Fill in the 9x9 grid so that each column, row and box contains numbers from 1 to 9.
Use the hint button if you get stuck by selecting the square you need help on and click "Use Hint" to fill in the correct digit. Only 3 hints per level. Can you get through all 75 levels?
Brain Snack :
"The grand aim of all science is to cover the greatest number of empirical facts by logical deduction from the smallest number of hypotheses or axioms"
-- Albert Einstein 1879-1955
