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2007-07-09
Problem diagram.
White plays in the upper right.
Source:
American Go Journal , Vol. 17, No. 3, Sept 1982, pp. 25-26
Keshi and Uchikomi
Kaoru Iwamoto 9p
Solution follows
(or click here to download SGF)
Correct.
The reducing move at 1 is similar to last week's problem,
although some important tactical differences do exist.
White 3 is the most effective. Don't worry about all the
tactical details, just play through the variations here for
a feel for the general concepts.
With 9, White reduces Black's sphere influence, while solidifying
his overall position. White also has easy access to the center.
This sequence is one possible fair exchange between both players.
Riskier.
The main problem through White 7 is that Black can reduce
White's access to the center. Although with 13, White does
not have to worry about creating 2 eyes, unnecessarily submitting
to being cut off from the center is not good.
Inferior.
White's stylish move at 1 makes life in the corner or on the side,
but the resulting overall position is bad for White. If Black blocks
with 2, White has to live in gote, and Black's outside influence is
too good.
Black variation.
Black also can choose to block on the other side with 2.
Through 17, White has made some good tactical moves to make life as well
as some territory. But White has lost the war, because Black's outside
influence is tremendous.
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