About ajedrez.dev
Masters are made through repetition
At the heart of chess improvement lies pattern recognition. The more positions your brain has seen and internalized, the better your instincts become. ajedrez.dev is built around that idea, giving you a focused, efficient way to drill the patterns that actually matter for your game.
The most effective use of your training time is to work on what you are missing. And the clearest window into that is your own games.
That starts with taking responsibility. Instead of blaming luck or time trouble, face the positions where you went wrong and master them. Owning your mistakes is how real improvement happens.
Repetition makes the master
Spaced repetition brings each position back before you forget it. A puzzle counts as fixed once you've solved it cleanly twice, each time after two weeks or more away.
Train on your weak spots
Your games reveal exactly which patterns you are missing: not generic ones, but the ones that cost you points. Import them from Lichess or Chess.com and every mistake becomes a puzzle.
The whole game
Openings for your repertoire, puzzles for the middlegame, and endgames still to come. One account for all of them.
Your data stays yours
No email address, no real name. See exactly what we store.
A tool, not a complete training plan
ajedrez.dev is designed to make one dimension of chess training as effective as possible. It is not a replacement for a complete study routine. To keep improving, complement it with:
- Deep calculation and tactical puzzles
- Opening preparation
- Endgame theory study
- Annotated master games
- Long time control games
Why “Never Again”?
In Breaking Bad, Gus Fring gives Walter White a piece of advice that stuck with me: never make the same mistake twice.
In chess, the difference between losing and improving is remembering. Never Again is the promise you make to yourself after a painful game. We just help you keep it.