Follow this link to get 20 free sudokus, these are hard so hopefully should give you a challenge
If that taster has whetted your appetite we also have 1000 Hard Sudokus for only $2
An excellent and fun resource for kids and adults! Hours of entertaining activity.
This is 1000 Hard Sudoku puzzles VOLUME 1- All new collection of Sudoku puzzles.
1000 Hard Sudoku Puzzles & Solutions
Large Standard 8.5″ x 11″ pages
– Print at actual size (8.5″ x 11″ | US Letter) – Recommended
– You choose the type, weight and size of paper – Print as many copies as you like
– 8.5″ x 11″
5 x ZIP File (5 x 200 Hard Sudoku Puzzles PDF & 5 x 200 Hard Sudoku Solutions PDF)