Chalk
Nine games · 2643 puzzles · no account
Chalk
Nine little puzzles and board games. No sign up, no timers pushing you along.
Every puzzle is generated and then verified by computer to have exactly one solution. No guessing, no dead ends, no puzzle that turns out to be impossible halfway through.
Free to play. One payment removes the ads.
Nine games
Five puzzles to solve alone, four board games for two.
- Sudoku412 puzzles, 4x4 to the full 9x9
- Nonograms125 picross picture puzzles, 5x5 to 15x15
- Slitherlink125 loop the loop puzzles, 5x5 to 10x10
- Stitch515 puzzles, one line through every square
- Shikaku1466 puzzles, cut the grid into patches
- Tic Tac ToeThree in a row
- Four in a RowDrop and connect
- Dots and BoxesClaim the squares
- HexConnect your two sides
2643
Every puzzle checked
Each one is generated and then verified by computer to have exactly one solution. No guessing, no dead ends, and no puzzle that turns out to be impossible halfway through. Every one ships inside the app, so nothing needs a connection.
Two phones, no internet
Play a board game with the person next to you on their own phone. Chalk finds the other phone over the local network, or sends the moves as a short chirp through the speaker, which works between any two phones with no account, no pairing code and no connection at all. Or pass one phone between you, or play Chalk itself at one of three levels.
Nothing leaves your phone
There is no account and nothing to sign up for. Your progress, best times and settings are written to a file on your own device and never sent anywhere. The games work in a tunnel, on a plane, or with the wifi off.