Speaking of bizarre chess additions:
I've actually played this.
http://www.sjgames.com/knightmare/
Chess plus "magic"-style cards to modify stuff. Ie turn a pawn into a bomb...
Highly annoying. One must completely rethink strategy, because one only gets so many powerful cards, so one can't use them right off. I got stomped by a friend of mine who I can easily crush 10 games out of 10 at regular chess.
Also drags game on forever -- you checkmate your opponent, they wriggle out of it with some card, material keeps getting put back on the board, etc. etc.
Chess is something of a positive feedback system, in the sense that the further ahead in material one player gets, generally the easier it is for that player to win additional material. Like all positive feedback systems, chess has the saturation-point limit (if that's the right term) which comes when the other player runs out of material.
I haven't looked at all the variations in the links closely enough to see if any of them would behave more like a negative feedback system, where the further ahead a player gets, the harder it is to increase his lead. In a link provided in another thread, there was mention of a variant where a pawn could not be promoted to anything if a player still had all his pawns, and could only be promoted to a low-quality piece if a player still had most of his pawns. This may sort of implement the negative feedback idea.
Originally posted by Paul DiracI imagine it went something like this:
"No unit, if guarded, may be taken or exchanged," says jbaca's link.
Doggone it, I still think the rules of standard chess ought to allow you to castle out of check, but they don't. I would love to know the reasoning of that rule.
"Well, obviously the king shouldn't be able to castle INTO check."
"Indeed."
"And thus it makes sense that the king shouldn't be able to castle THROUGH check, as well."
"Indeed."
"So why don't we just make things real simple for everyone, and say that the king can't castle if it's IN check, either?"
"I think you're onto something here."
Hey, it gives you an extra reason not to dilly-dally with your king in the center. And it gives you a reason to try to check your opponenet's uncastled king in a way that can't be blocked.