
E.g. red will have a bonus of 10 armies, since 10 of his owned tiles belongs to a sudoku set.
E.g. yellow will have 17 bonus armies, since 5 tiles belong to 1 sudoku set and 6 tiles belong to 2 sudoku sets (5+2*6=17)
The interesting part would be the cooperation with other players. If this is not possible, i.e. no cooperation is to be expected, it's not worth pursuing this idea. Please vote or write what you think of this idea.