Game analysis with explanations in Polish

The engine will show where the party has tilted. An explanation in Polish will tell you why the move was a mistake and what was better.

In short: you paste the game in PGN notation, select the file or download the latest games from Lichess by username. The Stockfish engine analyzes every move in your browser and classifies it (best, good, inaccurate, error, gross error), and you get a short explanation in Polish for the most important mistakes. The batch is not sent anywhere.

Three ways to load a batch

• Paste PGN: from any website or program.
• Select the .pgn file: for example, export from a tournament application.
• Download from Lichess: up to 20 most recent public games by username.

What do you get after analysis

• Graph of the evaluation process with marked batch returns, also available as a text table.
• A classification of each move and a summary of both sides' accuracy.
• Explanations in Polish for key mistakes: what was missed and what was the better plan.
• Possibility to go to any position and check the proposed variants.

Two analysis modes

• Szybka: first batch image in budget up to 30 seconds.
• Deep: trzy linie silnika na ruch, budżet do 3 minut; analizę można w każdej chwili przerwać.

Privacy and limits: no fine print

• Cała analiza liczy się lokalnie, w Twojej przeglądarce; wklejona partia nie opuszcza urządzenia.
• Import z Lichess wysyła do Lichess podaną przez Ciebie nazwę użytkownika. Poza tym, jeśli wyrazisz zgodę, działają statystyki odwiedzin Google Analytics; bez zgody nie wysyłamy nic.
• Input limits protect the browser from hanging: PGN up to 256 kB and 600 half-moves.
• The explanations are heuristic: they accurately name common mistakes, but they cannot replace a trainer.

It's best to practice any mistakes you find right away: motifs from your games can be found in tactical training, and you will fill in the gaps in the basics in chess learning course or on the website rules of chess. You will play a new game for analysis with computer.

It works offline after your first online visit on this device, but the engine (approximately 7 MB) downloads the first time you run the analysis. Application installation is not required.