NL

Every move is possible.

Start trainingPupil Frenzy

Your move

A puzzle from a game played on Lichess.

Puzzle 1

Easy

Black moves first.

Black to move

Play your move on the board. The eye tells you whether it's the right one, and if not, what goes wrong.

Then take the next puzzle, or play on against the computer.

From the free Lichess puzzle database.

Saturday

October 31, 2026What's on the board today

Today's puzzleSat, Oct 31White to move · Mate in 2 · MiddlegameSolve it
Pupil FrenzyAs many puzzles as you can in five minutes.Start a round
Play the computerYou choose how strong the computer plays. When a move matters, the trainer tells you why.Start a game

Your games

From Lichess, Chess.com, or a PGN fileanalyzed in your browser

Find the mistakes you keep making

  1. Bring them in

    Enter your Lichess or Chess.com username and choose 25, 50, or 100 games. A PGN file works too.

  2. Let the computer check them

    The computer analyzes your games in your own browser. On a fast PC, 50 games take about half a minute; on a phone, longer.

  3. Practice what you find

    You practice with positions from your own games. Miss the better move and the position comes back after 1, 3, and 7 days.

Get your gamesOr play a game against the computer first

What the eye looks for

Your overview counts how often each mistake happens, and in which phase of the game.

  • Piece left hanging
  • Walked into a fork
  • Pin
  • Missed mate
  • Walked into mate
  • Missed material
  • Advantage not converted
  • Time trouble

Opening · Middlegame · Endgame

Openings

11 openings to practice

All openings

See you tomorrow

A new puzzle is waiting tomorrow