Eijidoku - http://www.eijidoku.com/
Word based version of the game. |
Killer Samurai Sudoku - http://www.killer-samurai.com/
Offers printable samurai sudoku puzzles for download. Also provides rules and solution strategies. |
Math Games: Sudoku Variations - http://www.maa.org/editorial/mathgames/mathgames_09_05_05.html
Offers detailed descriptions and illustrations of Sudoku variations, including Diagonal, Cubical, Even-Odd, and hybrids. Also includes a short history. |
Mathematical Recreations - http://www.mathrec.org/sudoku/
Custom Word Doku puzzles devised by Steve Schaefer. Features an entire sentence embedded into the puzzle. |
Sudoku Samurai - http://www.binaryworlds.com/sudoku/
Offers printable sudoku samurai puzzles for download. |