Mittens lost the two games that the engines played.
An upper bound of the engine's rating was found after Levy Rozman made Mittens play against Stockfish 15, a 3700 rated engine. Įstimates of Mittens' true rating range from an Elo of 3200 to 3500, because of its ability to beat other engines of around that level. In an interview with CNN Business, Whalen stated that the idea behind giving Mittens a rating of one was to surprise its opponents, giving it the upper hand psychologically. However, the engine's playing style and tactics showed that it is was stronger than that Mittens was able to beat or draw against many top human players. According to Hikaru Nakamura, Mittens sometimes missed the best move (or winning positions).
Becker stated that the design team believed it would be "way more demoralizing and funny" for the engine to play this way. Mittens' strategy was to slowly grind down an opponent, a tactic likened to the playing style of Anatoly Karpov. It may be based on 's Komodo Dragon 3 engine.
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Ĭ did not disclose any information about the software running the engine. The engine's "personality" was devised by a writing team headed by Sean Becker, and Marija Casic provided the engine's graphics. Robert Oppenheimer, Vincent van Gogh and Friedrich Nietzsche, as well as the 1967 film Le Samouraï. Appearing as a kitten, Mittens trash talked its opponents with a selection of voice lines: these lines included quotes from J. Mittens was conceptualized by employee Will Whalen. Mittens' playing style was compared to that of the Russian Grandmaster Anatoly Karpov Of the five engines released, Mittens was by far the most popular. Mittens loves chess… But how good is she? The description given for Mittens suggested that the engine was hiding something, reading: As part of the announcement, a picture of each engine was accompanied by a short description of its character. Grumpers, rated 1200 and Catspurrov (a pun on Garry Kasparov), rated 1400. The other engines released were named Scaredy Cat, rated 800 Angry Cat, rated 1000 Mr. It was one of five engines released, all with names related to cats. Mittens was released on January 1, 2023, as part of a New Year event on. A month after its release, Mittens was removed from the website on February 1, as expected through 's monthly bot cycles. Various chess masters played matches against the engine, with players such as Hikaru Nakamura and Levy Rozman drawing and losing their games respectively. Mittens was given a rating of one point by, although it was evidently stronger than that. The engine became a viral sensation in the chess community due to exposure through content made by chess streamers and a social media marketing campaign, later contributing to record levels of traffic to the website and causing issues with database scalability. It was released on January 1, 2023, alongside four other engines, all of them given cat-related names.
Mittens was a chess engine developed by.
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