How the puzzles work
Each puzzle comes from a real game. The opponent's last move is played for you, then it is your turn: find the best move, and keep going until the line is finished. Any checkmate counts, even if it differs from the stored solution.
Solve a puzzle without hints for a point and a longer streak. Your puzzle rating goes up when you solve harder puzzles and down when you miss, so it settles near your real level. Everything is saved in this browser only.
The 2800 puzzles come from the free Lichess puzzle database, where thousands of players have rated each one.
Questions
Are the puzzles free?
Yes, all of them, with no account and no daily limit.
What does "mate in 2" mean?
You can force checkmate in two of your own moves, whatever the opponent does in between.
Which level should I start with?
Easy if you are new to chess (puzzles rated 400-1200), Medium if you play casually, Hard and Expert for club players and above.