New every day at midnight
Daily Thermometer Puzzle
One puzzle a day in each size, the same for every player. Solve it to keep your streak going, then share your time with friends.
How the daily puzzle works
- One puzzle per size, per day. Today's puzzles are generated from today's date, so everyone in your time zone sees the same grids.
- Streaks. Solve at least one daily puzzle each day to build your streak. Your best streak appears under Stats.
- Climb the ladder. After solving, Next puzzle takes you to today's next size up, from 4×4 all the way to 15×15.
- Private by design. Streaks and times are stored only in your browser. There's no account to create.
Want more after today's puzzle? Switch to endless mode for unlimited puzzles, or print a batch for later.