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2007-04-16
Problem diagram.
Black's response to White's marked play?
Source:
Go World #37, Autumn 1984, p. 61
The Great Joseki Debate, by Honda Kunihisa
Solution follows
(or click here to download SGF)
Correct.
Black 1 works perfectly
with the other Black stones
at the top to form a huge moyo.
Through 5, Black continues to expand
his moyo, and with White's side moyo
open in the lower right corner, White
is at a severe disadvantage.
Black has a large lead.
Wrong direction.
Taking territory in the top right corner
with Black 1 is relatively small.
Through 8, not only has White made a safe
group inside Black's moyo, but also White makes
miai of A (further reducing Black's potential
at the top), and B (threatening to squash
Black's right side invasion).
Wrong direction.
Black 1 cedes the upper right corner to White
in return for attacking White's right side. White
connects all the upper side stones with 2, so
Black must cotinue the attack with 3 and 5.
After 6 though, White's side group is also safe.
And White 12 greatly reduces the territory that
black might have made at the top.
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