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 …

3 days ago · LiveSudoku is home to all Sudoku players around the world from easy and medium sudokus to hard and evil sudoku levels. You can invite a fellow Sudokuer for a match of speed and …

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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 200 free Hard Sudoku puzzles online. Interactive player with timer, pencil marks, hints, and printable PDFs.

This page features hard sudoku puzzles for beginners eager to challenge yourselves. You can enjoy daily sudoku problems and sudoku puzzles hard printable grids.

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