Chessigma is a free, browser-based chess analysis platform that provides unlimited game reviews powered by the Stockfish 17 engine. Users can import games from Chess.com, Lichess, or PGN files and receive detailed move-by-move evaluations without any signup or daily limits. The platform also includes an opening trainer with interactive courses for learning key chess openings line by line.
- Artificial Intelligence
- Data & Analytics
- Software Only
Funding
Funding not disclosed
Founders
Product
Problem
Chess players on platforms like Chess.com face significant limitations when trying to review their games, with free users restricted to just one analysis per day and full engine review locked behind premium subscriptions. This paywall prevents players from consistently analyzing their games, which is essential for identifying recurring mistakes and improving their play.
Solution
Chessigma provides a completely free, unlimited chess analysis tool that runs entirely in the browser using the Stockfish 17 engine, the strongest open-source chess engine available. Users simply enter their Chess.com or Lichess username, or paste a PGN file, and receive a full game report in seconds with move-by-move quality grades, centipawn loss values, and an evaluation graph showing turning points. The platform requires no signup, has no daily limits, and works across all time controls including blitz, rapid, bullet, and classical. Beyond analysis, Chessigma offers an interactive opening trainer with structured courses for popular openings like the Sicilian Defense, London System, and King's Gambit, allowing players to learn lines move by move with the board responding to their choices.
Target Audience
Primary users are amateur and club-level chess players who want unlimited game analysis without paying for premium subscriptions, as well as improving players seeking structured opening training to accelerate their development.
Features
- Unlimited game analysis powered by Stockfish 17, the strongest open-source chess engine, running directly in the browser
- Automatic game import from Chess.com and Lichess usernames, plus manual PGN paste or file upload support
- Comprehensive move-by-move report with quality grades, centipawn loss values, and an evaluation graph highlighting game turning points
- Interactive opening trainer with 549 total lines across courses including the Anti-London, Caro-Kann, French Defense, Fried Liver Attack, Italian Game, King's Gambit, King's Indian Defense, London System, Pirc Defense, Queen's Gambit Accepted, Ruy Lopez, Scandinavian Defense, Scotch Game, Sicilian Defense, Open Game, and Vienna Game
- Opening courses tagged with style categories (Positional, Tactical, Defensive, Aggressive, Easy, Bookworm) to match player preferences
- Free chess Elo calculator tool for estimating rating changes before matches
- Optional account creation to save usernames, track multiple players, and access puzzles without affecting analysis functionality