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More challenges for the sudoku warrior! These 77 puzzles begin with typical sudoku-solving techniques, but then grow more complicated. Instead of figuring out just one game, you have to complete five multiple grids with overlapping corners. No grid is solvable on its own, and sometimes, you'll even have to work on two games at once in order to emerge victorious. An introduction, with a sample puzzle, lays out the strategies. It's loads of fun for the dedicated fan.
Conceptis Ltd. 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. Ltd.