HackerDome

HackerDome is a real-time, player-versus-player programming puzzle duel. Race a competitor to solve a puzzle, or spectate and watch the chaos unfold as matches play out. Sabotage is part of the format.

The site presents itself as a deliberately non-serious take on the programming interview process, which it describes as a race to the bottom. Its stated purpose is to add a little whimsy to a serious field, and it says so openly.