Get the only solution to the puzzles by thinking logically without guessing.

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Get the only solution to the newdoku puzzles by thinking logically without guessing.

# Diagonal Sudoku (X Sudoku)

Diagonal Sudoku (X Sudoku) are like regular Sudoku puzzles but with two extra groups. Not only do you have to put the digits from 1 to 9 in each cell of each row, column, and 3×3 square, but you also do that for the two diagonals.

## How to play X Sudoku (Diagonal Sudoku)

• Fill the grid so that the numbers 1 through 9 appear in each row.
• Fill the grid so that the numbers 1 through 9 appear in each column.
• Fill the grid so that the numbers 1 through 9 appear in each 3x3 box.
• Fill the grid so that the numbers 1 through 9 appear in each main diagonal.

## Quick help

• Each step is saved automatically. If you feel you've made a mistake, click on the "Undo" or "Redo" to return to a certain step and continue. If you click on the "Reset", it will clear all the saved steps and start from the beginning.

• "Reset" icon: this will clear all input (pen and pencil marks) displayed in the grid.

• The game is auto-saved on exit, so you can come back to continue.

• "Pen" mode: You can click on the "Pen" icon to switch between pen and pencil modes.

"Pencil" mode: jot down ideas you have for possible keys. You can click on the "Pencil" icon to switch between pen and pencil modes.