This is an example of a finished Samurai Sudoku puzzle. It consists of 5 inter-linked standard Sudoku
grids. The four 3x3 regions that appear in two separate grids need to satisfy the rules for both grids
at the same time.
The best way to approach a Samurai Sudoku grid is to tackle each sub-Sudoku independently, and only as
you get towards the end of the puzzle will you find that you need to take in to account that some cells
appear in two Sudoku grids.