ChessMem: Chess Openings

Chess openings, traps and tactics that stick: spaced-repetition practice with AI explanations. Add your own lines, paste a PGN, scan a diagram or set up any position.

One of the most versatile chess training apps there is: 162 openings, 27 traps, 44,000 rated tactics, your own lines, scanned book diagrams, any position you can set up — all memorized through spaced repetition.

ChessMem turns opening study into something you actually finish. Instead of watching videos and forgetting everything by your next game, you practice master-verified lines through spaced repetition — the app brings them back at the right moment so they stick for good.

HOW IT WORKS Pick an opening. Drag pieces to play the correct moves. Wrong moves show you the right answer. Score 100% and the line enters Mem Mode, where spaced repetition brings it back at increasing intervals — first after a day, then three, then a week, growing from there. By the time you sit down to play, the moves are automatic.

NEW TO CHESS? START HERE A short guide on your first line covers the board, how moves are written (e4, Nf3, O-O), and what every control does — so nothing is guesswork. Reopen it any time from Help.

TACTICS AND CHECKMATE PATTERNS 44,000 rated puzzles from the Lichess open database, served around your level, with your own puzzle rating that moves on your first attempt at each one. Drill the named checkmates on their own — smothered mate, back-rank, Anastasia's and more — until you see them on the board.

ADD YOUR OWN LINES AND POSITIONS Your repertoire isn't only what we ship. Record moves on the board, paste a PGN or FEN, scan a page from a chess book with your camera, or set up any position in the board editor. Photograph a diagram from an endgame or tactics book and play it out as often as you like. Anything you add practices and memorizes exactly like a built-in opening, syncs across your devices, and exports as PGN to send to a friend, a coach or a student.

OPENING TRAPS 27 tactical traps built into the openings — lines that win games when your opponent walks into them. Learn the traps in your favorite openings, recognize them when opponents try them on you, and add a few sneaky weapons to your own repertoire.

A REAL REPERTOIRE, NOT JUST A LIST • 162 curated openings, 12,700+ lines • Up to 15 moves deep on main lines • Every move verified against the Lichess Masters Database • A depth slider you control — main line only, then key lines, common deviations, or everything, one opening at a time

A STARTER REPERTOIRE IN ONE QUESTION Not sure what to learn first? Answer one question about the kind of chess you want to play — Classical, Aggressive, Creative, Complex or Practical — and a White opening plus answers to both 1.e4 and 1.d4 go straight into your Favorites. Changeable whenever you like.

AI EXPLANATIONS AND PLANS Stuck on why a move is the right one? Tap for a plain-English explanation of the idea behind it — the threat, the plan, the alternative your opponent has to worry about — demonstrated on the board, move by move. It works on tactics as well as openings. Every opening also comes with a plan: what you're aiming for, and what your opponent wants.

LEARN FROM YOUR REAL GAMES Connect your Chess.com username and get a report on the openings that are actually costing you points, so you know which lines to drill next.

TRACK PROGRESS, EARN BADGES Every opening fills in as you complete lines and variations. Hit 100% on every line and you earn a permanent badge — go gold by topping the leaderboard. Favorites, Mem Mode and progress bars keep you focused on what needs work.

SYNC ACROSS DEVICES Sign in once and your progress, favorites and review schedule travel with you between iPhone, iPad and the web.

FREE TO START Five lines and five tactics every day, with retries free. Premium removes the limits and unlocks unlimited AI explanations, book scanning and full game reports.

Stop reviewing the same openings and start memorizing the moves that win games.

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