The origin of this puzzle is not known.
Puzzle and Goal
An unsolved puzzle consists of a square grid containing some numbers. Some intersections also contain mathematical functions.
The goal is to create a Latin Square that satisfies the clues.
The solved grid must satisfy the following conditions:
Functions indicate the relationship between diagonal pairs of cells. For instance, "-2" indicates that the upper right and lower left cells will have a difference of two, and that the lower right and upper left cells will.