This is the archive of the old posts from Djape .Net, more or less as they used to be. Please go to to see the new website.

Why another Sudoku solver?

First of all, Perfect Sudoku is not only a Sudoku solver. It is most importantly a generator of what I call perfect Sudoku puzzles. It can also be used as a playing program. What’s a perfect sudoku? A perfect sudoku has these properties: 1. It’s symmetrical; 2. It has one and only one solution; 3. If you remove any single field (and it’s symmetrical counterpart) which is set in the puzzle, you will get a puzzle with multiple solutions; 4. It can be created in different shapes and sizes: Classic Sudoku (3×3), small (2×2), large (4×4), huge (5×5) but also some weird looking ones, such as, believe it or not, 2×12! Some non-standard but fun Sudoku puzzles that can be created with Perfect Sudoku: 1. Non-symmetrical – usually more difficult than the symmetrical ones. 2. Diagonal Sudoku – now the two diagonals in your puzzle must also contain only one occurrence of each sign (digit or character) used; this makes the puzzles even harder! More about the features of the program coming soon…
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  • By Archive of daily puzzles delayed :( on February 3, 2012 at 2:58 pm

    […] all Killer Sudoku’s generated and posted here are “perfect” (see the definition here), the same way as regular Sudoku’s […]

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