Descriptions:
Want to challenge yourself with very difficult Sudoku puzzles? This site has plenty of them. The interface has the features that can help you to exercise some advanced solving techniques to solve the puzzles. It also provides an online blank grid so that you can play your own puzzles with their interface and the solutions of your puzzles will be ready for you to check your moves while playing. All puzzles are free and you just need to get online.
puzzles, sudoku