filo.

The rules

1. 1

   Fill every cell with a number.

   Every blank square gets exactly one positive integer.

2. 2

   Same numbers, side by side, form a region.

   A region's size must equal its number — a region of 3s has exactly three cells; a region of 2s has exactly two.

   3

   3

   6

   2

   3

   6

   6

   2

   6

   6

   6

   1
3. 3

   Two regions of the same size can't touch.

   They must be separated by a cell of a different value — otherwise they'd just be one bigger region.

   2

   2

   2

   2

How to play it

• drag

  Fill — drag from any cell that has a number to paint neighbouring blanks with that same number.

• drag

  Erase — drag starting on a blank cell to clear any cells you cross.

• tap

  Tap a cell to open the number picker, where you can pick a value or clear it.

Solving with walls

On paper, you solve Fillomino by drawing walls. The moment you work out that two neighbours belong to different regions, you draw the line between them — and the regions take shape from those borders.

• 4

  4

  2

  3

  A wall goes on every seam between different numbers.

• 2

  2

  Two 2s with a gap between them can't share it — the gap can't be a 2, so wall it off from both.

• 4

  4

  4

  2

  3

  Walled in on every side but one? The region must grow into the gap that's left.

• 3

  3

  3

  Finished a region? Wall it all the way around — nothing beside it can share its number.

• drag

  Draw a wall — drag along the seam between two cells, corner to corner, to commit a border you've deduced.

• drag

  Erase a wall — drag back along a wall to rub it out.

• toggle

  Auto lines — draw the obvious walls for you and flag mistakes. Switch it off for a pure pencil-and-paper solve.

Stuck? Take a hint

• tap

  Hint — finds a cell you can already fill in. The easy ones it just fills; for a trickier step it walks you through the reasoning, highlighting the cells that force the answer so you learn the move, not just the number.