For the last 2-3 days the daily Sudoku game doesn’t appear when I try to access it.

I want to play Daily Yahoo but would like a different rating.

Regardless of which numbers are shown on the grid before attempting to complete it. I imagine factorial Mathematics comes into it somewhere. For instance, there are 9! (9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1)different ways of writing the numbers 1 to 9. Is there a formula for working out the total of different Sudoku solutions?

I need regular SuDoku puzzles that can be printed out. Any level is ok.

This is my first time trying to solve a sudoku puzzle. I can’t figure it out. Everything is a mess. How can I figure this out or organize it. Tips would be great. Thanks!
Oh yeah and are there any programs on the internet I can use. Like can I enter in the numbers that the puzzle gives me and then the program helps me fill in the rest?