How it works
Learn it once. Keep it for good.
Your mistakes become a spaced-repetition course: you see each idea again just as you're about to forget it, so it sticks.
- 1
Your games become position puzzles
Every mistake you make turns into a puzzle to solve.
- 2
The coach picks a skill
It ranks your habits and trains the one costing you most.
- 3
You practise, spaced out
15 positions a day. Solve one and it waits longer before it comes back.
- 4
It sticks
Mastered when it reaches the last box and the mistake fades from your games.
Every mistake is a pawn. Push it to promotion.
Solve it and it steps forward, and comes back a little later each time. Miss it and it goes back to the start. Reach the last rank and it promotes: you've mastered it.
Today
Tomorrow
3 days
1 week
2 weeks
1 month
Mastered
A new mistake from your games starts here.
Review a mistake once and it's gone in days. Review it at the right moments and it stays.
Why it beats the usual ways to study
| Videos & books | Playing more | One game review | Coach Knight | |
|---|---|---|---|---|
| Works on your mistakes | ✗ | ✗ | ✓ | ✓ |
| Finds the habit that costs you most | ✗ | ✗ | ✗ | ✓ |
| Brings it back before you forget | ✗ | ✗ | ✗ | ✓ |
| Tracks if it's fading from your games | ✗ | ✗ | ✗ | ✓ |
Spaced review is one of the most tested ideas in learning research, from Ebbinghaus in 1885 to a 2006 review of 317 experiments (Cepeda et al.).
