Sudoku fans will welcome this bright new twist to the popular puzzles! Every one of these ingenious creations—from “Bold X” to “Rainbow Up”—makes colors and patterns part of the solving fun. And although each puzzle maintains the normal 9x9 grid and follows the basic rules of the game, every style adds an additional restriction to intensify the challenge. In “Worms,” for example, swirly, squirmy shapes fill the grids; the numbers increase as you work your way from head to tail. “Even/Odd” features squares in two colors, depending on whether the number to fill it is even or odd. And in “Positional Board,” no two of the red squares can be the same number. They’re all lots of fun!

Color Sudoku

Humor & Entertainment

Taalman, Laura

Riley, Philip

Brainfreeze Puzzles

Puzzles & Games

Puzzlewright

All the starting numbers have been stripped away, leaving you with something truly intriguing: Naked Sudoku. Each puzzle is a variation on regular sudoku, but there are no starting numbers to help. Instead, you must use other types of clues to determine where to begin. In one variant, for instance, greater-than and less-than signs point out the way. These are sudoku puzzles that will push your brain to the limit and expose your true sudoku talent.

Naked Sudoku: Brainfreeze Puzzles

Laura Taalman

Philip Riley

Unlike many sudoku, where a third of the squares are filled in, each of these puzzles has only 18 givens (completed squares). That means fans enjoy more of a challenge. All the puzzles are expertly crafted to satisfy both casual solvers on a break and sudoku die-hards relaxing on a Sunday afternoon.

No-Frills Sudoku: Only 18 Clues Per Puzzle

Ready to take your sudoku skills to the next level? Beyond Sudoku features more than 150 ingenious puzzles with extra regions indicated by colored squares or colored dotted lines. The play of patterns and colors makes each grid a unique work of art, and there's only one new rule: no numbers may repeat in the extra regions. But that simple rule takes you Beyond Sudoku to a new world of challenges and fun!

Beyond Sudoku

Whips, handcuffs . . . sudoku? When you're in the mood for some masochistic pleasure, this variant of the popular puzzle will satisfy your desires. Each 10x10 grid is divided into ten regions of 5x2. Play like regular sudoku, except using numbers 0-9. Then comes the twist: each sudoku also has five 10-square grey regions to complete—a total of 50 squares of grey.

Fifty Squares of Grey: The Spanking-New Sudoku Variant

Who said sudoku have to be black and white? These 180 multihued puzzles come in a rainbow of glorious colors and patterns that enhance the fun. Although they begin with the standard 9×9 grid and follow the basic rules, each sudoku offers a fresh twist to tradition: perhaps every red square must contain a different number, or a puzzle may look like a jigsaw. It’s the perfect collection for solvers who enjoy a challenge that’s way out of the ordinary.

Rainbow Sudoku

These puzzles are not dressed to the “9’s”! That’s because not one of these sudoku contains the number 9 as a given, so solvers must do some mining to discover where they belong. Pixel-y, nerdy, creative, and challenging, Ninecraft Sudoku features nearly 190 puzzles that get harder as you go along, and includes some grids with givens that are in shapes seen in mining games.

Ninecraft Sudoku

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