>On Sun, 7 May 2000 xpolakis@... wrote:
>> >This is an old problem, first solved by a Duchman math/an (name?),
>> >and by Conway (and Somebody ?).
> No, I didn't solve this problem, although I did do some work
.... which work, according to experts on this problem, was crucial, since...
>on it. It was completely solved about 5 years ago by Bjorn(?) Poonen
>and Mike Rubinstein.
> John Conway.
Today I quoted Heineken:
| This problem was given by the Dutch Mathematical Society in the 30's,
| and one solution was given by G. Bol. Unfortunately, his solution published
| in _Archief voor Wiskunde_, escaped the attention of many mathematicians,
| so many articles on this problem or its specific cases appeared;
| for example, by Conway and Goft, Heineken, and Harborth.
It is a misspelling but not of mine. The name I think is Croft.