Fillomino
A group of 3s must cover three cells. A 1 sits alone. That one rule drives Fillomino, a classic pencil puzzle you can play free here with a new board each day.
Fillomino rules in short
- Keep the given numbers
Darker cells hold fixed clue numbers that you cannot change.
- Arm a number
Tap a number in the toolbar so it stays highlighted, then tap empty cells to paint that value.
- Size each group
Every connected group of one number must contain exactly that many cells.
- Keep groups apart
Two separate groups of the same number may not share a side. Touching at a corner is fine.
Fillomino at a glance
- Puzzle type
- Fillomino, a Nikoli pencil puzzle
- Grid sizes
- Nine, from 8 by 8 to 16 by 16
- Levels
- Three difficulty levels
- New puzzle
- One daily puzzle
- Extras
- Rules guide and printable puzzles
- Category
- Logic and mystery games, logic boards
The rules at a glance
| Rule | Example |
|---|---|
| A group of n has n cells | Four 4s joined together |
| Same numbers may not touch by a side | Two groups of 2s need a gap between them |
| Corners do not count | A 1 can sit diagonal to another 1 |
Groups touching only at a corner are fine. Only shared sides count.
Picking a grid size
Start on 8 by 8 at the easy level to learn how groups close off. Bigger grids are not just longer, they need you to hold many groups in your head at once. Move up a size only when the small one feels quick. The daily puzzle is a good fixed test of how you are getting on.
Questions people ask about Fillomino
Do diagonal cells count as connected?
No. Only cells that share a side are connected, so diagonal touching is allowed.
Who invented Fillomino?
It is one of the classic puzzle types made popular by Nikoli, the Japanese publisher behind Sudoku and Kakuro.
Is there a daily puzzle?
Yes. Next to the free play grids, there is a new daily puzzle every day.
What are the Fillomino puzzle rules?
Each connected group of one number must have exactly that many cells, and two groups of the same number may not touch by a side.
Ways to get better at Fillomino
- Fill the 1s first. Any empty cell boxed in by finished groups is often a 1.
- If a clue of 4 already has four cells, close it off by putting other numbers around it.
- Two equal clues close together often belong to the same group. Check if they can join.
- Large clues near a corner have the fewest shapes, so solve them early.
- Try the smallest grid first to learn the Fillomino puzzle rules quickly.
Facts checked on 2026-11-09. Fillomino belongs to fillomino.app. Megadle is not linked to it.