Chess analysis and training without an account
Analyze PGN, play Stockfish, train openings and create printable chess diagrams. Everything stays in your browser.
Chess tools in one place
Use the board without registration. The heavy engine loads only when you request analysis.
Chess game analysis
Paste a PGN and analyze positions locally with Stockfish.
PGN analyzer
Inspect moves, comments and engine evaluation for a complete game.
PGN editor
Edit headers, moves, comments and game variations.
FEN editor
Set up a position, validate it and copy its FEN.
Chess position editor
Place pieces on the board and prepare a position for analysis.
Play chess against computer
Play locally against Stockfish at a chosen level.
Online chess clock
A two-player clock with increment and a full-screen layout.
Chess diagram maker
Create annotated diagrams for PNG, SVG and PDF.
PGN and FEN converter
Extract a final position or create a PGN from a custom starting FEN.
Private by design
Local engine
Stockfish runs in a Web Worker on your device.
PGN & FEN
Open, edit and export standard chess formats.
Training
Rehearse openings, tactics and coordinates.
Create diagrams, worksheets and score sheets.
FAQ
Is Stockfish sent my game?
No. The engine runs locally in a separate browser worker.
Can I use the site without an account?
Yes. Saving is local and optional.
Is this an official tournament tool?
No. Rules and clock features are educational and do not replace a tournament arbiter.