Guides

Practical, no-fluff guides to rating systems and competition formats — how ELO works under the hood, how to pick a K-factor, the recommended way to set up a league for specific games like ping pong, chess, pool, darts, foosball, and basketball, and how to run a fair tournament from seeding to the final. Whether you’re settling an office “who’s the best” argument or running a proper league, start here.

Set up a league for your sport

Recommended settings for specific games — and the reasoning behind each choice.

Rank players fairly by game

How to build a ranking that everyone accepts as fair, sport by sport.