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From time to time some puzzles become so popular that they can drive the whole World to crazy. Rubik's Cube or Loyd's 14-15 Puzzle are two of the most famous samples of such puzzles.

Nowadays we have another puzzle phenomenon which conquered the whole World; its name is Sudoku. For a couple of past years a lot of different variations of the classic 9x9 Sudoku were invented and popularized. Many of them you can see in the Sudoku Variations article by Ed Pegg Jr. Below I'd like to show several new Sudoku variations.
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Important: All puzzles are published here with the kind permission of their authors, where applicable. Copyright to all presented puzzles stays with their respective authors, unless otherwise is stated.
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Printable Puzzle    

Printable Puzzle: To solve the puzzles presented here you can print them. While at the puzzle's page, click the respective image marked with the pictogram shown at left to go to a new window with the puzzle; then you can print it. Note that all these puzzles are copyrighted, so you can print them for your own use only, and not for any kind of commercial profit.
Christmas-tree Strimko by The Grabarchuk Family
 
Christmas-tree Strimko  
by The Grabarchuk Family
Fill in all the vacant bulbs in the four garlands decorating the Christmas-tree with numbers 1 through 7, a number per bulb, so that each garland contains seven different numbers. Enjoy this triangular version of the Strimko puzzle! As a warm-up you may try a small challenge (three garlands; numbers 1 through 5) shown in the thumbnail just on the left...
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Strimko by The Grabarchuk Family
 
Strimko  
by The Grabarchuk Family
Strimko is the newest and streamiest play with logic numbers created and developed by the Grabarchuk Family. The rules of Strimko are simple, the play is deep and fun, and the logic is as unique as each Strimko challenge. The Strimko.com website presents a set of three new Strimko puzzles each week both in interactive and printable formats. Enjoy the streamy logic of Strimko!...
Strimko.com >
Color Island Sudoku by Henry Kwok
 
Color Islands Sudoku
by Henry Kwok
Three color islands on a "standard" 9x9 grids add to a traditional puzzle new, exploring dimensions. It looks like you should solve several more sub-challenges, which in turn are helpful while you accomplishing the main task...
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DualDoku by Peter Grabarchuk
 
DualDoku
by Peter Grabarchuk
One more puzzle of the 2nd World Sudoku Championship held in Prague on March 28 -- April 1, 2007. The big grid consists of two partially overlapped 9x9 sub-grids. All the rules are as in the "standard" Sudoku...
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Slant Numbers by Serhiy Grabarchuk
 
Slant Numbers
by Serhiy Grabarchuk
This is another puzzle of the 2nd World Sudoku Championship held in Prague on March 28 -- April 1, 2007. It was part of the 2WSC play-off. Every square cell of a 6x6 square grid is divided diagonally into two triangle sub-cells (white and gray)...
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Constellation Sudoku by Henry Kwok
 
Constellation Sudoku
by Henry Kwok
It is a starry variation of Sudoku on a "standard" 9x9 grids with rules as in a "standard" Sudoku. In addition, you are provided with 32 clue-numbers, 15 starting numbers, and 15 stars on the board to place them. Does that make it easy, as you might expect?...
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Jigsaw-Roundoku by Serhiy Grabarchuk
 
Jigsaw-Roundoku
by Serhiy Grabarchuk
This was the final puzzle of the 2nd World Sudoku Championship held in Prague on March 28 -- April 1, 2007. The goal is to fill in a 9x9 grid assembled of nine jigsaw pieces with numbers 1 through 9 so that "round" numbers (3, 6, 8, and 9) go to the round ears of those jigsaw pieces...
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Twin Sudokus by Henry Kwok
 
Twin Sudokus
by Henry Kwok
This is a twin variation of Sudoku on two "standard" 9x9 grids which are solving simultaneously using all rules as in a "standard" Sudoku. The object is to fill in both 9x9 grids with two sets of nine different elements each...
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Network Products Sudoku by Henry Kwok
 
Network Products Sudoku
by Henry Kwok
This is a clever variation of Sudoku on a "standard" 9x9 grid which contains a network of special clue-numbers placed on the border lines between selected pairs of neighboring cells of the grid and covering the whole grid...
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Corner Squad Sudoku by Henry Kwok
 
Corner Squad Sudoku
by Henry Kwok
This is a variation of Sudoku on a "standard" 9x9 grid which contains a set of special clue-numbers always placed in the intersections of the grid lines. Each clue-number is the sum of all digits in all cells adjacent to this clue-number...
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Squared Outline Sudoku by Henry Kwok
 
Squared Outline Sudoku
by Henry Kwok
Another variation of Sudoku on a "standard" 9x9 grid. Additionally, you should observe two more rules while distributing numbers in the cells of the grid, and so have numbers in the two main diagonals and in a highlighted "diagonal" square harmonized...
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Quadruple Clue Sudoku by Henry Kwok
 
Quadruple Clue Sudoku
by Henry Kwok
One more clever variation of Sudoku on a "standard" 9x9 grid. It contains a set of special quadruple clue-numbers which are small numbers always placed in the intersections of the grid lines between selected quadruples of neighboring cells of the grid...
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Duplex Plex Sudoku by Henry Kwok
 
Duplex Plex Sudoku
by Henry Kwok
One more clever variation of Sudoku on a "standard" 9x9 grid. It contains a set of special clue-numbers which are small numbers always placed on the border lines between selected pairs of neighboring cells of the grid...
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Duplex Sums Sudoku by Henry Kwok
 
Duplex Sums Sudoku
by Henry Kwok
This is a clever variation of Sudoku on a "standard" 9x9 grid which contains a set of special clue-numbers placed on the border lines between selected pairs of neighboring cells of the grid...
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Dice Sudoku by Peter Grabarchuk
 
Dice Sudoku
by Peter Grabarchuk
Another version of a classic Sudoku developed to play with special cards and "standard" dice. You have a set of 6x6 challenge cards ranged from Beginner to Expert; these card can be printed on paper, cardboard, or cloth...
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Sud3oku by Peter Grabarchuk
 
Sudoku
by Peter Grabarchuk
This is a version of a classic Sudoku developed to play with special cards and cubes. You have a set of 6x6 challenge cards ranged from Beginner to Expert which can be placed on a 6x6 board with 36 cells...
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Last Updated: February 22, 2014
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