Chessigma

Chessigma is a free, unlimited chess game analysis tool powered by Stockfish 17, the strongest open-source chess engine in the world. Unlike Chess.com, which limits free users to one game review per day, Chessigma has no paywall and no daily cap. You paste a PGN or type in your Chess.com or Lichess username, pick a game, and get a full analysis report in seconds.

Every move gets a grade ranging from Brilliant down to Blunder, based on centipawn loss. You also get an overall accuracy percentage, the opening you played, an evaluation graph that shows how the advantage shifted, and the best engine move for every position. The analysis runs directly in your browser using Stockfish 17, which is how they keep the service completely free.

Chessigma is a solid pick for players who want serious analysis without a subscription. It covers the same core metrics you would get from a premium review on other platforms, just without the cost or the daily limit. If you play regularly and want to study your games deeply, this tool removes every barrier to doing that.

The platform is clean and simple: no account needed, no ads obscuring the board, just paste and analyze. For casual players and serious improvers alike, Chessigma is one of the most practical free tools available right now.