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In this 2017 GDC talk, Twitch's Mario Izquierdo exposes the math behind standardized ranking systems like Elo and TrueSkill to help you develop your own ranking system.
It was an in-depth, math-centric talk that offered up a lot of useful insights, especially if you're working out how to design a great ranking system for your own game.
If you didn't get a chance to catch it live at GDC 2017, good news: you can now watch Izquierdo's talk for free over on the official GDC YouTube channel!
In addition to this presentation, the GDC Vault and its accompanying YouTube channel offers numerous other free videos, audio recordings, and slides from many of the recent Game Developers Conference events, and the service offers even more members-only content for GDC Vault subscribers.
Those who purchased All Access passes to recent events like GDC or VRDC already have full access to GDC Vault, and interested parties can apply for the individual subscription via a GDC Vault subscription page. Group subscriptions are also available: game-related schools and development studios who sign up for GDC Vault Studio Subscriptions can receive access for their entire office or company by contacting staff via the GDC Vault group subscription page.