Engine analysis on every position
Powered by Stockfish. See not just the winning move but why the alternatives fail — the part that turns a solved puzzle into a pattern you actually keep.
Free forever · No account needed to start
Sharpen the move
Sharpen the move
you didn't see.
Tactics decide most games. Train them properly — puzzles rated to your level, weak spots resurfaced automatically, every position backed by engine analysis.
- No paywalled puzzles
- Stockfish-backed analysis
- Ads never block the board
White to move
Solve it
- Puzzles in the library
- 6,100,960
- Tactical themes
- 62
- Engine analysis
- Stockfish
- Cost to train
- $0
Train with intent
All themes
Pick the pattern you keep missing
How training works
A loop that actually compounds
Most puzzle sites hand you a random position and move on. Here, every attempt feeds the next one.
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1
Solve at your level
Every puzzle carries an Elo rating. We serve positions just past your current edge — hard enough to teach, not so hard they're noise.
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2
Your rating adapts
Solve it and your rating rises; miss it and it dips. Difficulty tracks you automatically, so training never drifts too easy or too brutal.
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3
Misses come back
Anything you get wrong re-enters your queue on a spaced-repetition schedule — timed for right about when you'd start to forget it.
Everything included
Built for people who want to get better
Daily puzzle
One curated position a day, same for everyone.
Achievements & streaks
Badges for milestones, plus a global leaderboard.
Fast by design
Self-hosted fonts, no tracker bloat, instant boards.
Yours to configure
Light and dark themes, multiple board colours and piece sets, and a deliberately quiet solving screen that keeps the board as the only thing competing for your attention.
Your next rating point is one pattern away
Create a free account to keep your rating, streak, and review queue. Or just start solving — no signup required.