[Retros] Solidarity Chess (=SC)

[Nicolas Dupont]

> I understand more clearly now why it

> is important to have a "check" concept

> in some fairy variants: because it is more

> fun!


A fairy condition is defined only if the legal moves (under this  
condition) are. And to define the legal moves, it is necessary to know  
which are the checking moves. Indeed the set of legal moves following  
a checking move X+ is not the same (in general) as the set of legal  
moves following a non-checking move X.