Sudoku, hexadoku and chaos sudoku solver online.

sudoku-puzzles-online.com helps you solve and play all the 9x9 and 16x16 sudoku puzzles that you set yourself, as well as many pre-set puzzles on the site.
You can also use this solver to help you create and check your own 9x9 and 16x16 sudoku puzzles...

The site also offers:

 • 80,000 free 9x9 irregular sudoku grids, called "chaos sudoku", to print, download in pdf format and play online.
 • 6,000 irregular jigsaw 16x16 sudoku puzzles to print and download in pdf.

 • 60,000 free sudoku puzzles of 25x25 squares to print, download in pdf format, and play online, called "alphadoku".

 • 60,000 free special samurai sudoku puzzles, made up of 4 interlaced 9x9 Sudokus, to print, download in pdf format and play online.

 • 60,000 free Samurai sudoku puzzles, made up of 5 interlaced 9x9 Sudokus, to print online.

 • Many 4x4 sudoku puzzles for kids to print.

What can our solvers do at once at your request?
 • View all the candidates marked for all the squares in the grid you are playing.
 • Solve a grid with the candidates entered by you or automatically.
 • Give you the full resolution of the grid in progress, specifying whether the solution is unique or not.
 • Solve the squares one by one.
 • Identify the next square to find.
 • Check the consistency and soundness of the grid project without giving you the solution.
 • Allow you to print your grid at any time
 • Save the grid in progress
 • Reload the grid and resume previously saved game.

Help:
The page General help summarizes the four basic methods for finding the solution for one square.

Programming:
If you would like to receive advice on the Sudoku program, you can send us your question. The team of sudoku-puzzles-online will respond.

Contact:
You can help us improve this site by sending us your comments or suggestions.

Acknowledgements:
The team of sudoku-puzzles-online thank all Internet users who have sent their suggestions.