[Retros] FEN fun

Joost de Heer joost at sanguis.xs4all.nl
Tue Jul 30 08:20:49 EDT 2013

On Tue, July 30, 2013 10:47, Eric Angelini wrote:


> 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

Hello Eric,

I can't really see a trick, so either I'm missing something or there is a
different solution which does use a trick:

1. h4 h5 2. Rh2 Rh7 3. Sh3 Sh6


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