ChessMem: Chess Openings

One of the most versatile chess training apps there is: 162 openings, 27 traps, 44,000 rated tactics, your own lines, scanned book diagrams and any position you can set up, with spaced repetition to make the lines stick. Play a game or practice your openings with the AI Coach.
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 until they're automatic.
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.
PLAY AGAINST THE AI COACH
Play a full game from any opening against five engine levels. The coach flags mistakes as they happen and reviews the game with you when it ends.
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. 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. 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 traps built into the openings — lines that win games when your opponent walks into them. Learn the ones in your favorite openings, spot them when they're tried on you, and add a few sneaky weapons of your own.
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.
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 — 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
Every day: five practices across openings, traps and Mem Mode, five tactics, three AI explanations and a coached game, with unlimited retries. Each month: three book scans. Premium removes the limits and adds unlimited AI explanations, more scans, the full opening tree and game reports.
Stop reviewing the same openings and start memorizing the moves that win games.
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