Diagonal Sudoku ✓ Solved
Hidden singles, including on the diagonals.
Getting your puzzle ready…
Keyboard shortcuts
- Arrow keys: move around the grid
- Number keys: enter a number
- Backspace or Delete: erase
- N: notes on/off
- Ctrl+Z / Ctrl+Y: undo / redo
- H: hint
Top players
All leaderboardsDiagonal Sudoku · Medium. Each player’s best score.
Loading the board…
How to play Diagonal Sudoku
- Each row, column and 3×3 box contains 1 to 9 once.
- Both long diagonals (corner to corner) also contain 1 to 9 once.
- Every puzzle has exactly one solution.
Full guide with an animated example · Strategy guides · Printable Diagonal Sudoku
About Diagonal Sudoku (also called Sudoku X)
Also called Sudoku X. The two long diagonals are shaded and follow the same rule as rows and columns, which gives you extra clues.
This page starts you on Medium. Choose another level above at any time; your game is saved after every move, so you can come back later, even offline.
Tips
- Check the diagonals early: they often hide a single.
- The center box touches both diagonals.