This puzzle appears to be a Nikoli original.
Puzzle and Goal
An unsolved puzzle consists of a rectangular grid with numbers placed in it.
The goal is to create regions such that each cell is contained in one region.
The solved grid must satisfy the following conditions:
Each number <em>n</em> is contained in a region consisting of <em>n</em> cells.
No two orthogonally neighboring regions can contain the same number of cells.
Each region must containing at least one number, but can contain more.
In Trinudo, numbers are limited to 1 to 3.
Allied Occupation; Filling; Nikoji; Trinudo