Opening Gym: Chess Openings

Chess Opening Trainer & Drill turns opening study into a five-minute daily habit. Instead of asking you to pick what to review, it hands you one move to learn and the reviews that are due today. Every opening move is scheduled with spaced repetition, so a line you learn today comes back tomorrow, in three days, then a week later, until you remember it over the board. WHAT YOU GET Learn — one decision at a time, with the plan behind the move in plain language: what it does now, what it stops, and what you are aiming for next. Review — a due queue built from your own history. No planning, no course management. Open the app and the queue is already there. Practice — replay any branch you feel shaky on, as often as you want. 60-second Drill — a short timed run over moves you have already learned. Sparring — play the line against realistic replies instead of a single scripted answer. Mastery Map — see which branches are solid and which ones keep slipping. HOW IT IS BUILT Complete London System repertoire for White, structured as 80 decisions across 10 unlocking stages. Every line is mechanically validated for legal moves and consistent branches. Explanations are written for the move in front of you, not copied from a book. Works offline. No account, no sign-up, no cloud sync required. Your progress stays on your device. English and Korean, light and dark themes. WHO IT IS FOR Players around 600-1600 who know the rules, keep losing the thread in the opening ten moves, and want a dependable repertoire without watching hours of theory videos. Opening Gym is an independent app and is not affiliated with any chess federation, online chess platform, or course publisher.