Your chess study
Replay your games, rehearse openings and practice tactics. Files are processed in this browser. No engine scores or account XP are generated.
Next-game mission: check the recapture
Before you capture, ask which opposing piece could take yours back. After the game, open its PGN or import it from Lichess, select your colour and choose Review selected game.
Capture habit journal
Before capturing, check what can take your piece back. Track this habit on this browser, or save it to your account to use it across devices.
Import games
Choose Chess.com, Lichess, or a PGN file.
Import from Chess.comImport from Lichess
Import PGN
Up to 20 standard games, 512 KiB total, 64 KiB per game and 1,200 half-moves total. Personal headers, comments and variations are removed from exports and saved replays.
Your saved study progress
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Opening repertoire practice
Rehearse a specific variation as White or Black. Other legal moves may be good chess; this exercise tests recall of your chosen line. Examples are original, short development lines.
Restoring saved study…
Save a variation to recover its position after refresh or an interrupted visit. Browser study stays on this device until you remove it. Avoid saving on a shared device.
Add your own variation
How spaced reviews work
Clean reviews due now return after 1, 3, 7, then 14 days. Early repeats do not accelerate the schedule. A missed or revealed move returns the line to a one-day review. Review dates and clean completions measure recall of this line, not playing strength.
Tactical puzzle practice
Practice original positions by theme and level. Levels describe curriculum grouping, not calibrated ratings. Any legal move that achieves the stated task is accepted.
0 completed attempts · 0 clean completions · 0 misses recorded · No accuracy measured yet
New puzzle progress lasts for this visit. Browser records stay on this device. Avoid saving on a shared device. These exercises award no account XP.
Restoring puzzle history…
Saved positions
Position bookmarks are saved only on this browser, without player names or game headers.
No positions saved yet. Open a PGN and choose “Save position on this browser.”
Offline exercises
Download public lessons, original puzzles, opening exercises and replay tools for use without a connection. Account services and private game pages require a connection. Downloading exercises does not save guest lesson progress.
No offline exercise download is confirmed. Browser storage can be evicted; export records you want to keep.
Your browser study data
Saved replays, in-progress openings, bookmarks and tactical history are separate from your account. Signing out or deleting an account does not remove them. Avoid saving on shared devices.
Restore a browser study backup
Move your study to another browser or recover an exported backup. Restore only into a browser with no saved study or saving settings. Existing records are never replaced. Files stay in this browser and are not uploaded.