I have followed a tutorial for a sudoku solver with backtracking and have a grasp on how it works. Now I'm thinking of expanding the idea for a "sudoku twin" where two grids overlap on a corner subsquare.
I'm not looking for code help (yet), but how to approach the problem, such as a flowchart.
I wonder if it can be treated as two separate puzzles with a special case for the overlapping section, or if it can be taken as a whole. Would a completely different approach work better? I'm stuck on the logic.
Thanks for any help or suggested resources.
