Don't understand how you aren't seeing the complexity Cyborg.
From everything he's explained already it seems like it will be very complex to master, especially with all of the random elements thrown into the mix, or with added players.
If I understand Chris correctly it's a "Easy to learn, Hard to master" type of game. Don't mistake ease of access with simplicity, Chess is easy to learn.
You'd be surprised how many never learn en passant.
Heh, actually, no, I wouldn't. I used to do Customer Service for a large chess website, and we'd get complaints about there being a bug in the system or players cheating on a nearly daily basis because the didn't know that particular rule.
That said, that's one rule that only ever comes up occasionally, and isn't usually a factor until you reach mid-level chess skill. Making, I think, the point even more that chess is very playable with only a rudimentary understanding of the rules and strategies. The difficult part of chess comes with the higher levels of play.