Source:
Problem diagram.
Black plays.
Go World #3, Sep-Oct 1977, p. 54
Solution follows
(or click here to download SGF)
Correct.
The slow looking hane at 1 is the key point on the board!
If White defends one of the lower groups with 2,
Black has the right to make a couple forcing moves
at 3 and 5. With 7, Black guards his cutting points to become
very thick. In addition, Black's position looms over White's
3 upper right stones.
White naturally caps the lower side with 8.
But Black has defensive resources starting with the peep at 9.
Through 13, White's attack has run out of steam.
If White goes 1st.
If Black neglects the hane from the diagram above,
White double hanes with 1 and 3.
When White follows up with the peep at 5, Black will have
difficulty answering. Black's supposedly thick wall could
easily become the object of an attack.
An overplay.
Black can aggressively attack with 1.
But White's peep at 2 threatens to cut.
Black can steal White's base with 3,
but White's diagonal contact play at 4 means that sooner or
later Black must add another stone in the lower right.
Meanwhile, White can aim for the cut at A.
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