The daily sudoku: hard

Fill in the grid so that every row, every column and every 3x3 box contains the digits 1 to 9. Each puzzle has a single solution.

Click and hold the Solve button to see the solution, or the Hint button to give you a clue about where you can place the next number. Click Reset to start again.

It is possible to enter incorrect numbers, but not numbers that already occur in the same row, column or box. So if you are unable to enter a number, check that it's not there already!

Good luck!

- Too hard? Try the easy puzzle or medium puzzle
- Swap hints and tips on the message board