, black has 5 points of territory (counting the two white prisoners), whereas this diagram gives black 7 points.

... and again  

togo: This W2 gets one ko-threat less for White than W2 on B3.


This is a ten-thousand year ko.

Beginner Exercise 257 / Solution last edited by xela on November 9, 2022 - 00:26
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