Draft:Chessiverse

• Comment: You appear to be the social media manager for this company. Please address your WP:COI. Greenman (talk) 10:53, 10 May 2026 (UTC)

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Chessiverse is an online chess platform that allows players to compete against artificial intelligence bots designed to simulate human-like play. The platform offers over 650 bots with distinct personalities, playing styles, and skill levels, as well as daily puzzles, training tools, practice modes, and educational courses. Chessiverse was founded in 2024 and is headquartered in Stockholm, Sweden.

Founding

Chessiverse was created by Jonatan Pettersson, a former Spotify software engineer with a FIDE chess rating of approximately 1908, who built the first version of the platform entirely himself. Pettersson is also the author of Mediocre, a well-known open-source Java chess engine, giving him a deep background in chess programming prior to founding the company. He is joined as co-founder by Björn Torstensson, a Swedish product manager who serves as CEO.

The platform was conceived out of a desire to address what the founders saw as a gap in the existing online chess landscape: the absence of bot opponents that play in a genuinely human-like way. Pettersson cited the stress of playing anonymous human opponents online — rating anxiety, unpredictable time pressure, and the lack of personality in conventional engine play — as motivations for building a more engaging alternative. The platform drew inspiration from classic software such as Chessmaster, which was noted for its memorable computer opponents with distinct characters.

David Kramaley, co-founder of Chessable, joined Chessiverse as an investor and strategic advisor in October 2024. In a post on his personal blog, Kramaley referenced Chessiverse as an example of a "counter-positioned" product capable of standing out in the competitive attention economy — one that attempts to meet users' needs in a way that larger platforms have not.

In mid-2025, International Master John Bartholomew joined as a co-founder. Bartholomew is an American chess player (born September 5, 1986, in Eagan, Minnesota) who became an International Master in 2006 and is widely regarded as one of the most prominent chess educators online, with over 200,000 YouTube subscribers. He previously co-founded Chessable, a chess learning platform launched in 2016 and acquired by Play Magnus AS in 2019, alongside Kramaley.

Chessiverse was first discussed publicly by Bartholomew in an interview on the Chess Journeys podcast, hosted by Dr. Kevin Scull, in its 218th episode. The platform subsequently became a recurring sponsor of the podcast. Bartholomew also discussed the platform at length in episode 461 of the Perpetual Chess Podcast in November 2025, describing the challenges and rewards of building the product.

Technology

The core technology underlying Chessiverse is its proprietary AI system, branded as PersonaPlay™. Unlike conventional chess engines, which are optimised for strength and precision, PersonaPlay bots are designed to replicate the patterns, tendencies, and imperfections of human players at specific skill levels.

Each bot is built with a unique opening book, drawn from a library of over 1,000 curated opening variations, and incorporates more than one million pre-prepared moves reflecting realistic human decision-making. Bots are trained on games from Lichess, a free open-source chess server, allowing their move selection to reflect how genuine human players of comparable strength approach the game.

Bot ratings on Chessiverse are calibrated against real FIDE ratings, meaning a bot rated 1500 on the platform is intended to play at the same level as a 1500-rated over-the-board player. This calibration uses bot-versus-bot games and anchor bots to verify rating accuracy.

The platform has been produced in successive generations, with each iteration improving the authenticity of bot play. Bots are described as having distinct personalities, named characters, preferred opening repertoires, and playing styles — some favouring aggressive kingside attacks, others solid positional chess. A rewards system using in-platform currencies (Gold Stars, Blue Crystals, and Redstones) allows players to unlock additional content as they progress.

Chessiverse is also compatible with physical electronic chess boards via board connectivity software; it is listed as a supported platform on ChessConnect, making it suitable for players who prefer practising on hardware rather than a digital interface.

Courses

Chessiverse offers an educational component available to Premium subscribers, centred around video content produced by IM John Bartholomew. As of late 2025, the platform hosted more than 24 long-form instructional videos covering chess openings, middlegame themes, and improvement concepts, with many episodes exceeding one hour in length.

The platform's flagship course is The Comprehensive Scandinavian, a detailed treatment of the Scandinavian Defence (3...Qa5) prepared by Bartholomew. The course was discussed during his appearance on the Perpetual Chess Podcast in November 2025, where it was described as his most thorough resource on the opening.

Beyond video content, the platform offers daily puzzles, opening practice tools, and a challenge mode. Players can use the Practice section to repeatedly play specific openings against bots that respond with realistic lines, or to set up and work through particular positions.

Reception

The platform has received positive coverage among chess enthusiasts. A review on Chess.com described the bot roster as offering remarkable variety and authenticity, noting compatibility with electronic chessboards as a practical feature for dedicated players. A user review on Medium described Chessiverse as the platform the author had been looking for over several years, noting that bot availability eliminates the wait time associated with human opponents and that the quality of play made the experience feel like facing a real person.