Samurai Sudoku: Rules and Explanatory Diagrams

A Samurai Sudoku is a variation of the classic Sudoku made up of five 9x9 grids.
These grids partially overlap and share some cells.

1. Each grid must follow the classic Sudoku rules:

     - fill each empty cell with a number between 1 and 9.

     - each row, column, and block (3x3 box) must contain each number from 1 to 9 exactly once.

2. Cells shared by multiple grids must simultaneously follow the rules of all the grids they belong to.


Rows

Example of rows in a Samurai Sudoku

Columns

Example of columns in a Samurai Sudoku

Blocks (3x3 boxes)

Example of blocks (3x3 boxes) in a Samurai Sudoku