Good, but needs more features

I have used pen&paper and several different programs to play Sudoku, this one rates near the bottom of the pack, just above pen and paper. First problem: no hint. For example, how about a function to fill in all legal moves as hints. I can do this myself, but it is long and tedious, not part of the "fun" of figuring out what to do when no obvious move exists. Second, a good keyboard only interface. The problem here is that the arrow keys make the hilight jump over filled in squares, making it complex to move to the square you want to be on. Finally, after working for a while on a solution, and it does not work, how about a way of checking the correctness of a number in a cell?

petermrice about Sudoku Deluxe