Memorize your openings. Never forget a line.

Stop forgetting your openings: the free chess opening trainer

ChessAtlas is a free chess opening trainer: memorize your repertoire with spaced repetition, and catch where your real games deviate from your prep.
Start for freeExplore the library
  • FSRS Spaced Repetition
  • Lichess & Chess.com Import
  • Curated courses
  • Free to start

Italian Game

Giuoco Piano

Starting...
Starting position

Integrates with your favorite platforms

Lichess
Chess.com
Free to start
No credit card
Secure & private

How It Works

Master your openings in 3 simple steps

  1. 1

    Build Your Repertoire

    Import your games or build your own lines.

  2. 2

    Train with FSRS

    Spaced repetition brings each line back at the right time.

  3. 3

    Track & Improve

    See where you deviate from your preparation.

Everything to improve in openings

Modern tools to learn and remember your opening lines.

What players say

Reviews posted on the App Store and Google Play.

“Best chess opening app I’ve found, and free too”
Jsand_11App Store
“Great app/platform! I only wish there were more courses!”
Ido S.Google Play
“I like to understand by reading books. Structuring my courses according to my own logic and my evolving understanding: this app lets me do that. That, and the flexibility and efficiency of the repetition system, is excellent.”
AequalisApp Store

Translated from French

“Handy for training on my repertoires!”
SandraGoogle Play

Translated from French

Take ChessAtlas with you

Train your openings on iOS and Android, wherever you are.

Download on theApp StoreGET IT ONGoogle Play

Train any opening with spaced repetition

Every major chess opening, each with main variations, traps, and an interactive trainer powered by FSRS.

Browse all openings

Latest from the blog

Opening guides, training methods, and honest tool comparisons - written for real club players.

Read all articles

Frequently Asked Questions

Everything you need to know about ChessAtlas

Yes! The core features are free, up to 200 variations: build repertoires, train with spaced repetition, and import games from Lichess/Chess.com. Premium lifts those caps and adds the Premium course lines.
Spaced repetition is a scientifically-proven learning technique. FSRS (Free Spaced Repetition Scheduler) is a modern algorithm that schedules your reviews at optimal intervals, right before you would forget. This means better retention with less study time.
Absolutely! Import PGN files from any source, or connect your Lichess/Chess.com account to analyze games and build your repertoire from your actual play.
ChessAtlas lets you build YOUR OWN repertoire for free, instead of buying pre-made courses. Plus, ChessAtlas imports your Lichess and Chess.com games and shows where they left your repertoire.
Yes. ChessAtlas has native iOS and Android apps, and the web app works in any browser. Train on your phone during your commute and on the desktop at home: your repertoire and review schedule stay in sync.

Ready to never forget a line again?

Create a free account and start building your repertoire now.

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