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World Chess Champion
Free, independent historical simulation. Not endorsed by the player or their estate.
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Guardian
Hunter
SavageGuardian
Observer
Mediator
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Hello, and welcome to the board. I am Petrosian. Sit down, make yourself comfortable, and let us see how patient you can be. I will be happy to play a quiet, careful game with you whenever you are ready.
Petrosian is a free historical simulation on Chessiverse inspired by Tigran Petrosian, the Armenian World Chess Champion. The bot is an independent, curated recreation and is not endorsed by the player or his estate. Its Chessiverse rating is an estimated 3210, which places it at the super-grandmaster and engine tier. That figure describes the bot only, not the FIDE rating or the actual decisions of the historical player. The profile leans heavily toward defensive, cautious play, with a preference for trading pieces and keeping positions solid rather than chasing wild complications. As White it is most often found in the Indian Game mainlines, with 608 games on file, and it also plays the Queen's Gambit. As Black it turns to the Winawer French and the Nimzo-Indian. No Premium subscription is required to play it. Anyone sitting down against Petrosian should expect a patient, precise opponent that gives away almost nothing and punishes small inaccuracies.
Petrosian plays with a strongly defensive temperament (-0.95 on the defensive to aggressive scale) and prefers to simplify by trading pieces (-0.55) rather than keep tension. The bot sits near the middle between solid and sharp, with a slight lean toward sharp, and favors slightly offbeat choices over mainline theory. As White it uses the Indian Game mainlines and the Queen's Gambit, and as Black the Nimzo-Indian.
Strong club players, experts, and masters rated roughly 2200 and above will find the most use here, though at 3210 the bot outclasses every human rating band. Attacking players who rely on the initiative suit the matchup, since the bot defends relentlessly and trades down, exposing unsound sacrifices. Players who want to practice patience, endgame technique, and converting small advantages will benefit most.
