Skip transpositions: Don't practice lines that reach the same position by a different move order
Mem Mode
Auto-add aced lines to Mem Mode: Lines you complete at 100% (on any attempt) are added to spaced-repetition review automatically. If off, you'll get an "Add to Mem Mode" option on the completion screen.
Daily review limit: How many due reviews are served each day per opening (most overdue first)
Sidebar
Style:
Heads up: spaced repetition (Mem Mode) review isn't shown in Dropdown List mode. Switch back to Roller Picker to see your due reviews.
Click behavior:
Immediate: Click starts practice, shows sub-variations if any. Navigate: Click sub-variations first, practice starts on final selection.
Sign In
Sign in to sync your progress across devices.
Account
Email:-
Sign out to switch accounts or use the app without an account.
Help us out
Enjoying ChessMem? A quick review helps other chess players find the app.
Feedback
Spotted a bug or have an idea? Tell us — we read every message.
Your progress is synced across devices when signed in.
Reset memorised opening:
Memorised lines:0
Game Analysis
Get a personalised analysis of your Chess.com games — opening repertoire, rating trends, strengths, and an improvement plan.
Analysing your games...
This may take a couple of minutes.
Badges ▼
Earned permanently by memorising all lines in an opening.
Leaderboard ▶
Display name — shown on the leaderboard and in your account. Leave blank to use your sign-in name; set one to appear on the leaderboard.
Version —
How to Use ChessMem
ChessMem helps you memorise chess openings through active recall, structured repetition, and master-verified opening trees.
What's New
Daily review limit: Settings → Preferences → Mem Mode lets you cap how many due reviews are served each day per opening (5/10/15/All). When an opening has more due than the cap, the most-overdue lines come first; the rest roll to the next session. Your review schedule is never changed — only how many you see at once
Auto-add control: Same Mem Mode settings — turn off "Auto-add aced lines" if you'd rather hand-pick what enters spaced repetition. When it's off, the completion popup shows an Add to Mem Mode toggle so you can add a line on the spot
Practice badges: Earn achievement medals for practising a line 5× or 10× in a session, or acing 5 lines in a row first-try
Display name: Settings → Account → Leaderboard lets you set the name shown on the leaderboard and in your account (or leave it blank to use your email name)
Suggest an improvement: Settings → Account now has a feedback button that emails the team directly
Getting Started
Open the sidebar: Tap the menu button (top left) to browse openings — the sidebar lists Favorites, Collections, Openings, Traps, and Mem Mode
Search openings: Type in the search box at the top of the sidebar to filter — the × button on the right clears the search and dismisses the keyboard
Choose an opening: Tap any row to load it on the board
Pick your colour: Tap Play White or Play Black below the board to start practising
Signing In
Sign in is optional but recommended — it syncs your progress, memorised lines, badges, and Mem Mode schedule across devices. Sign in from Settings → Account using Apple, Google, or email. You can sign out and use the app anonymously at any time.
Free and Premium
ChessMem is free to use with a daily practice limit. Premium removes the cap and unlocks the deeper features.
Free: 5 practice sessions per day across all openings. Explore mode, AI Explain previews, badges, and Mem Mode are included
Premium: Unlimited daily practice, full Game Analysis reports, full AI Explain on every position
How to upgrade: Tap any locked feature or open Settings → Account → Upgrade. Current pricing is shown in the upgrade screen
Manage or cancel: iOS — Settings app → Apple ID → Subscriptions. Web — Settings → Account → Manage Subscription
Sidebar Views
There are two ways to browse openings in the sidebar — switch between them in Settings → Preferences → Sidebar → Style.
Roller Picker (default): Just click on an opening to start cycling through the lines and variations.
Dropdown List: Each section expands into a full list of openings with their variations underneath. Better when you want to jump straight to a specific variation by name.
Depth (Basic / Medium / Full)
The Depth selector at the top of the sidebar controls how much theory each opening exposes:
Basic — only the most-played core lines. Quick to learn, perfect for beginners.
Medium — main theory plus the most common deviations.
Full — the complete database, every variation. For serious repertoire building.
How lines are ranked: by how often they're played in public online games — so you focus on the openings you're most likely to actually face in your own games, rather than rarely-seen theory.
Collections
Collections group openings into learning paths. Master one opening for White, and responses to both 1.e4 and 1.d4 as Black.
Style: Solid, Aggressive, Classical, Creative
Foundational 1, 2, 3: Progressive learning path
Practice Mode
Select an opening from the sidebar
Drag pieces, or tap a piece then its destination square
Correct moves play instantly; wrong moves show the right answer
Score 100% on a variation to memorise it — it'll come back via Mem Mode
Use Hint if you get stuck
Add a note: When you complete a variation, the completion popup has a notes field — jot down key ideas, traps, or plans. Notes are attached to the variation and shown next time you practise it
Explore Mode
Explore: Tap to freely move pieces and experiment with positions
Navigation arrows: Step forward/backward through moves
AI Explain (Predict the Next Move): Pause at any position and have the AI guess what comes next based on the position itself, then explain why. Useful for testing your own intuition before peeking at the theory
Progress Tracking
Progress fill: Each opening in the picker wheel fills with green based on how many variations you've memorised
100% fill means every variation in that opening is complete
Progress shows on all pickers: Openings, Favorites, Collections, and Traps
Reset an opening: Settings → Account → Data → Reset memorised opening lets you pick a single opening and wipe its scores, Mem Mode tracking, and badge. Useful when you want a fresh attempt at a line you've already memorised
Game Analysis Reports
Generate a personalised report from your recent Chess.com games. Found under Settings → Account → Game Analysis.
What's analysed: Lifetime stats use ~6 months of games; the opening breakdown narrows to your last 90 days so the recommendations reflect what you're actually playing now
Cadence: One report per month. The next one is available 30 days after the last
Free preview, Premium full: Free users see a summary; Premium unlocks the full PDF report including the move-by-move opening breakdown
Mem Mode (Spaced Repetition)
Lines you score 100% on enter Mem Mode, which uses spaced repetition to help you retain them long-term. Reviews come back at increasing intervals so you practise just before you'd forget.
How intervals work: First review ~1 day after mastery, then ~3 days, ~7, ~14, ~30, ~60, ~120 — each successful review pushes the next one further out
First-attempt matters: If you get 100% on your first try, the review interval advances normally. If you needed retries, the line comes back sooner — it means the memory isn't solid yet
Retries still count: Your score and badge are saved either way. Only the review schedule is affected
Daily review limit: Settings → Preferences → Mem Mode caps how many reviews are served per opening each day (default: All). Capped lines stay due and come back next session — the schedule itself is untouched
Auto-add: By default, lines you complete at 100% (any attempt) are added automatically. Turn it off in the same settings to curate manually — then the completion popup shows an Add to Mem Mode toggle
Swipe left on a Mem Mode opening to stop tracking it
Favorites
Add manually: Long-press an opening name, or tap the ☆ button
Remove: Swipe left on a favorite, or tap ⭐ to toggle off
Badges
How to earn: Memorise every line in an opening — the badge is yours permanently
Achievement medals: Practising a line 5× or 10× in one session, or acing 5 lines in a row first-try, also earns medals. These are just for fun — they don't affect your leaderboard ranking, which counts openings mastered
Where to see them: Settings → Account → Badges (visible by default — tap the heading to collapse or expand)
Leaderboard gold: Badges turn gold when you're #1 on the leaderboard
Tips and Shortcuts
Skip variation: Double-tap the ⏭ (last) button to jump to the next variation
Resume after reviewing: Tap any piece while viewing move history to return to the current position and continue playing
Long-press the opening name to add/remove from favorites
Swipe left on a favorite to remove it
Flip Board: Switch perspective at any time
Reset: Start the current variation from the beginning