Theoria, your chess opening trainer
Great games start
with understanding.
Understand each move with a FIDE Master’s explanations, then play the line from memory. Try an opening below, free and without an account.
Try a few lines from any opening. No account needed.
Keep your brain on its toes
More ways to make it stick.
Test your memory. Spot a tactic. Find your favourite way to learn.
Web, iOS and Android
Theoria, your chess opening trainer
Learn the why behind the move. Then make it yours with guided practice and lessons connected to your own games.
English, French and Russian
What players say
Excerpts from public reviews of the mobile app.
“Awesome for intermediate players who are trying to learn openings and actually understand what’s behind them!!”
“The best chess opening trainer I have tried so far. Thank you!”
Bring a plan to your next game
Make your first moves count.
One line. A master’s explanation. Your turn to play.
Bring your repertoire to life.
Rehearse your lines, then use your own games to choose what needs another look.
Save your thinking for later.
Still pondering move five? Practise recalling your opening before the clock starts.
See the idea. Play with a plan.
Draw the connections. Revisit your games. Know what to work on next.
Make the threats visible
Draw attack and defence arrows on the web board. Counters add up the connections you mark.
Find your recurring detours
Import Lichess or Chess.com games. See where you leave your repertoire and pick a line to revisit.
Bring your games to the lesson
At matching Study positions, see how often you departed in your imported games. Practise the move with that history in view.
Your first line is on us.
Play a sample right here. Create a free account when you want to save your progress.
- Two starter lines per opening, or all lines in its free variations
- One Daily Pro Line preview per opening
Go deeper with Pro.
Keep going when the opening gets interesting.
- Every opening line, advanced variation and sideline
- Monthly, annual or lifetime access
Standard web prices in EUR. Offers and local pricing are shown at checkout.
Your opening, explained by a master.
FIDE Master and the chess educator behind MaxounChess, Max prepares Theoria’s opening lessons to help you understand the plan and make your next move with purpose.
Take Theoria with you
Your next game starts here.
Keep learning, revisit your tricky lines, and take a little more confidence to the board.