Nice, these look really well done! I was waiting to see something like this show up. Too bad bungie didn't release their april fools joke as a real game type... I'll dl and check it out further.
(Thanks for the good feedback) Yeah, I wish they released a Chess Game mode. I WAS thinking if I would be able to create a game mode for Chess but, I thought.... WOW that would be complicated...
Oh yeah, I saw one of these back in Halo 3's days. The guy used vehicles and blocks in Sandbox to make a whole set and chess board, but you could only play it in Forge, and only for the first round. In terms of making a game, the only thing I could think of is having a person be the king, so when they call checkmate that king's killed, and Round/game over. However, this would again have to be in Forge so you could move the pieces.