Khet always seemed like a cheap gimmick to me...hm.
But, concerning chess and chess-like but better games...I have a hard time thinking of a more boring game than chess...I really hate chess (but I like Shogi, etc.) Chess and Monopoly are THE games to get me angry instantly, I hate those :D
I think, if I want to play something kinda like chess, I´ll just play summoner wars