Shikaku is a region based logic puzzle where the grid is divided up into smaller, rectangular regions.
The objective is to divide the whole grid into smaller regions, subject to the following rules:
- Upon completion each tile will be used exactly once, each containing exactly one number.
- The number in the region will be equal in value to the total of the tiles in that region.
- All regions must be rectangular.
A standard 10x10 shikaku and its solution.