DecodeChess explains chess positions in depth using AI. Chess Masti AI does that too — and also turns your mistakes into puzzle drills so you actually train the patterns you keep missing. Both are AI chess coaches; the difference is whether the loop ends at the explanation or continues into practice. Chess Masti is free.
DecodeChess is good at one specific job: taking a single chess position and explaining what is happening in detail. The narrative analysis is thorough and the engine work underneath is sound. If you want a deep written analysis of a critical game position and you do not need anything else, DecodeChess does that well.
The constraint is the subscription. The free tier is limited; the deeper analysis features and unlimited use require paying. Check their site for current pricing — it may have changed since this was written.
Chess Masti is for the player who wants to improve, not just understand. The pipeline: Stockfish evaluates your game, Claude AI explains every critical moment, and your worst mistakes automatically become puzzles you can drill. The training loop is the difference — explanation alone does not move ratings; practice on your own mistakes does.
Everything is free, with no analysis cap. You can also ask follow-up questions about any position, scout your next opponent's opening tendencies, and import games from Lichess or Chess.com directly.
| Chess Masti AI | DecodeChess | |
|---|---|---|
| AI position explanations | Yes (Claude AI) | Yes |
| Engine evaluation | Stockfish (WASM, in-browser) | Stockfish |
| Free for full game analysis | Yes | Limited free tier |
| Mistake-based puzzles | Yes | No |
| Follow-up question chat | Yes | No |
| Opponent scouting | Yes | No |
| Claim validation against engine | Yes | Not documented |
Verified at time of writing. Check DecodeChess' site for current pricing and feature changes.
Use DecodeChess if:
You want deep narrative analysis of a single position and a polished writeup of what is happening on the board.
Use Chess Masti AI if:
You want a free AI chess coach that explains your games, lets you ask follow-up questions, and converts your blunders into drills you can actually practice.
See the full Chess Masti overview
The exact-match page covers the engine + AI + validator pipeline in more detail and includes the longer comparison and FAQ.
Open the free AI chess coach pageTry the free alternative
Paste a PGN or FEN. No account required to start.