Editors of Nikoli Publishing

The next step, like having a whole book of just Saturday Times crossword puzzles. Even more fiendish, even more fun, X-treme Sudoku proudly presents 320…

Over twenty years ago Nikoli, the Japanese puzzle and game company, started publishing a curious logic puzzle called Sudoku. The rest of the world recently…

“The Best Puzzles Are Made by Happy Employees.” So Ad Age describes the credo of Nikoli, the Japanese puzzle company that invented the Sudoku craze…

Prepare to be obsessed. Match wits with the experts who created Sudoku. Arranged from “Easy” to “Very Hard,” here are over 300 logic puzzles that…