Beginner Exercise 112 / Solution

Sub-page of BeginnerExercise112

Solution

[Diagram]

White wins

W1 increases the liberties to three for the white group. W3 is a must-know technique in capturing races - Black needs an additional approach move at B4 before being able to play at a.

[Diagram]

Variation: white falls for a trick

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

[Diagram]

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.)


Failures

[Diagram]

Seki

W3 is a mistake - a seki isn't a good result, when White can kill instead.

[Diagram]

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.



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