Just when you thought it was safe to pick up a pencil Killer Su Doku is based on the original Su Doku grid, with the same rules and numbers—1 to 9—but with an added deadly twist. This time there is an element of arithmetic involved and there are few, if any, clues. The aim is to not only complete every row, column, and cube so that it contains the digits 1 to 9, but to also fill in the outlined cubes so they add up to the same number. Hints to solve the puzzle are hidden in the joined squares where only one combination of numbers applies. In the case of joined squares, if the printed number is 3, it should be 1 and 2 that go into the squares. Likewise, in the case of three joined squares, if the printed number is 6, the only combination possible is 1, 2, and 3. To add one final fiendish level, each puzzle also has a time worked out by its Japanese creators so you can try to beat the clock.

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!

Challenge your brain--but not your eyes--with this classic collection or large print sudoku puzzles! 125 sudoku puzzles organized into five difficulty levels, from easy to expert. Sudoku grids are large, easy to read, and simple to fill out. Answer key in the back of the book. Spiral bound, 160 pages. Boost your brainpower with these fun and engaging large print sudoku puzzles!

Take a break and unwind with Brain Games Relax and Solve Sudoku! Includes more than 150 classic sudoku puzzles. Puzzles vary in difficulty, providing a satisfying activity for every skill level! Features a full answer key at the back of the book. Spiral bound, 192 pages.

This SUDOKU PUZZLE BOOK FOR ADULTS - 100 puzzls ★ Lots of sudoku puzzles: 100 Sudokus ★ Includes extra ♥ FREE BONUS DOWNLOADABLE ♥ ★ Expertly crafted with accurate skill levels ★ Includes instructions ★ Answers for every sudoku included in back ★ 25 easy, 25 medium, 25 hard, 25 extreme ★ 1 - Sudoku Per Pages -LARGE PRINT ★ 130 Pages ★ Many hours of fun! Great gift for all new and "old" Sudoku fans! We are very glad that you noticed and chose our ♥ SUDOKU PUZZLE BOOK FOR ADULTS ♥. The Sudoku book is a wonderful gift for holidays and birthdays, for friends, your parents, your spouse and children who will be grateful to you. Sudoku Book is a puzzle game that trains the brain, reduces the risk of Alzheimer's, relaxes and refreshes, helps calm down in stressful situations and gain energy. Sudoku Book is a fun game for all ages that can be played anytime, anywhere. We have made for you several levels of easy, difficult, very difficult and extreme. The solution to each puzzle is in the back, in case you need help. As you can see, there are a lot of pluses, so relax, grab a pencil, start training your brain and enjoy the Sudoku books from the "Brain Puzzle Book" series. Brain Puzzle Book

Relieve boredom and stress by playing Sudoku. This single level sudoku puzzle book contains plenty of puzzles to keep you busy for many hours. There are 4 puzzles per page and solutions are at the end of the book.