[Retros] non-FEN fun

[Joost de Heer]

On Mon, August 19, 2013 19:10, Noam Elkies wrote:

> As it happens Chessbase.com just ran this article

>

> http://www.chessbase.com/Home/TabId/211/PostId/4010825/the-infamous-1999-chessbase-christmas-puzzle-160813.aspx

>

> on its first "Christmas puzzle" ever, which asked in 1999 for

> a legal came starting 1 e4 and ending 5...NxR#.


Quick question: Does 'White played 2. Qe2, and the game ends with
5...NxR#' result in a unique proofgame? Solution may be a little bit more
easy than the original one however.

Joost