an informational site about two of the famous puzzle games: kakuro and sudoku, with their history, play and techniques and the mathematics of both puzzle games ...

Newspaper, magazine, book and TV Sudoku syndication. We can generate any 3x3 Sudoku, 4x4 Super Sudoku and Samurai Sudoku puzzle with our unique and powerful ...

Godoku puzzle solver and Sudoku generators and solvers for 9x9 Sudoku, 16x16 Super Sudoku

Win prizes with our Super Sudoku competition. Sudoku solvers and generators for 9x9 Sudoku, 16x16 Super Sudoku, 5-grid Samurai Sudoku and Godoku puzzles

Definitive Sudoku generator for exclusive, logic-solveable 3x3 Sudoku, 5-grid Samurai Sudoku and 4x4 Super Sudoku puzzles

Intelligent Sudoku solver and generators for all 3x3 Sudoku, 5-grid Samurai Sudoku and 4x4 Super Sudoku puzzles

The definitive 4x4 Super Sudoku generator and solver, including solvers for 9x9 Sudoku, 5-grid Samurai Sudoku and Godoku puzzles

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Finite projective geometry explains why certain graphic designs retain symmetry under a group of 322,560 transformations.