Hard Sudoku

The classic logic puzzle – for those in search of a challenge, daily. Every row, column and 3x3 box should contain the numbers 1 to 9 once and once only. Can you complete the grid?

Select a grid square and type to input an answer. Using the menu at the top right, you can get a hint for a square if you get stuck, check your answers so far, reveal the solution, view the leaderboard, start again or print the puzzle to complete offline.