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
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.
Appearances in the past WPCs
Listed here are appearances of classic to almost-classic Fillominoes. For variants, see list of Fillomino variants#Appearances in the past WPCs.
- WPC 2019/Round 1 (Coded) by Christoph Seeliger
- WPC 2019/Round 11 (3D) by Ulrich Voigt
- WPC 2019/World Cup Round 1 by Roland Voigt
- WPC 2019/Team Playoffs by Roland Voigt
- WPC 2019/World Cup Playoffs by Gabi Penn-Karras
- WPC 2017/Round 14 by Prasanna Seshadri and Amit Sowani
- WPC 2016/Round 9 by Matej Uher and Matúš Demiger
- WPC 2016/Round 13 (Unusual Partition) by Matúš Demiger
- WPC 2016/Team Playoffs (part of combination puzzle) by Matej Uher
- WPC 2015/Round 1 (Cylindrical) by Andrey Bogdanov
- WPC 2014/Round 1
- WPC 2014/Round 14
- WPC 2013/Part 5 (Liar)
- WPC 2013/Part 7
- WPC 2013/Part 14