[Retros] recent improvements

[Joost de Heer]

>     1 Pe7xd8=N


I find this hard to believe. Francois Labelle (using my computer) did an 
exhaustive search for all 11-ply games to see if there were any games 
determined by the last move, and the only one found was Peter Roessler's 
6. g7xf8=N#

Joost