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2008-07-21
Problem diagram.
White plays.
Source:
Blueprint 361
Miyamoto Naoki
Go World #1, May-June 1977, p. 50
Solution follows
(or click here to download SGF)
Inferior.
White 1 is certainly on a good point, but White misses a chance to take advantage of Black's weak position along the top.
With 2, Black takes care of his weakness along the top.
White can try to expand the moyo with 3, but
Black only needs to build up the left side at 4 to stay ahead in potential territory.
Black has no fear invading White's framework at 6 because Black's upper side is very strong. Black has the lead.
Also inferior.
White 1 on the left side is big, but Black's weakness at the top is even bigger.
Again, Black 2 protects the top weakness.
Black only needs to make a simple move at 4 to keep all his groups safe and maintain the lead.
Note that Black could also have played at A, because Black has forcing moves at the marked points.
Correct.
Based on the previous variations, a White play at 1 should now be obvious.
If Black holds onto the top area with 2, the next few moves are a one-way street.
Black has kept the top intact, but must spend a move at 10 to prevent White's ladder.
See the next diagram for White's follow up.
Continuation diagram.
White now has time for a beautiful squeeze at 11.
Black must spend another move at 20 to prevent the top area from collapsing. With sente, White can now invade the left side. White is the one who is leading.
This problem required some reading, but that is true for every plan or blueprint.
Email the Problem Of The Week editor at potw@usgo.org
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