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A Stairstep Sudoku is solved just like a Sudoku by filling the numbers from 1 to 9 into the blank cells. The only difference are the irregular shaped regions.
You can download and print Stairstep Sudokus at Print Stairstep Sudoku for free. Or if you need help or further instruction you can read the online Manual or for questions about Stairstep Sudoku What is Stairstep Sudoku.