Problem diagram.
White plays.

Source:
American Go Journal, Vol. 16, No. 4, Dec. 1981, pp. 27-29
Keshi and Uchikomi
Kaoru Iwamoto 9 dan

Solution follows    (or click here to download SGF)

Good.
White 1 and 3 are a good, but not the only, way to approach Black's strong formation. The following diagrams show some possible lines of play.

Note that reversing the White move order is asking for trouble. If White's first plays at 3, Black will respond at A. Then if White's second move is at 1, Black could take more drastic action by playing at B.

Black continuation.
Black 4 is the most accepted response. White presses with 5 and 7. White 9 makes shape.
Not only has Black's sphere of influence diminished, but also if Black plays elsewhere with 10, White can play a ko up to 17 in the corner at an opportune time.

Alternate Black continuation.
Black can also respond with 4. Starting with 5, White can seize a position along the top.

Another Black continuation.
Black 4 is another possible Black response. White can press with 5. Then with 9, White secures the retreat of his center stones, erases some of Black's potential, and leaves behind the threat of the ko as seen in the second diagram above.