Rekuto is played on a rectangular or square grid. Some of the cells have numbers in them. The aim is to divide the grid into rectangular and square pieces such that each piece contains exactly one number, and that number represents the sum of the width and height of the rectangle.

Neighbours is played on a grid of irregular shape. Some cells of the grid contain numbers. It is necessary to divide the grid into a number of connected regions of an equal number of cells. Every region contains exactly one cell with a number (or a question mark) in it, and has as many neighbours as the number indicates. Regions are neighbours when they share a part of their border.