"It's a PC based, deathmatch arena combat game, combined with Chess," explain the developers of Rooks Keep. "Okay then, that sounds weird!" says I. "We also have a demo, and we're running the gauntlet of Steam Greenlight," the developers continue, cheerily. "Ah, a demo, like in the old days," say RPS readers, who quietly click to download it and play. "Additionally, Rooks Keep supports 3rd party Chess engines," says the website. "I don't even know what that means!" says Jim, before making a cup of delicious hot tea in real time. Mmm.
There's a video below, which you should check, mate. [OMG SORRY.]