Medium Sudoku
A balanced challenge that goes beyond naked singles. Medium puzzles require scanning for "hidden singles" — digits that can only fit one cell in a row, column, or box — making each solve feel rewarding.
Loading…
What techniques do you need for medium Sudoku?
Medium Sudoku requires naked singles (only one candidate in a cell) and hidden singles (one candidate that fits only one cell in a group). These two techniques alone are enough to crack most medium grids.
About Sudoku
Sudoku is the timeless number-placement puzzle. Fill the 9x9 grid so every row, column, and 3x3 box contains each digit from 1 to 9 exactly once. Easy, medium, and hard puzzles — generated fresh every time. Free to play online.