Beginner Exercise 266 / Solution

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[Diagram]

Solution

After B1, black is alive with 8 points of territory. (It looks like 10 points right now, but later, as the outside liberties are filled in, black will need to capture the two white+circle stones.) White can't kill: if white at a then black plays b.

[Diagram]

Less good: B5 at white+circle

Black needs to play B5 at white+circle to make sure of the second eye. This way, black only has 5 points of territory.

[Diagram]

Failure

If black plays B1, then white can kill the corner. Black only has false eyes at W2 and at white+circle.


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