[Retros] FEN fun

[Eric Angelini]

Hello Retro-fans,
here is a 5-minute puzzle for the August break.

It is possible to reach, after Black's third move,
many positions having a FEN format where all numbers are prime.
Find a game where the last move was _not_ a pawn move.
(The solution is far from being unique -- but the "trick" yes,
I hope.)

http://en.wikipedia.org/wiki/Forsyth%E2%80%93Edwards_Notation

Best,
É.
(BTW, does this open a new kind of chess problems -- I mean,
playing with the FEN notation -- or is it, as I imagine, old hat?)


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