Please use logical thinking instead of guessing! Each puzzle only has one solution.

In pen mode, you can directly import the candidate number by using Shift + number (Alt + number).
In pencil mode, you can directly import numbers by using Shift + number (Alt + number).
Key C (or Del, BackSpace): to deselect the number of the lattice or the candidate number.
Key ESC: to deselect.
Key P: a toggle switch to change from pencil and pen mode.

Jigsaw Diagonal Sudoku

Jigsaw diagonal Sudoku is also referred to Jigsaw X Sudoku. It is another type of standard Sudoku. Based on Jigsaw Sudoku, Jigsaw Diagonal Sudoku adds another two diagonal lines. Numbers on each diagonal line cannot be repetitive. Jigsaw diagonal Sudoku puzzles on Sudoku.cool have seven sizes of 4x4,5x5,6x6,7x7,8x8,9x9 with ten difficulty levels. By pressing “New Puzzle...”, you can choose game size and difficulty level.

You can learn more details about online game operation by referring to instruction of Newdoku .

Printable Irregular Diagonal Sudoku Puzzles (Daily update)

This website will provide you printable irregular diagonal sudoku puzzles, we daily update including solutions. We recommend using a A4 paper.

4X4 Irregular Diagonal Sudoku Puzzles Level:1 Level:2 Level:3 Level:4

5X5 Irregular Diagonal Sudoku Puzzles Level:1 Level:2 Level:3 Level:4 Level:5 Level:6 Level:7 Level:8 Level:9 Level:10

6X6 Irregular Diagonal Sudoku Puzzles Level:1 Level:2 Level:3 Level:4 Level:5 Level:6 Level:7 Level:8 Level:9 Level:10

7X7 Irregular Diagonal Sudoku Puzzles Level:1 Level:2 Level:3 Level:4 Level:5 Level:6 Level:7 Level:8 Level:9 Level:10

8X8 Irregular Diagonal Sudoku Puzzles Level:1 Level:2 Level:3 Level:4 Level:5 Level:6 Level:7 Level:8 Level:9 Level:10

9X9 Irregular Diagonal Sudoku Puzzles Level:1 Level:2 Level:3 Level:4 Level:5 Level:6 Level:7 Level:8 Level:9 Level:10

Sudoku

Super Killer Sudoku

X-Sudoku

Jigsaw Sudoku

Jigsaw X Sudoku

Mini Sudoku

Download Sudoku

Newdoku

Try 2048

Today's Sudoku

Samurai Sudoku