Finally understand why you keep losing, making the same mistakes, and missing better moves

You play chess regularly and analyze your games – yet you still keep making the same mistakes without fully understanding why.

Your Elo stagnates, you lose games that might have been avoidable, or only realize afterwards that you missed something decisive.

The problem: A traditional chess engine can tell you which move would have been better, but not necessarily why you did not find it yourself – and what you can do better next time.

That is exactly where Rookion comes in.

Rookion is your personal AI chess coach for ambitious beginners, hobby players, and intermediate players. Import a game from Chess.com or Lichess, upload a PGN, photograph a handwritten scoresheet, or play directly against Rookion – then work through the exact moments that decided your game.

Instead of simply showing you the best move, Rookion takes you through your decisions in an interactive, Socratic coaching dialogue and helps you understand what was going through your mind, what you may have overlooked, and how you can approach similar situations better in future games.

What you get with Rookion Pro
• Unlimited interactive AI coaching based on your own games
• Import games directly from Chess.com and Lichess
• Upload PGN files
• Photograph handwritten scoresheets and import offline games
• Play directly against Rookion
• Identify and analyze the critical moments of every game
• Reflect on your decisions together with your personal AI coach
• Better understand tactical and strategic mistakes, blind spots, and recurring thinking patterns
• Receive a summary after every coaching session
• Revisit previous games and coaching sessions whenever you want
• Build your own personal game history and game collection
• Manage your personal opening repertoire
• Fully browser-based in English and German – no installation required

Coaching through dialogue instead of an evaluation bar

The real difference lies in the direction of the conversation.

Instead of simply presenting you with an evaluation and a better move, Rookion digs deeper at the critical moments:

What were you trying to achieve?

What did you expect your opponent to do?

What was the idea behind your move?

What might you have overlooked?

Why did you choose that particular move?

Based on your answers, the coach works with you to uncover where your thinking went wrong – for example, a missed tactical motif, an incorrect evaluation of the position, a false assumption, an unhelpful thinking habit, or a blind spot in your thought process.

And if you get stuck, Rookion supports you with further questions and hints instead of simply leaving you alone with the solution.

The goal is not just to give you the correct answer. Rookion is designed to help you better understand your own decisions, break unhelpful thinking habits, uncover blind spots, and avoid making similar mistakes again in future games.


Learn from the games you already play

You do not need to change your existing chess routine.

Your online games from Chess.com or Lichess, a tournament game recorded on a handwritten scoresheet, or a new game against Rookion's computer opponent can all become training material.

Rookion identifies the critical moments where the course of your game changed and works through them with you step by step.

This allows you to focus on the decisions you can learn the most from instead of having to work through countless engine variations.

Over time, your games, coaching sessions, and summaries also make it easier to recognize which mistakes, ways of thinking, and weaknesses tend to appear repeatedly in your own chess.


What players say about Rookion

“In my very first game, Rookion pointed straight at my blind spot.” — Frank König, Youth Coach, SV Steinhausen

“Honestly, I never really knew how to use my rooks properly before.” — Philipp Gilch, User

“I didn't know a single move can attack and defend at the same time.” — Peter Smith, User


Individual chess coaching – whenever you want it

Not everyone wants to join a chess club, schedule regular lessons, or can afford a personal chess coach.

That is why Rookion is designed to make individual chess coaching simpler and accessible to more players.

You can train whenever and wherever you want and work with the games that are personally relevant to you – without fixed appointments and without having to book a personal coach every time.

If you already work with a coach or play at a chess club, Rookion can complement your training between lessons, club nights, and tournaments.


Chess AI built specifically for coaching

General-purpose AI tools can misunderstand chess positions or generate explanations that do not match what is actually happening on the board.

Rookion has been developed specifically for AI-powered chess coaching and combines AI coaching with multiple verification, consistency, and safety mechanisms designed to reduce incorrect or contradictory chess explanations to a minimum.

Rookion is also being developed closely together with players, coaches, chess clubs, and the wider chess community. Real user feedback directly influences what gets improved and built next.

The goal is not simply to build another chess analysis tool, but to create a personal training companion that helps you understand your own chess and improve over time.

Turn the games you already play into meaningful training – and learn not only which move would have been better, but why you can find it yourself the next time.


Rookion Pro – 12 months

Your BitsDuJour license gives you full access to Rookion Pro for 12 months from the date of redemption.

There is no automatic renewal. After the 12 months, you decide for yourself whether you want to continue using Rookion Pro.

Rookion runs completely in your browser. There is no software to download or install.

Requirements: A current web browser and an internet connection. Rookion is available in English and German.

After you purchase Rookion, it may be used for 12 months.