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2007-04-30
Problem diagram.
White's response to Black's marked play?
Source:
American Go Journal , Vol. 17, No. 2, June 1982, pp. 19-20
The Cause of Victory; The Cause of Defeat
Ota Kiyomichi, 8p
Solution follows
(or click here to download SGF)
Fails.
The right side is the main issue in this game.
But now with simple moves, after White 1, Black can make
the most of his strength at the bottom. After White 11,
Black's moyo is deep and wide.
Inadequate.
White 1 is a common attacking technique, but comes up
short here. Black 2 is the perfect defense. With 5, White
has invaded the corner more effectively than the previous diagram,
but Black has still walled off a large moyo.
Correct.
White 1 starts by aiming at a forcing cut. White 3
slides down the side, and forces Black to make a choice.
The diagram shows one possible sequence when Black
defends the top side with 4. After 15, White gives up
a stone and has made
a nice sabaki shape inside Black's moyo.
Black variation.
If Black defends toward the middle with 4,
this diagram shows one possible sequence.
After 17, White's sabaki works again, especially
given White's ko threat below White 9.
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