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2006-11-20
Problem diagram.
Black plays.
Source:
Go World #37, Autumn 1984, p. 7
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Nihon Ki-in
Solution follows
(or click here to download SGF)
Best.
Black 1 aims to overconcentrate White along
the top where White already has overwhelming
influence, while also creating Black forcing
moves on the outside to build the Black moyo
on the right side.
Black 3 gives up two stones, for a big forcing
move at 5.
With 11, Black has time to make a second
moyo-building move.
Black has a superb position.
Wrong timing.
If Black plays at the bottom with 1 first,
White reinforces and solidifies with 2, but
more importantly, exposes a weak point in
Black's position at A. Black would hate
to have to go back to defend at A.
By comparison, the correct line above sacrificed
two Black stones to eliminate this weakness.
Too solid.
Black 1 lets White push up with 2 to help build
White's moyo, and leave the lone White
stone on the right side as "light".
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