6 Mar
2011
6 Mar
'11
11:13 a.m.
Richard Guy wrote:
Recently Noam Elkies showed me the following cute chess problem. I don't know if it is original with him.
I will note that it is one of 41 ply-9 uniquely realizable (A102784) "at home" positions determined by Francois Labelle & computer, January 24, 2004: http://wismuth.com/chess/diagrams/at-home09-sol1.txt