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 …

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

Play hard level sudoku puzzles for free at Sudoku Academy. Test your logic, master advanced techniques, and become a true sudoku strategist.

3 days ago · Learn how to solve hard sudoku, try our almost evil websudoku.

Play hard Sudoku puzzles online for free. Test your logic and strategy with challenging grids designed for experienced Sudoku solvers.

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

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

Our Hard level Sudoku puzzles usually contain around 25 - 35 given numbers and will require you to use techniques and special methods in order to complete the puzzles.

Play hard Sudoku Puzzles online for free. Hard level puzzles for experienced players. Play them and challenge yourself.

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, …