RTG Problem 89 / Solution

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Solution

The key move is this W5. It is wrong for W5 to throw-in at a.

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Variation 1

The three Black stones cannot connect.

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Variation 2

Again, Black cannot connect after B9. Due to the presence of the white+circle stone, Black will be captured in a ladder if Black insists on connecting.

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Variation 3

The huge Black group is captured.

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Failure (B8 at W5)

Throwing in first actually allows the Black group to go home, due to the existence of the B6 stone.


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