Let's find your games.

What happens next

What a review gives you

Cortex finds the moves where your game actually changed — usually two or three, and usually not the one you feel worst about. It puts the better move on the board next to the one you played, explains what that move does, and explains what you'd have needed to notice to find it yourself. Not an arrow and a number. Sentences you can take into your next game.

We only need your username

Chess.com and Lichess both publish game archives publicly, and Cortex reads yours the same way anyone can. There's no password to hand over, nothing to connect, and no permission screen to approve. If you get your handle wrong, nothing happens — try it again.

Your last fifty games come across

Reaching back up to a year: rapid, daily and classical — the games you had time to think in, which are the ones with decisions worth explaining. Bullet and blitz aren't imported, so if fast chess is most of what you play, start with the slower games you have.

Games you played over the board count too

Club nights and tournaments never touch Chess.com, so you add those yourself — either play the moves onto a board in the app or paste the PGN. They get reviewed exactly the same way your online games do, which is the part most tools can't do at all. Those are usually your longest and most serious games.

Then it starts on its own

Cortex finds your most recent loss and begins reviewing it while you add an email and a password. You land straight in that review with it already running, rather than staring at an empty account wondering what to do first.

It costs nothing to find out

Three game reviews a day, free, for as long as you play. No card, no trial clock counting down, and nothing switches off at the end of a first week.