Also known as "Tatami", the traditional Japanese flooring composed by rectangular panels placed side by side
The scheme is composed from panels ot the same size (3,4,5...).
In every panel it is necessary to insert the numbers without repeating them.
Same numbers can touch only in diagonal.
Besides for every line and column the numbers must be repeated in equal way. Example, if the panel is of dimension 3 and the size of the grid is 9 every number must be repeated 3 times.