Hard Sudoku - difficult sudoku puzzles and books

- difficultsudoku.com

Hard Sudoku books. Difficult Sudoku books. Top quality puzzles on top quality paper!

Not Applicable $ 8.95


Sudoku Kingdom - Play free sudoku puzzles online

- kingdomofsudoku.us

Provides Sudoku puzzles for printing, or to play online. Select a puzzle by difficulty level, time constraints, or simply print out a puzzle to take with you on a trip.Brain training game.

Not Applicable $ 8.95