I'm not sure this is a good idea.

have a look at http://www.chessvariants.com/ . there are literally THOUSANDS of variants listed. what should Filip do, program them all?

a lot of variants are fairly easy to program, for example those with just different initial positions with figures that already exist in the software. but what's the point? surely, there comes a moment where more means less. to program a variant, even if it's easy to do, where only a couple of games will be played is pointless.