Sudoku - test yourself in lockdown!

The best fun with numbers!

There's also Codecracker and Crosswords to test yourself!

Sudoku is simple to learn but the challenges never end. These highly addictive puzzles only require a bit of logical thinking - no arithmetic!In any Sudoku puzzle each row, column and 3x3 box of nine squares must contain the numbers 1-9 with none of the numbers repeated in any row, column or 3x3 box.