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The collection

Opening Library

Choose from 100+ openings

Free courses

Fried Liver Attack Free
10 lines Learn Practice Time trial
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Vienna Opening
10 lines Learn Practice Time trial
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Jobava London System
10 lines Learn Practice Time trial
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London System
10 lines Learn Practice Time trial
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Sicilian

Sicilian: Najdorf Unlimited
11 lines Learn Practice Time trial
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Sicilian: English Attack Unlimited
10 lines Learn Practice Time trial
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Sicilian: Dragon Unlimited
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Sicilian: Yugoslav Attack Unlimited
12 lines Learn Practice Time trial
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Sicilian: Accelerated Dragon Unlimited
11 lines Learn Practice Time trial
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Sicilian: Maroczy Bind Unlimited
12 lines Learn Practice Time trial
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Sicilian: Hyper-Accelerated Dragon Unlimited
10 lines Learn Practice Time trial
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Sicilian: Sveshnikov Unlimited
11 lines Learn Practice Time trial
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Sicilian: Kalashnikov Unlimited
10 lines Learn Practice Time trial
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Sicilian: Löwenthal Unlimited
11 lines Learn Practice Time trial
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Sicilian: Scheveningen Unlimited
12 lines Learn Practice Time trial
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Sicilian: Keres Attack Unlimited
10 lines Learn Practice Time trial
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Sicilian: Classical Unlimited
10 lines Learn Practice Time trial
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Sicilian: Richter-Rauzer Unlimited
11 lines Learn Practice Time trial
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Sicilian: Sozin Attack Unlimited
11 lines Learn Practice Time trial
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Sicilian: Boleslavsky Unlimited
10 lines Learn Practice Time trial
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Sicilian: Taimanov Unlimited
12 lines Learn Practice Time trial
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Sicilian: Kan (Paulsen) Unlimited
12 lines Learn Practice Time trial
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Sicilian: Four Knights Unlimited
10 lines Learn Practice Time trial
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Sicilian: Pin Variation Unlimited
11 lines Learn Practice Time trial
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Sicilian: Rossolimo Unlimited
13 lines Learn Practice Time trial
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Sicilian: Snyder Unlimited
16 lines Learn Practice Time trial
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Sicilian: Closed Unlimited
13 lines Learn Practice Time trial
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Sicilian: Grand Prix Attack Unlimited
13 lines Learn Practice Time trial
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Sicilian: Smith-Morra Gambit Unlimited
13 lines Learn Practice Time trial
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Sicilian: Alapin Unlimited
13 lines Learn Practice Time trial
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Sicilian: Delayed Alapin Unlimited
13 lines Learn Practice Time trial
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Sicilian: King's Indian Attack Unlimited
12 lines Learn Practice Time trial
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Sicilian: Chekhover Unlimited
13 lines Learn Practice Time trial
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Sicilian: Wing Gambit Unlimited
12 lines Learn Practice Time trial
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Sicilian: McDonnell Attack Unlimited
13 lines Learn Practice Time trial
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Sicilian: Prins Unlimited
10 lines Learn Practice Time trial
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Sicilian: O'Kelly Unlimited
11 lines Learn Practice Time trial
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Sicilian: Nimzowitsch Unlimited
11 lines Learn Practice Time trial
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Open games

Ruy Lopez Unlimited
12 lines Learn Practice Time trial
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Ruy Lopez: Open Unlimited
11 lines Learn Practice Time trial
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Ruy Lopez: Berlin Unlimited
12 lines Learn Practice Time trial
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Ruy Lopez: Marshall Attack Unlimited
11 lines Learn Practice Time trial
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Ruy Lopez: Exchange Unlimited
12 lines Learn Practice Time trial
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Italian Opening Unlimited
13 lines Learn Practice Time trial
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Two Knights Defense Unlimited
11 lines Learn Practice Time trial
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Evans Gambit Unlimited
10 lines Learn Practice Time trial
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Hungarian Defense Unlimited
10 lines Learn Practice Time trial
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Scotch Game Unlimited
11 lines Learn Practice Time trial
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Scotch Gambit Unlimited
12 lines Learn Practice Time trial
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Göring Gambit Unlimited
12 lines Learn Practice Time trial
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Four Knights Game Unlimited
11 lines Learn Practice Time trial
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Belgrade Gambit Unlimited
10 lines Learn Practice Time trial
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Petrov Defense Unlimited
10 lines Learn Practice Time trial
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Stafford Gambit Unlimited
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Philidor Defense Unlimited
11 lines Learn Practice Time trial
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King's Gambit Unlimited
12 lines Learn Practice Time trial
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Danish Gambit Unlimited
11 lines Learn Practice Time trial
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Center Game Unlimited
12 lines Learn Practice Time trial
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Bishop's Opening Unlimited
12 lines Learn Practice Time trial
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Ponziani Opening Unlimited
12 lines Learn Practice Time trial
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Latvian Gambit Unlimited
10 lines Learn Practice Time trial
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Elephant Gambit Unlimited
10 lines Learn Practice Time trial
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Semi-open

French Defense Unlimited
15 lines Learn Practice Time trial
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French: Winawer Unlimited
10 lines Learn Practice Time trial
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French: Classical Unlimited
11 lines Learn Practice Time trial
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French: Tarrasch Unlimited
12 lines Learn Practice Time trial
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French: Rubinstein Unlimited
12 lines Learn Practice Time trial
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French: Exchange Unlimited
13 lines Learn Practice Time trial
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Caro-Kann Defense Unlimited
12 lines Learn Practice Time trial
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Caro-Kann: Advance Unlimited
12 lines Learn Practice Time trial
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Caro-Kann: Classical Unlimited
12 lines Learn Practice Time trial
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Caro-Kann: Panov Unlimited
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Scandinavian Defense Unlimited
12 lines Learn Practice Time trial
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Scandinavian: Modern Unlimited
12 lines Learn Practice Time trial
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Pirc Defense Unlimited
10 lines Learn Practice Time trial
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Modern Defense Unlimited
12 lines Learn Practice Time trial
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Alekhine's Defense Unlimited
12 lines Learn Practice Time trial
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Nimzowitsch Defense Unlimited
12 lines Learn Practice Time trial
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Owen's Defense Unlimited
10 lines Learn Practice Time trial
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Queen's pawn

Queen's Gambit Unlimited
12 lines Learn Practice Time trial
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Queen's Gambit Declined Unlimited
12 lines Learn Practice Time trial
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Queen's Gambit Accepted Unlimited
11 lines Learn Practice Time trial
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Slav Defense Unlimited
11 lines Learn Practice Time trial
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Semi-Slav Defense Unlimited
10 lines Learn Practice Time trial
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Chigorin Defense Unlimited
10 lines Learn Practice Time trial
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Albin Countergambit Unlimited
12 lines Learn Practice Time trial
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Catalan Opening Unlimited
11 lines Learn Practice Time trial
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Trompowsky Attack Unlimited
10 lines Learn Practice Time trial
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Colle System Unlimited
10 lines Learn Practice Time trial
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Veresov Attack Unlimited
10 lines Learn Practice Time trial
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Budapest Gambit Unlimited
10 lines Learn Practice Time trial
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Dutch Defense Unlimited
12 lines Learn Practice Time trial
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Dutch: Leningrad Unlimited
11 lines Learn Practice Time trial
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Dutch: Stonewall Unlimited
13 lines Learn Practice Time trial
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Tarrasch Defense Unlimited
10 lines Learn Practice Time trial
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Semi-Tarrasch Unlimited
10 lines Learn Practice Time trial
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Ragozin Defense Unlimited
11 lines Learn Practice Time trial
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Torre Attack Unlimited
13 lines Learn Practice Time trial
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Blackmar-Diemer Gambit Unlimited
10 lines Learn Practice Time trial
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Indian defenses

King's Indian Defense Unlimited
11 lines Learn Practice Time trial
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Grünfeld Defense Unlimited
10 lines Learn Practice Time trial
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Nimzo-Indian Defense Unlimited
11 lines Learn Practice Time trial
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Queen's Indian Defense Unlimited
10 lines Learn Practice Time trial
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Bogo-Indian Defense Unlimited
10 lines Learn Practice Time trial
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Modern Benoni Unlimited
11 lines Learn Practice Time trial
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Benko Gambit Unlimited
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Old Indian Defense Unlimited
11 lines Learn Practice Time trial
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Flank openings

English Opening Unlimited
11 lines Learn Practice Time trial
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English: Symmetrical Unlimited
11 lines Learn Practice Time trial
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Réti Opening Unlimited
10 lines Learn Practice Time trial
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King's Indian Attack Unlimited
15 lines Learn Practice Time trial
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Bird's Opening Unlimited
11 lines Learn Practice Time trial
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Larsen's Opening Unlimited
11 lines Learn Practice Time trial
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Sokolsky Opening Unlimited
10 lines Learn Practice Time trial
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Community

Member courses

Opening courses published by other players. Your first course is free in Repertoire; extra courses need Unlock Unlimited.

Open repertoire builder Member Directory

No community courses yet. Your first opening course is free — build one in Repertoire and publish it if you want it listed here.

Changelog

What changed

  1. v1.1 Latest

    Evaluation Dashboard, Blunder Override, and Game Review — 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.