[Retros] Backhome proof game.

[Joost de Heer]

Nicolas.Dupont at math.univ-lille1.fr schreef:

> Hi,

> 

> Because of a welcome remark by Mario Richter, I must slightly extend a

> rule : A return primes a check and even more the potential capture of a

> King.


The standard way to formulate this is: Checks are fairy.

Joost