Extreme Sudoku is the most challenging version of the 9x9 grid puzzle game for the real puzzle masters! It's not just about following the basic rules - you've got to be a puzzle-solving expert and use advanced strategies to crack it.

Try today's easier puzzle; moderately difficult or Word Soduku or Jigsaw Sudoku or Samurai Sudoku instead. Download the puzzle for solving with Sudoku Dragon on your PC.

Play hard level Sudoku online on Sudoku.com. Our daily difficult web sudoku puzzles are suitable for people, who possess an excellent knowledge of sudoku game and know how to build a proper strategy to get a right solution in short terms.

Expert Sudoku is a game for experienced Sudoku players with a very high level of difficulty. This hardest Sudoku puzzle is characterized by the fact that only a few numbers are shown in the Sudoku square, which consists of 9 small squares, where the cells are located 3x3.

Play free online (extremely hard) Sudoku puzzles on our featured Sudoku game interface. You can fill in candidates, highlight cells, undo or redo steps, check mistakes, and more, so that you can apply the logic to solve the puzzles more conveniently.

Play unlimited sudoku puzzles online. Four levels from Easy to Evil. Compatible with all browsers, tablets and phones including iPhone, iPad and Android.

Beautiful 24/7 Sudoku's Expert Sudoku is going to requre much more advanced technique to solve than in previous puzzles on the site. This advanced logic is only for the most seasoned sudoku players who enjoy long, extremely advanced games which employ a lot of outside the box sudoku thinking.

Play unlimited sudoku puzzles online. Five very difficult levels from Evil to Extreme. Each puzzle has a unique solution and can be solved with pure logic.

Play millions of extremely difficult sudoku boards and compete with other players. Free online sudoku!

Solve hard sudoku puzzles online, 100% free. Perfect for those good at sudoku and want an extra challenge.