Mittens (chess)

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Mittens is a chess engine developed by Chess.com. It was released on January 1, 2023, alongside four other engines, all of them given cat-related names. The engine became a viral sensation in the chess community, largely due to exposure through content made by chess streamers and a social media marketing campaign, which contributed to record levels of traffic to the Chess.com website and caused issues with database scalability. Mittens was given a rating of one point by Chess.com, but it was evidently much stronger. Various chess masters have played matches against the engine, such as Hikaru Nakamura and Levy Rozman, who drew and lost their games respectively. A month after its release, Mittens was removed from the website on February 1, as expected through Chess.com's monthly bot cycles. In December 2023, Mittens was brought back in a group of Chess.com's most popular bots of 2023. In January 2024, Mittens was removed again. As of September 2026, Mittens has been brought back as a coach.

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