To solve a Sudoku puzzle, every number from 1 to 9 must appear in:
Each of the nine vertical columns
Each of the nine horizontal rows
Each of the nine 3 x 3 blocks
Remember no number can occur more than once in any row, column or 3x3 block.
To solve a Sudoku puzzle, every number from 1 to 9 must appear in:
Each of the nine vertical columns
Each of the nine horizontal rows
Each of the nine 3 x 3 blocks
Remember no number can occur more than once in any row, column or 3x3 block.