British Go Journal No. 62.  July 1984. Page 31a.
The problem was on page 7b .
Diagram 1 |
Black 1 is a sharp move that forces White to grovel. If he tries cutting Black off at 2, Black 3 kills his corner. The best White can do is to block to the right of 1, Black plays one point below 3, White blocks, Black plays at 2, and White is forced to connect his corner out in gote.