All features

Eight areas, one trainer. Pick a feature below to see how it works.

The trainer

Learn the idea, then play it without help

Four modes that build on each other: browse the line, learn why each move is played, practise it with nothing in front of you, then prove it against the clock.

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Opening library

100+ opening courses, organised the way openings are

Every official course grouped by family - Sicilian, semi-open, queen's pawn, Indian defences and more - each one trainable as White or as Black.

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Repertoire builder

Build a repertoire that fits your games

Pick the lines you want to play with White and the defences you meet as Black, then train the whole thing as one connected repertoire.

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Endgames Vault

Checkmate drills that actually stick

The same trainer, now for the basic mates and the classic rook endings. Learn the technique, then convert it without help.

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Game Review

See the whole game at once, without the engine noise

Upload your game and the trainer shows, move by move, where the position crossed into unfamiliar territory - the exact spots your opening preparation ended.

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Blunder Override

Find the mistakes hiding in your opening prep

A focused pass over your recent games that finds the positions where you left your prepared opening lines behind - the blunders that a little extra drilling would have prevented.

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Evaluation

Practice data that points at your next study session

A dashboard across your openings, endgames, and puzzles that answers one question: what needs another round of practice this week.

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Puzzles

99,000+ puzzles matched to your rating

Tactics puzzles that stay in the rating band you are actually playing at, with enough thematic variety that you do not memorise the shape of the solution.

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Changelog

What changed

  1. v1.1 Latest

    Evaluation Dashboard, Blunder Override, and Game Review โ€” tools that help you understand your own play.

    • added Evaluation Dashboard: Tracks your ratings across Chess.com and Lichess while analyzing which openings you play most.
    • added Blunder Override: Replays your past games to walk you through the exact moments where you threw away a win.
    • added Game Review Feature: Imports your games or pgn so AI coach can break down your games move by move.
  2. v1.0

    The first build: opening trainer, endgames vault, progress tracking, repertoire builder, community courses, and live puzzles.

    • added Opening Trainer: The opening trainer, with 100+ official starter courses (work in progress).
    • added Endgames Vault: King opposition, Lucena, Philidor, King and rook mate, King and queen mate.
    • added Progress tracking: Tracks your personal learning progress, puzzle ratings, and daily practice streaks.
    • added Repertoire Builder: Lets you build and drill your own custom opening courses as White or Black.
    • added Community Courses: publish a course to share with other players.
    • added Live Puzzles: Features an all-time rating leaderboard that updates in real-time as you solve.