Why not not just type the numbers in and press the Solution button to get the answer !
Free download from Download Sudoku. The download zip file includes two sample puzzles, one easy, one hard. At first the Solution button is grayed out, but it will function as soon as you type in a puzzle and save it as a text file.
To recover a puzzle file from your folder use the menu Grid.
The original entry is in red, and the solution in blue.