Bartok card game

[Sam]

Hey all,

I want to create a computerised version of this game, though I'm not 
really sure how to go about it. For those who don't know how the game 
works, here's my attempt at a brief description:

It is very similar to the card game Uno, though played with a standard 
deck of cards. An initial card is played off the top of the deck, and 
then each player has to play a card of the same suit, or the same face 
value in another suit. Whoever gets rid of all their cards first is the 
winner.

The tricky bit is, the winner of a round gets to make up a new rule. 
Some examples might be "when a club is played, skip the next player", or 
"when a heart is played, the next player draws 2 cards", etc. So, I am 
looking for a way to dynamically add rules to the game, without limiting 
the possibilities too harshly. I could always just give a select few 
rules to choose from, but then the game loses it's fun ;)

I've been thinking about it for a while, but no obvious path to take has 
presented itself to me. If anyone has any suggestions, they would be 
greatly appreciated.

Thanks,
Sam.