Gradatio · Free in your browser
Futoshiki: Gradatio
Futoshiki: a Latin square with signs between the cells.
The rules
- Fill every cell with a number from 1 up to the board's size, following the rules below.
- Every puzzle here can be worked out step by step.
- Got it
- No repeats in a line: every number appears exactly once in each row and each column.
- Follow the signs: the point of a sign faces the smaller number — 2 < 3, and the same up and down.
- Fill every cell: a finished board has no empty cells left.
- Tap a cell to select it, then tap a number below the board to fill it in.
How to play here
Three ways to play
Campaign
Chapters that start gently and bring in one new idea at a time.
Daily puzzle
A new board every day, the same for everyone. Solve every one in a month and that month's trophy is yours.
Endless
Keep going as long as you like, in Easy, Medium, Hard and Expert.
Common questions
Is Gradatio free?
Yes. You can play here without paying and without an account. Ads keep the lights on.
Where is my progress saved?
In this browser, on this device. If you clear the site data, your progress goes with it. A free Solvarium account keeps it safe.
Does it work on a phone or tablet?
Yes. It runs in any current browser on phones, tablets and computers, and the board resizes to fit the screen.
Does every puzzle really have one solution?
Yes. Every board goes through a solver before it ships, and anything with more than one solution is thrown out.