Repertoire
Your openings, not a syllabus
Import your own games. It finds where you left your preparation and asks you about those positions — not a generic beginner line you'd never play.
Chess Chunker
In development · early access soon
All-in-one chess training · beginner to expert
Openings, endgames, courses and brain games. One trainer.
Chess Chunker is an all-in-one training suite of tools, courses, openings, endgames and brain games, for players from beginner through expert. The full suite is still being built. The brain games are free to play right now.
1.e4 e5 2.Nf3 Nc6 3.Bb5
is the Ruy Lopez
Bxh7+ Kxh7 Ng5+ Kg8 Qh5
is the Greek gift
Qd8+ Rxd8 Rxd8#
is the back rank
Free to play now
Brain games
Short games that each train one skill. No account and nothing to install. They run in your browser and remember your best scores on this device.
Mating patterns
Mate Shapes
A king is mated. Cover him and every square he could run to with the matching shape. 306 levels and an endless mode.
Play →
Board vision
Chess Survival
Move your piece to a square nobody attacks while the board fills up with enemies. Your piece changes every turn.
Play →
Pattern spotting
Spot the King
One king hidden among sixty-four pieces. Find it before the clock runs out, and the clock gets shorter every time you do.
Play →
Speed of sight
Blink
Positions flash past. Press the moment one is checkmate. It measures how long you stay blind right after spotting one.
Play →More games are on the way as they're ready.
What it is
Four things, built to work as one.
Most trainers do one of these and call it a course. The point of putting them in one place is that what you get wrong in a real game decides what you're asked tomorrow.
Memory
Spaced repetition that knows chess
Cards are keyed to the position, not the move order, so a line you reach a different way still counts. Scheduled with FSRS-6.
Endgames
Perfect play to argue with
Endgame drills judged against tablebases — the moves that hold and the moves that throw it away, with the reason attached rather than a score.
Skills
Games that train one thing
Short drills aimed at a single skill — board vision, calculation, pattern recall, playing fast under pressure — the way a gym separates the movements.
Early access
The full suite isn't open yet. Get told when it is.
There's no launch date yet. When it opens, the people on this list get in first.