Sudoku: Hard
Switch Notes on early and fill in every possible number for the squares of one box.
About Hard level
Hard Sudoku gives about 28 numbers. Single steps are not enough, so you need pencil notes and the habit of spotting pairs of numbers that share two squares.
A tip for this level
Switch Notes on early and fill in every possible number for the squares of one box.
Other Sudoku levels
- Sudoku Easy
Easy Sudoku gives about 40 numbers, and each step has one clear answer. - Sudoku Medium
Medium Sudoku gives about 33 numbers. - Sudoku Near impossible
Near impossible Sudoku gives as few numbers as the puzzle can carry while still having exactly one answer.
New to Sudoku? Read the rules and tips on the main Sudoku page.
More games
Klondike, Pyramid, TriPeaks, or see all of the games.