Build your repertoire. Never forget it.
Turn the openings you've studied into a White and Black repertoire that actually sticks. Engine-verified tests prove you know each line — and a 90-day review cycle keeps it sharp months later.
From studied to remembered
Study the opening
Work through an opening lesson and learn the plan behind each move, not just the sequence.
Add it to your repertoire
Drop any opening into your White or Black repertoire — your study and your lines, all in one place.
Master it, then keep it
Pass the test to earn "mastered," then let the 90-day reviews make sure it never fades.
Play the line
1.e4 e5 2.Nf3 Nc6 3.Bb5
From memory — no peeking
Answer the ideas
Why does White play Bb5?
Play the line perfectly and score 80%+ to master an opening.
You have to prove you know the line
Saving an opening isn't knowing it. To master one here you play the whole line from memory and answer Stockfish-verified questions about the ideas behind it — 80%+ and a perfect line to pass. No guessing your way through.
Mastery fades — a 90-day review brings each opening back before it does.
Master it once, then never let it fade
The opening you drilled in January is useless if it's gone by April. Master an opening and it locks in — then 90 days later it resurfaces for review, so you catch the fade before a real game does. Every opening shows its status, from added to needs-review.
Everything to build a repertoire that sticks
White & Black, side by side
Keep a separate repertoire for each color — build the lines you actually play.
Built from 100+ lessons
Add any opening lesson straight into your repertoire — study and drilling in one flow.
Engine-verified tests
Five Stockfish-verified questions per opening — real positions and answers, not trivia.
Know what's slipping
Every opening shows its status and your latest score, so nothing fades unnoticed.
Build a repertoire that lasts.
Master your openings and keep them for good — White and Black, all in one place.
Build your repertoire