DecodeChess
Explains engine moves in plain English — why a move is strong, not just that it is.
No affiliate relationship with this tool. The link below goes directly to the product site.
Our take
DecodeChess was the first tool I tried that actually answered "why?" in a meaningful way. For intermediate players stuck in the "I see the engine move but don't understand it" rut, the first month felt like working with a much stronger player. But I have to be honest about the trajectory: the product has been in maintenance mode for a while now, and newer tools like Noctie have overtaken it on the conversational side. It still does its one job — narrative annotations on top of Stockfish — but I'd trial the free tier carefully before committing to a subscription.
DecodeChess set out to solve the biggest complaint about engine analysis: the engine tells you what to play, not why. The product combines chess-specific reasoning with language generation to produce annotations that describe plans, weaknesses, and tactical motifs the way a human coach would.
It works on the web, imports directly from Chess.com and Lichess, and offers a free tier with a daily credit limit. Be aware that development has visibly slowed: recent releases have been maintenance fixes rather than new features, so what you see today is likely what you’ll get.
Pros
- Converts raw engine output into readable "White's plan is…" explanations
- Annotates your games without you needing to know what to ask
- Integrates with Lichess and Chess.com for quick import
Cons
- Development has slowed to maintenance updates — no substantial new features in over a year
- The free tier is quite limited — deep analysis requires Premium
- Occasionally over-confident about strategic claims the engine line doesn't clearly support
Related tools
Aimchess
Personalised AI coach that analyses your online games and builds a weekly training plan around your weaknesses.
ChessBase
The professional desktop software for database work, deep analysis, and tournament preparation. Now at ChessBase '26 with AI annotations.
Chess.com Game Review
Chess.com's built-in AI-powered Game Review with a coach avatar that walks you through each move.