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2007-12-10
Problem diagram.
Black's response to White's marked play?
Source:
Go World #38, Winter 1984-85, p. 40
Practical Tactics and Tesujis, Rin Kaiho
Solution follows
(or click here to download SGF)
Build thickness.
This kind of position often arises in handicap games, in which Rin
recommends that Black plays simply to build thickness. Black 1 is
such a move. With 4, Black again simply blocks. Through 13, White
lives, but Black builds nice thickness.
White variation.
White 4 is natural-looking, but wrong. Black 7 grabs the vital
point. Through 19, White has captured a big corner, but Black's
overwhelming outside thickness would be enough to win the game.
Black variation.
Note that Black cannot block with 3. After 10, Black suffers a
severe setback in the corner.
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