If you enjoyed the game here are some more sudoku items that will interest you.

**Sudoku Variations**

In 2004 Sudoku started to become world famous with a standard 9 by 9 Sudoku grid. From this simple but brilliant puzzle lot’s of Sudoku variants were designed. We’ve tried to list as much as possible Sudoku Variants we could find. Until now we’ve found more than 40 different kind of Sudoku puzzle look-a-likes. Please contact us if you know more sudoku variants.

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- 4D Sudoku – The challenge of 4D Sudoku is to construct a square block of numbered cubes, arranged in such a way that every possible row, column and side around the block contains each of the numbers 1-9.
- Braille Sudoku – a Sudoku-game for both blind and seeing people with Braille on the chips and sheets.
- Casino Sudoku – This Casino-style take on the classic brain teaser Sudoku with the same rules only a different lay-out (numbers, chips and suits).
- Circle Sum Sudoku – a cross between kakuro and sudoku.
- Cluedoku – A Sudoku based puzzle game for kids by National Geographic.
- Color Sudoku – This version uses nine colors in stead of numbers.
- Consecutive Sudoku – Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. All neighbouring cells with consecutive digits have a colored border between.
- Curve Sudoku – This puzzles is Sudoku but with curved sections. This one has difference markers and greater-than symbols for clues.
- Geometry Sudoku – Latin Squares Puzzles
- Giant Sudoku’s – You’ll find Giant Sudoku’s in several sizes : 16×16, 25×25, 36×36, 49×49, 64×64, 81×81 and 100×100, so Sudoku’s with grids from 256 to 10000 cells.
- Greater Than Sudoku – The values of each cell must obey the relationship between the cells specified with ‘>’ or ‘<‘.
- Hexafex – a sudoku variant with a hexagonal board and triangular cells.
- Hidden Skyscraper Sudoku – Fill in the grid with the digits 1-9 such that each row, each column and each 3 x 3 box contains each digit once.
- Jigsaw Rokudoku – Fill in the grid so that every row, every column, and every coloured region contains the digits 1 through 6.
- Killer Sudoku – The sum of the cells in a cage must equal the total given for the cage. Each digit in the cage must be unique.
- LCM Sudoku – At the bottom and right side of the 9×9 grid are numbers, each of which is the Least Common Multiple (LCM) of the given variables in the corresponding column or row of the 9×9 grid.
- Lexoku – In a Lexoku puzzle you’re given a 6×6 grid – six rows, six columns and six 2×3 blocks. You’re also given a list of words.
- Logi-5 (Pento-Sudoku) – Fill in the grid so that every row, every column, and every marked 5 fields box contains the digits 1 through 5.
- Magic Sudoku – It contains only 9 numbers (1 till 9). The rules of standard sudoku apply: every row, column, and 3×3 square must be filled in with all of the numbers from 1 to 9. But with the following two additional restrictions: Both of the main diagonals must also contain every number between 1 and 9. and each number inside the polyomino (blue cells) must be no larger than the number of blue cells in its 3×3 square
- MathDoku – is loosely similar to killer sudoku and based on the same rules of Kenken.
- Maxi Sudoku (10×10) – Fill in the grid so that every row, every column, and 5×2 box contains the digits 0 through 9.
- Maxi Sudoku (12×12) – Fill in the grid so that every row, every column, and 4×3 box contains the numbers 1 through 12.
- Maxi-Sudoku (15×15) – Fill in the grid so that every row, every column, and 5×3 box contains the letters A through O.
- Meta Sudoku – created by Wei-Hwa Huang, where the object is to finish drawing the 5×5 grid’s pentomino-region borders so as to leave a uniquely solvable puzzle with no identically-shaped regions.
- Mini Jigsaw Sudoku – Fill in the grid so that every row, every column, and cells of the same color contain the digits 1 through 7.
- Mini-sudoku – is not just a sudoku puzzle with a smaller grid, but it’s more clever than that. Mini Sudoku is a 3×3 grid, one of the inner squares in a sudoku puzzle. This means that the squares in the grid need to be filled with the digits 1-9. The only clues that you have is the sum of the digits in L-shaped sections around the outside of the grid.
- Mini-sudoku – Fill in the grid so that every row, every column, and 4×2 box contains the digits 1 through 8. There is only one solution. You can find it by logic.
- Monster Sudoku – also called Dodeka Sudoku. It is bigger and can be more difficult than normal Sudoku’s. Monster Sudoku can have a 12×12 or 16×16 grid.
- Multi Sudoku – This sudoku variation contains two 6 by 6 cell grids which overlap in a 2 by 3 region. Each grid contains different clues, which include greater-than symbols and even digit markers.
- Penrose Sudoku – This Sudoku variant is based upon the Penrose Slitherlink the quasi-periodic 5-fold tiling discovered by Sir Roger Penrose. The main trick to solving the puzzle seems to be discovering the row/column equivalents.
- Quadruple Clue Sudoku – Each Quadruple Clue Sudoku puzzle contains features a six by six sudoku grid with four numbers at some of the grid intersection points. These four numbers correspond to the four numbers in the four adjoining squares. It’s another way of providing starting clues, without telling you exactly where they are.
- Pole Star Sudoku – There are special clue-numbers placed on the border lines between selected pairs of adjacent squares of the grid. Each clue-number is the difference between the two numbers that should be in the respective pair of the adjacent squares just next to left and right from that clue-number.
- Quad Clue Sudoku – This quad clue sudoku sheet contains 9 puzzles to solve. Each puzzle contains clues that represent the 4 digits from the adjacent squares.
- Raetselmann.de – Several variants based on overlapping sudoku grids, including a monster based on 11 grids in the archive.
- Rokudoku – Fill in the grid so that every row, every column, and every 3×2 box contains the digits 1 through 6.
- Samurai Sudoku – Samurai sudoku puzzles consist of five overlapping sudoku grids.
- Scoreboard Sudoku – Is a Sudoku puzzle that combines baseball and sudoku. This variation on Sudoku requires some knowledge of Sudoku and baseball.
- Shidoku – Fill in the grid so that every row, every column, and every 2 x 2 box contains the digits 1 through 4.
- Sudoku X – In addition to standard sudoku, the numbers must only occur once in each side of the ‘X’ that is marked across the sudoku grid.
- Stars & Stripes Sudoku – Each 12 x 12 grid has the familiar 1 – 9’s, but also has three stars in each row, box and column. Instead of using letters A, B,and C, the puzzle uses three stars in the form of an asterisk (*). The difference is the 3 stars (*) are the “same”. Each row, column, and 4×3 box will contain three stars in a finished puzzle.
- Str8ts Puzzle – is about identifying the next cells that can be deduced from the clues in the black and white cells.
- Sums Sudoku – The digits within the oddly shaped “inner boxes” (marked by dotted lines) must add up to the small number written in the top corner of that box. Apart from that, all the normal Su Doku rules apply
- Top Notch Two Doku – Two overlapping sudoku grids. One new puzzle per week. Basic online solver.
- Tredoku – Tredoku puzzels come in infinite forms due to the extra dimension which gives you as a Sudoku player, a unique experience.
- Windoku (aka HyperSudoku) – Next to the nine grids in normal Sudoku puzzles this Sudoku variant has four extra grids which are shaded. Each of the nine grids and the four shaded grids must contain the numbers 1-9.
- Zengaku – Zengaku is a blend between Sudoku and Kakuro puzzles and this form of puzzle was featured in the 2004 World Puzzle Federation Qualifiers.