X-Sudoku (Diagonal Sudoku)
Play X-Sudoku (Diagonal Sudoku) free online. Standard Sudoku plus both main diagonals must contain 1-9 exactly once. 27 hand-crafted levels across six tiers.
Source: GameZipper · Games hosted by GameZipper / PlayKovo
About this game
Play X-Sudoku (Diagonal Sudoku) free online. Standard Sudoku plus both main diagonals must contain 1-9 exactly once. 27 hand-crafted levels across six tiers.
How to play
What is X-Sudoku?
X-Sudoku (also called Diagonal Sudoku) is a Sudoku variant where, in addition to the standard row, column, and box rules, BOTH main diagonals of the grid must also contain every digit from 1 to N exactly once. The two diagonals form an X shape across the board.
How do I play X-Sudoku?
Tap an empty cell to select it, then tap a digit on the number pad to place it. Every row, column, box, and both main diagonals must contain each digit exactly once. Use Notes mode to pencil in candidate digits, and Hint to reveal a correct cell.
Is X-Sudoku free?
Yes. X-Sudoku on GameZipper is 100% free to play in your browser. No download, no sign-up, and no ads interrupt your puzzle solving.
How many levels does X-Sudoku have?
There are 27 hand-crafted levels across six tiers: Beginner (4x4), Easy and Medium (6x6), and Hard, Expert and Master (9x9). Each puzzle has a unique solution verified by a solver.