Beginner Exercise 112 / Solution

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White wins  

Confused: W1 increases the liberties to three for the white group; and after W3 Black needs an additional approach move at B4 before being able to play at a.

Variation: this is not a ko  

Variation: black might play B4 trying to start a ko, but white still wins the capturing race (B8 at B4, W9 at a).

Variation: Black trying to escape  

Variation: black might try to escape to the right. In that case white can stop him with the following sequence. A potential cut at a could be easily fended off by playing at b and putting the black group into atari.

Variation: white falls for a trick  

With B2, black tries to set up a ko. W3 is a mistake.

Variation: no ko  

After this W3, the variations get a little complicated, but white can kill without ko. (Black is trying to set up something like a tombstone squeeze, but it doesn't work in this context.)

Things that don't work


A seki isn't a good result, when White can kill instead.

Death for White  

If Black is allowed to play at B2, the white group dies. It doesn't matter whether White played at W1 or at a, b, c or d.

Beginner Exercise 112 / Solution last edited by on October 13, 2022 - 14:33
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