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This problem was used on the entry form for the 2000 West Surrey Handicap Go Tournament. It is trickier than it looks.
In Dia 2, the attempt to expand the eyespace is refuted by 2 which forces Black to connect with 3 and loses shape.
In Dia 3, 2 limits the size of the corner and 4 is a vital point.
Here we have the correct Black 1, so we know that Black is going to live. Having said that, this is not the strongest White 2 and living (with 3 points) is easy for Black.
Because Black lives anyway, this may turn out to be the best White can do - it depends on the rest of the board.
White 2 here is White's strongest reply. It offers Black the opportunity of the 'instinctive' response 3 which fails as shown.
If 5' at 6, 6' at 5 leaves one eye in the corner. Also 7' at 8 gets 8' at 7.
Black does not want to carry on playing after 9 since the corner is / becomes 'bent four in the corner' (3 stones in 5 spaces).
Black has the option of pushing out on the forst line from 7 if White doesn't block there.
If Black foolishly continues, he endis with one eye only.
White 2 elsewhere, White 4 recaptures at , White 6 at 3.
Problem of the month
British Go Association
Last updated 2004-08-10
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