From WPC unofficial wiki


Divide the grid into several regions, so that regions of the same size do not share an edge (they may touch diagonally). Each number indicates the size of the region it is located in. Regions may contain none, one or several numbers.

(Rules and example from WPC 2019 IB)

History of the puzzle[edit]

First appeared on Nikoli volume 47 (1994) as a suggestion from すらんた ("Suranta"). Originally named フィルオミノ (Firuomino), where フィル ("fill") and オミノ ("-omino") both being a loan word from English.

The name is an allusion to the earlier puzzle type, フィルマット (Firumatto), invented in 1993. In this puzzle, the same rule of "same-sized regions don't touch each other" apply, but regions are limited to rectangles with a width of one cell.


See list of Fillomino variants.

Appearances in the past WPCs[edit]

Listed here are appearances of classic to almost-classic Fillominoes. For variants, see list of Fillomino variants#Appearances in the past WPCs.