The New Sudoku Players' Forum

[Fehmi]

please anyone told me
why sudoku give me mistake ?????

there is image in attachment

[dxSudoku]

It doesn't seem like it is a valid Sudoku. There is more than one solution.

[yzfwsf]

r6c1 is 7

[dxSudoku]

You need to fill out all the possible values that can occur in each cell. Some programs do this automatically. I am very fond of Hodoku for this:

easy1.png (62.19 KiB) Viewed 709 times

When you put in all the possible values you will see a number of Naked Singles which are circled.

I did a bunch of tutorials that may help you learn about puzzle solving techniques like Naked Single:

https://www.youtube.com/playlist?list=PLDT9hh28q4mzaqGUzf3jd4rQ3xYRNzYIV

Just cut-n-paste the URL into your browser to see the list. I hope they help you!