About the game
Picture a crossword where the clues are sums. The board is full of equations with holes in them, and a panel of loose numbers waits beside it. Plus, minus, times and divide all appear.
Here is where it bites: a number that fixes one row can wreck the column running through it. Every board has a single correct answer, so lucky near-misses will not save you. Early levels are small and gentle, later ones sprawl. A daily puzzle keeps a streak going, and there are speed points, a leaderboard, achievements and a dark theme if your eyes need it.
How to play
- Pick a number from the panel and slide it onto a blank cell, or touch the number and then the cell. Touch a placed number to pull it back out.
- Green means that equation works, red means it does not. Clear the level by turning every equation green.
- Stuck? The light bulb drops in one right number for you, but quick runs with no hints earn the most points.
- Begin at the spots where two equations meet. They allow the fewest answers.
- Free
- No download
- Works on phones
















