Printable Sudoku
- Binary
- Chain Sudoku
- Consecutive
- Cross Sudoku
- Flower Sudoku
- Frame Sudoku
- Futoshiki
- Greater Than
- Jigsaw Sudoku
- Kakuro
- KenKen
- Killer Sudoku
- Kropki Sudoku
- Little Killer
- Magic Squares
- Odd Even Sudoku
- Outside Sudoku
- Rossini Sudoku
- Samurai Sudoku
- Sandwich
- Skyscraper
- Sohei Sudoku
- Star Battle
- Sudoku
- Sudoku Mine
- Sudoku XV
- Sujiken
- Tripledoku
- Tripod Sudoku
- Twodoku
- Vudoku
- Windmill
Play / Solve
Hard Sudoku Puzzles
Hard Sudoku is a brain challenging number puzzle game. The game is considered "hard" because it often takes longer to solve than an easy or medium puzzle.
To complete a hard Sudoku puzzle, players must use a variety of strategies, including deducing which numbers go in which squares and eliminating possibilities through logical reasoning.
Sudoku Puzzles help keep your mind sharp while enjoying a challenging logic game. The puzzle can be played online or printed out and solved at your leisure.
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6x6 Sudoku - Hard - 12
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6x6 Sudoku - Hard - 16
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8x8 Sudoku - Hard - 8
4x4 Sudoku - Hard - 13
4x4 Sudoku - Hard - 4
4x4 Sudoku - Hard - 8
4x4 Sudoku - Hard - 15
4x4 Sudoku - Hard - 7
4x4 Sudoku - Hard - 11
4x4 Sudoku - Hard - 20
4x4 Sudoku - Hard - 19
4x4 Sudoku - Hard - 5
While hard Sudoku may take longer to solve, it is often more satisfying to complete than an easy puzzle. For Sudoku lovers looking for a challenge, hard Sudoku is the perfect puzzle game.