You need to draw borders so that the grid is divided into regions where the number of cells in each region equals the number written inside it and does not exceed nine. A region may contain one, several, or no numbers at all — all are valid. If there is no number, the size of the region is determined automatically by the number of cells. Regions of the same size cannot touch by sides, but may touch at corners. The goal is to correctly divide the entire grid into such regions. Depending on the Fillomino variant, additional restrictions may apply, such as the appearance of blocks, which can significantly affect the solving algorithm.
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