"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 and supplies 100% of the puzzles published in Japanese newspapers and magazines. And when they say "made," they mean literally handmade--unlike the co[...]
"Expert Sudoku" is an all-new collection of handcrafted puzzles for the expert puzzle-solver. This is the book that challenges skilled solvers and Sudoku-lovers at the top level every one of the 320 puzzles is rated "difficult." Good luck
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