Suko

Play Suko, the world's most delightful number-placement puzzle. Its compact design makes it ideal for playing on the go.
INSTRUCTIONS
Place the numbers 1 through 9 on the grid, so the numbers in squares surrounding each inner circle sum to the number in that circle, and the numbers in squares of each shade sum to the number in the outer circle of that shade.
If you get stuck, hints come to the rescue. There's even a Cheat feature to crack any Suko code instantly!
KEY FEATURES
- Play unlimited Suko games
- Improve your logic skills and mental math
- Check your solutions
- Determine whether a puzzle is solvable
- And more!