Samurai Sudoku Puzzle Book for Adults - Hard

100 Hard Samurai Sudoku PuzzlesSamurai Sudoku consists of five overlapping Sudoku grids, one in the center and the other 4 overlapping each corner grid of the central one.
The object of the game is to place numbers 1 to 9 in the empty cells so that each row, each column, and 3x3 box in each 9x9 grid contains the same number only once.