This page features hard sudoku puzzles for beginners eager to challenge yourselves. You can enjoy daily sudoku problems and sudoku puzzles hard printable grids. Hard Sudoku Puzzles – Test Your Logical Thinking If you’re ready to push your Sudoku skills further, Hard Sudoku puzzles will challenge your logical thinking. These puzzles offer fewer clues, making it necessary to analyze multiple possibilities before placing numbers. Unlike easier levels, straightforward scanning won’t be enough—you’ll need to spot patterns and think a few moves ahead. Hard Sudoku is perfect for players looking to refine their technique and develop a deeper ... Play unlimited sudoku puzzles online. Four levels from Easy to Evil. Compatible with all browsers, tablets and phones including iPhone, iPad and Android. What are hard sudoku puzzles ? Hard sudoku puzzles are reserved for experienced players who have perfectly mastered the basic solving techniques learned with easy and medium sudokus. To be completed, you will need to learn and use the advanced sudoku solving techniques. There are five : X-Wing, XY-Wing, simple colouring, swordfish and XYZ-Wing.