Achievements

Fast-paced chess puzzles. Choose a game mode to get started.

Haste

Combos gain time. Mistakes lose time. New puzzles each run.

New puzzles each run

Three

Three minutes, three lives,
three hints

New puzzles each run

Countdown

Solve puzzles before time runs out. New level each day.

Next level in 3 hours

Speedrun

Solve a sequence of puzzles as quickly as you can.

Theme: Bishop Endgame

Infinity

Play through endless puzzles. Set your own difficulty.

Sign up to track your progress

Repetition

Quickly solve puzzles without mistakes to unlock the next level.

Level 1 — Just warming up
Past 7 days
Most infinity puzzles solved
Past 24 hours
Yesterday
Fastest speedruns
109.0s
137.8s
Unique puzzles solved
Today
Fastest speedruns
142.7s
Unique puzzles solved

Themed chess puzzle sets.

Combos gain time. Mistakes lose time. New puzzles each run.

Mate in one

Practice checkmate in one move. Great for beginners.

Rook endgames

The most common type of piece endgames.

Openings

Practice tactical patterns from chess openings.

Past 3 days
Mate in one high scores
Rook endgames high scores
Openings high scores
Site updates
Sep 22, 2025
You can now customize the pieces on your board
Sep 17, 2025
Game mode puzzles have been upgraded to use the latest Lichess puzzle database
Aug 17, 2025
After selecting a game mode, you can now resize the chessboard via the icon in the bottom-right corner.
May 23, 2021
You can now create and play custom puzzle sets. This feature is still early in development. Feedback is welcome!
Dec 19, 2020
You can now use right click to draw shapes on the board. Click to draw circles. Click and drag to draw arrows.
Dec 15, 2020
When you view puzzles after a haste round, puzzles you made mistakes on will now be clearly shown.
Dec 8, 2020
A new game mode (Three) is in beta. Have fun and let us know what you think!
Oct 7, 2020
Click the "view puzzles" button after a speedrun or haste round to view the puzzles you saw during the round.
Oct 1, 2020
If you forgot your password and signed up with an email, you can reset your password here.
Feb 26, 2019
Rated mode is now in beta. Expect a rating reset in the future after puzzle ratings stabilize and tweaks are made to the rating system. More features to come.
Feb 24, 2019
Turn sounds on/off using the volume icon in the header
Feb 21, 2019
Links