Chess411 - Puzzles & Analysis

Chess411 is a set of free chess tools. No account, no paywall. Everything runs on Stockfish 18, the strongest open source chess engine.

GAME REVIEW
Import your recent games from Chess.com or Lichess by username. Every move gets a verdict, from best move to blunder, each side gets an accuracy score, and a coach's line explaining what the engine wanted instead. Step through the game with the evaluation graph and see the critical moments.

PUZZLES
Unlimited tactics puzzles, sorted by difficulty and theme. Pick forks, pins, mating patterns or endgames, or let the app choose. Solve one after another with a board that feels like a real board: drag a piece, see it land.

DAILY CHALLENGE
The same puzzles for everyone, every day. Three lives, one attempt. Keep your streak alive.

NEXT MOVE CALCULATOR
Set up any position and Stockfish tells you the best move, with the top three lines. It runs on your phone, so it works offline and never sends the position anywhere. Pick a screenshot from any chess app or website and the scanner reads the position for you.

PRIVACY
There is no sign-in and nothing to sell. The app has no analytics or tracking. Game review sends the moves to our engine server and nothing else. Full policy at chess411.com/privacy.