Grade 3
♜♞♝♛♚♝♞♜♟♟♟♟♟♟♟♟♟♟♟♟♟♟♟♟♜♞♝♛♚♝♞♜
The arena
Your Elo will climb.
Thirteen moves, all the way to mate. Watch it play out, then come and play your own.
FreeNo card neededFive minutes
The opening
Four moves, and the game is already committed.
The coach does not recite theory. It shows you what those four moves just gave you, or just cost you.
The middlegame
The engine never lies.
Stockfish calculates, the coach explains. Never the other way round: a coach that guesses teaches nobody anything.
The trap
The queen is offered. Black takes it.
It is the only mistake in the game, and it is enough. Your diagnostic looks for exactly those in your play.
The reckoning
Three minor pieces are enough.
Fifty-seven modules in the catalogue, four hundred and seventy-one positions, each replayed by the engine before publication.
Checkmate
Mate on the thirteenth move.
Légal de Kermeur, Paris, 1750. The same combination still lands today, at every level.
Your turn
Now play yours.
Five minutes of diagnostic, then a plan that follows your level week after week.
The programme
The catalogue, position by position.
Every tile comes from a real lesson. The position is engine-checked before it ships, and the move shown is the one you are asked to find. Hover a position: it zooms in and the move plays. On a touch screen, it plays as it scrolls past.
Grade 4
Going after the castled king
Grade 5
The queenside attack
Grade 5
Attacking the castled king
Grade 4
Attraction
Grade 4
Discovered check
Grade 4
Double check
Grade 3
The skewer
Grade 4
The prepared skewer
Grade 5
Interference
Grade 5
The opening beyond the principles
Grade 6
Active defence
Grade 1
The back rank
Grade 4
Deflection
Grade 2
The fork
Grade 4
The prepared fork
For real
Screenshots, not mock-ups.
These three images are taken by the visual review on a production build, then cropped. What you see here is what you get.
Inside the app
What you actually do, session after session.
The coach explains, then corrects you
It remembers your sessions. Miss the same motif twice and it changes angle instead of repeating itself.
You played Bxh7. The bishop drops: h7 is defended twice, you only attack it once. Count the defenders before you sacrifice.
What if I play Ng5 first?
Now it works. You add an attacker, it is two against two, and the sacrifice is on. Move order is what decides it.
Your level, as a number
An Elo estimate with its margin of error, updated after every exercise.
Estimated Elo
1284 ±38
Grade 3 · Knight
Your plan reorders itself
Whichever module costs you the most points moves to the top. The why always comes with a number.
01The pin−34 pts
02Hanging pieces−21 pts
03Back-rank mate−12 pts
The engine does not negotiate
Stockfish runs in your browser and evaluates every move, from 400 to 2300 Elo. The coach carries the teaching, never the calculation: when it claims a gain, the engine measured it.
Depth
22
Evaluation
+1.42
Best move
Cxd5
Elorise in numbers
8grades, from Pawn to Legend
62tactical themes covered
±40accuracy of the estimate
24/7your coach answers
The LLM coaches.
The engine plays.
The coach carries the teaching: the dialogue, the memory of your sessions, your plan. Stockfish carries the truth of the game: every move, every evaluation. Two specialists — never one standing in for the other.
Your first lesson is waiting.
Free diagnosis. In five minutes you will know where you stand — and what we start with.