The Su Do Ku helper tool just got better!!! Check the new version!

I just added some new features to the Excel Su Do Ku tool I was working on. You know, sometimes it happens that you enter a number where it is not supposed to be. It either exist in the row, or in the column, or somewhere in the 9 field cell.
Now, if you do so, the problematic fields get imediately highlighted in yellow.

Check the two images below... The first one shows a sudoku puzzle without mistakes. Look the second image and what happens when you enter a number that is in a wrong place. It's a "3" in the particular case. The sudoku fields that cause the problem immediately change color and turn yellow.

and

I hope that this new features add to the pleasure of using this little tool.