Medium Sudoku — Play Free Medium 9×9 Puzzles

A balanced challenge: enough clues to keep things flowing, few enough to make you think. This is where sudoku starts getting addictive.

What Makes a Sudoku Medium?

Medium puzzles begin with roughly 30–35 given digits. Scanning alone no longer finishes the grid — you will hit points where several digits are possible in a cell, and that is exactly when candidate notes become your best tool. Turn on notes mode, pencil in the possibilities, and let the patterns reveal themselves.

Techniques You Need

• Naked pairs: if two cells in a unit can only be the same two digits, those digits can be removed from every other cell in that unit.
• Pointing pairs: if a digit's candidates inside a box all sit in one row or column, that digit can be eliminated elsewhere along that line.
• Box-line reduction: the mirror of pointing pairs — if a digit in a row or column is confined to one box, remove it from the rest of that box.

How to Get Faster

• Update your notes the moment you place a number; stale notes cause most mistakes.
• After every placement, re-scan the affected row, column, and box before moving on.
• Use the hint button when truly stuck instead of guessing — then study the cell it revealed.

Comfortable here? Try hard sudoku, or brush up with the full list of sudoku strategies.