# Fillodoku

## Background

Fillodoku is a fusion of Fillomino and Sudoku.

## Puzzle and Goal

An unsolved puzzle consists of a square grid divided into rectangular regions. Some cells have numbers in them.

The goal is to fill some of the cells with numerals. Some cells may be empty.

## Rules

The solved grid must satisfy the following conditions:

Each number n appears n times in each row, column, and region.

In each region, the numbers n form an orthogonally contiguous area.

## Playable Online