Proton Chess combines spaced-repetition science with the world's richest opening database. Learn variations, track retention, and build a repertoire that sticks — not one you'll forget by your next game.
From your first pawn move to grandmaster-level preparation — one app handles your entire opening education.
Each opening is structured into stages that unlock progressively. Early stages are free — deeper preparation requires going further.
Every position you play generates a memory card. The algorithm schedules exactly when you need to review — drilling only what you're about to forget.
Track your retrievability score per variation — the percentage chance you'd recall that move right now. Watch it build over time.
After each stage, a timed spot check fires positions from all variations at random. No arrows, no hints — just recall under pressure.
Tactical puzzles with virtual ELO tracking. Sharpen your analytical skill.
Build custom repertoires from all variations.
A structured path that builds chess knowledge the right way — tactics first, then openings, then long-term retention.
Solve Find the Best Move puzzles to reach a minimum ELO rating. Analytical skill unlocks opening study — the right order matters.
Pick White and Black openings from the full catalog, pre-seeded with your most-played lines from Lichess and Chess.com.
Each variation is a playable tutorial — arrows for learning, then blind play. Familiar trunk moves are automatically skipped for variations that share them.
The algorithm computes your next review date per position. Spot checks fire at stage completion. Your skill level updates from Beginner → Super Grandmaster.
Curated repertoires from chess history's most celebrated players. Each collection is fully staged and drillable — study the exact variations Magnus, Kasparov, and Fischer played at the top level.
Designed for players who want long-term retention, not short-term familiarity they forget after one week.
The algorithm tracks retrievability for every board position. You'll know exactly how well you remember each line — and the app reviews it just before you'd forget.
A puzzle ELO and weekly solve gate ensures you're building analytical vision alongside memorisation — the order that actually works at the board.
Sync with Lichess or Chess.com and the app pre-selects the openings you already play most. Study what you need, not a generic curriculum.
Stage completions trigger blind spot checks — no arrows, random variation order. The same conditions you face over the board.
My Collections lets you hand-pick any of the all variations, choose your side, and get a fully-staged study path generated automatically — with spot checks included.
Opening memorisation without tactical vision is a leaky bucket. Proton Chess requires you to build pattern recognition first — then every opening line you learn becomes a weapon you can actually use.
Once you reach the minimum puzzle ELO and solve a handful of puzzles per week, openings, Legends' Openings and legend game content unlock automatically.
Opening memorisation is most effective when combined with strong pattern recognition. Solve a few more puzzles to build that foundation.
Download Proton Chess and start building a repertoire that stays with you — from first move to endgame preparation.
Free to start · Subscription unlocks full catalog