Now in your browser

Your opening
shouldn't be a coin flip.

Learn the plan behind every line, drill the ones you keep getting wrong, and reach move 15 knowing exactly what to do. Right in your browser.

  • Free to start
  • No credit card
  • Built with a FIDE Master
theoriachess.app/dashboard/training/vienna-gambit
Theoria study mode in the browser: a Vienna Gambit line with a hint arrow on the board, a Stockfish evaluation bar and the FIDE Master's move commentary beside it.
2,000+
players training every month
350+
annotated opening lines
5,000+
puzzles born from real openings

How it works

Pick. Learn. Remember.

  1. Pick your opening

    Find an opening that fits your level and style.

  2. Learn the plan

    Play through each line with a FIDE Master’s explanations.

  3. Make it stick

    Practise without hints. Revisit the moves you miss.

Features

Take it to your next game.

Beta

Spot where you go wrong

Import your Lichess or Chess.com games to find where you leave your repertoire.

Train the tactics you’ll need

Solve puzzles from your openings. Recognise the same patterns over the board.

Pricing

Free to start.
Pro when you're hooked.

Every opening's core lines are free, plus one Pro line unlocked every day. Upgrade when you want the whole repertoire.

Free

€0forever

Enough to learn your first opening properly.

  • Core lines of every opening
  • One Pro line unlocked daily
  • Daily practice and mistake review
  • 5 quizzes a day, daily puzzles
  • Import your last 30 games
Start free

Pro

Most popular
Monthly, annual or lifetime

The whole repertoire, for less than a chess book.

  • Every line of every opening
  • Advanced variations and sidelines
  • Unlimited quizzes
  • Analyse up to 300 games, refreshed hourly
  • Priority support
See Pro plans

Prices shown at checkout in your currency. Cancel anytime.

iOS + Android

Same account,
in your pocket.

Prefer to drill on your phone? The Theoria app has the same openings, the same coach, and the same progress. Sign in once and pick up where you left off.

  • Everything syncs with the web app
  • Practice a line in the time it takes to make coffee
  • Free to download, Pro works on every device
Download on the
App Store
Get it on
Google Play
Theoria iOS app showing study mode for the Vienna Gambit with move commentary.

Stop gambling on
the opening.

Start free, in your browser. Your first line takes about five minutes.

Start training free

Prefer the app? App Store · Google Play

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