Free Sudoku Puzzles Online - Number Place - Medium

Frequently Asked Questions

What techniques do I need to solve a Medium puzzle?

In addition to the Naked Singles from Easy, Medium requires Hidden Singles — spotting the one cell in a row, column, or box where a given digit can go. Writing down candidates with the notes feature is recommended.

When am I ready to move up from Easy to Medium?

When you can solve Easy puzzles consistently. If Medium feels too hard, do not force it — go back one level, build a solid foundation, and try again.

What should I do when I get stuck on a Medium puzzle?

An oversight is the most common cause, so re-check the three constraints — row, column, and box — one by one. If you still cannot find a cell to fill, hunting for Hidden Singles is usually the breakthrough.