Sudoku Archive

Free Daily Sudoku

These sudoku variants appear daily as Sudoku of the Day. Like classic sudoku, these puzzles are composed of 3×3 boxes joined by rows and columns. Unlike classic sudoku, the 3×3 boxes are not in a 3×3 grid. Every Sunday features a new Cube Sudoku with six 4×4 boxes. Check out the different configurations! Which one is your favorite?

• 29 July: 9×(3×3), Moderate to Hard
• 28 July: 6×(3×3), Moderate to Hard
• 27 July: 9×(3×3), Easy to Moderate
• 26 July: 6×(3×3), Easy to Moderate
• 25 July: 6×(4×4), Easy to Moderate
• 24 July: 12×(3×3), Moderate to Hard
• 23 July: 6×(3×3), Hard to Very Hard
• 22 July: 9×(3×3), Moderate to Hard
• 21 July: 6×(3×3), Moderate to Hard
• 20 July: 9×(3×3), Easy to Moderate
• 19 July: 6×(3×3), Easy to Moderate
• 18 July: 6×(4×4), Moderate to Hard
• 17 July: 12×(3×3), Easy to Moderate
• 16 July: 6×(3×3), Hard to Very Hard
• 15 July: 9×(3×3), Moderate to Hard
• 14 July: 6×(3×3), Moderate to Hard
• 13 July: 9×(3×3), Easy to Moderate
• 12 July: 6×(3×3), Easy to Moderate
• 11 July: 6×(4×4), Easy to Moderate
• 10 July: 12×(3×3), Moderate to Hard
• 9 July: 6×(3×3), Hard to Very Hard
• 8 July: 9×(3×3), Moderate to Hard
• 7 July: 6×(3×3), Moderate to Hard
• 6 July: 9×(3×3), Easy to Moderate
• 5 July: 6×(3×3), Easy to Moderate
• 4 July: 6×(4×4), Moderate to Hard
• 3 July: 12×(3×3), Easy to Moderate
• 2 July: 6×(3×3), Hard to Very Hard
• 1 July: 9×(3×3), Moderate to Hard
• 30 June: 6×(3×3), Moderate to Hard
• 29 June: 9×(3×3), Easy to Moderate
• 28 June: 6×(3×3), Easy to Moderate

Other Sudoku Variants

There are also archives of Code-Doku and Cube Sudoku puzzles.

Custom Puzzles

Custom puzzles are available to individuals and for publication. Contact me at the address below. Some of the puzzle types available:

• Variants like the Sudoku of the Day puzzles 6×(3×3), 6×(3×3), 9×(3×3), 9×(3×3), 9×(3×3), 9×(3×3), 9×(3×3), 12×(3×3), 12×(3×3), 12×(3×3), 12×(3×3), 12×(3×3) and others.
• Cube Sudoku 6×(4×4)
• Code Doku fully determined or underdetermined
• Jigsaw sudoku 7×7, 11×11 and others
• Classic sudoku (3×3)×(3×3)
• Sudoku in other sizes 12×12, 8×8 and others
• Sudoku with overlapping grids Samurai Sudoku and others
• Jigsaw Code Doku 5×5, 11×11
• Super Code Doku (with overlapping grids) two grids, three grids
• Letter-based sudoku with a displayed message Happy Holidays, Merry Christmas

Puzzles are available in varying difficulties. Standard delivery is as text or HTML, but delivery as artwork (high resolution image) is also available. My puzzles are not usually symmetric because I prefer asymmetric puzzles, but I'm not a purist and symmetric puzzles are available, including symmetric Code Doku.

Please send responses to

Thanks,
Steve