[Retros] rights & ocassions / not answering Andrew anymore

[Nicolas Dupont]

>> By the way, is it possible to construct a sound PG with a repetition of
>> the diagram position? Of course, if any, it cannot be a SPG.

> Impossible, I think. If the repetition is in an even number of moves
> (2M), you can just add M times Sa3 Sa6 Sb1 Sb8 at the beginning. And
> any moves that will free another piece than a knight will allow an odd
> number of moves resulting in a switchback.

Maybe feasible using an appropriate fairy condition?

Best,

Nicolas.