Chessou

3 Nov 2026

Every pattern, rechecked

This month was all about accuracy. Every pattern behind your puzzles got an overhaul, and every repertoire was checked line by line.

Sharper comments and puzzles

  • From forks and pins to sacrifices and mates, every pattern behind your puzzles was checked one by one.
  • Every sacrifice is now recalculated in the background with a much deeper search before it's praised or turned into a puzzle.
  • New: a "Damage Control" drill and a "Defensive Tactics" theme.

Game review

  • Your game review comments are a lot better now, thanks to the reworked patterns. That goes for your older games too.
  • The new "Show follow-up" shows how the position plays out, and side lines get better comments.
  • On desktop, hover over a piece in a comment and it lights up on the board.

Puzzles

  • Cleaner puzzles: one clear solution, and they end right when the idea pays off.
  • Solved it? If the move you played in the game lost something, a new button shows you why.

Every repertoire, rechecked

  • Every line in all 78 repertoires got a second look. Moves only an engine would find were swapped for natural ones that hold up just as well.
  • Lines that reach the same position by a different move order are now marked, and hidden unless you want them.
  • Already learning one? Your copy has the new lines, and lines that didn't change keep your progress.

And a few more things

  • There's a new right-click menu, and it changes depending on where you are: hints in puzzles, takebacks in games, and more.
  • Plus around 45 smaller fixes, many of them from things you reported.

To everyone who was part of the closed beta: thank you very much. You tried new features first, reported the bugs you ran into, and plenty of your ideas are in the app now. Chessou is a lot better because of it.