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These sudoku are easy to read . . . but challenging to solve, because every one of the 225 puzzles breaks out of the usual 9x9 mold. Try variants such as Irregular Sudoku, which replaces the usual 3x3 boxes with jigsaw-like shapes; Diagonal Sudoku, in which the long diagonals also contain the digits 1 through 9 exactly once each; and more!
Conceptis Puzzles is the leading number-logic and picture-logic puzzle supplier to magazine, newspaper, book, mobile, game console, and board game providers all over the world. Every day, more than ten million pages with Conceptis puzzles are printed in 40 countries worldwide. Conceptis cooperates with distributors in Korea, Russia, Poland, Brazil, and China, and has recently announced a first subsidiary: Conceptis Japan Co.