Chessigma in 2026: Free Unlimited Chess Analysis Powered by Stockfish 17

If you have ever wanted serious chess analysis without paying for a subscription, Chessigma is worth bookmarking right now. Chessigma is a free, browser-based chess analysis tool that uses Stockfish 17, the strongest open-source chess engine available. You paste a PGN or type in your Chess.com or Lichess username, pick a game, and get a full analysis report in seconds. No account needed. No daily cap. No paywall. ## Why This Tool Stands Out Chess.com limits free users to one game review per day, and full engine access sits behind a premium subscription. Chessigma removes all of that friction. The analysis runs directly in your browser, which is how they keep the service free for everyone, and the depth of the report matches what you would expect from a paid platform. Every move gets graded on a scale from Brilliant down to Blunder, based on centipawn loss calculations from Stockfish 17. You also receive an overall accuracy percentage for both sides, a labeled opening, an evaluation graph that shows how the advantage shifted throughout the game, and the engine best move for every position. ## Who Built It and How It Works Chessigma is a web-first product built around the principle that strong analysis should be free and accessible. The team built their own analysis pipeline on top of Stockfish 17 and made the whole thing run client-side in the browser, which removes server cost barriers and keeps the service open to everyone. The interface is clean and focused. You do not need to create an account, navigate through a dashboard, or remember a login. Paste your game, hit analyze, and start reviewing. ## What You Get in the Report The full analysis report from Chessigma includes move-by-move grading, accuracy scores for both players, an opening identification, a visual evaluation graph, and the Stockfish best move shown alongside your actual move. This gives you a clear picture of where the game turned, which moves were the biggest mistakes, and what the engine preferred at each critical moment. For players who review games regularly, this is genuinely useful data. The evaluation graph alone can tell you where your preparation ended and where you started improvising under pressure. ## Pricing Chessigma is completely free. There are no plans, no premium tiers, and no limits on how many games you can analyze. This makes it a practical daily tool for anyone who plays regularly and wants to study their games without a subscription commitment. ## Who It Is For Chessigma is a strong fit for club players, tournament competitors, and online players at any level who want to study their games without the cost of premium memberships. It is also useful for coaches who want to quickly pull analysis on student games without logging into multiple platforms. If you are already on Chess.com and hitting the daily review limit, Chessigma is the obvious overflow tool. If you play on Lichess, it connects just as easily. ## Where to Find It You can try Chessigma directly at chessigma.com, and it is listed in the TrendingChess.com directory at trendingchess.com/chessigma alongside other free chess tools and analysis platforms.