With this type of Sukoku's the relationships between the various positions in the Sudoku are known. In this context, relations means whether a number is smaller or larger than its 'neighbor' to the left, right, bottom or top.

If you download the Explanation below, you can study the description of this Sudoku variant further.

Download the Explanation

Download the Relation Sudokus (including solution):

1. Horizontal relations
2. Horizontal and vertical relations
3. 50% relations