More Extreme Sudoku: 200 more of the toughest Sudoku puzzles known to man. (With
28,17 €
The difficulty level of the puzzles in Mr. Alary's books is generally considered to be a good notch or two above the hardest puzzles found in any other book. This book, like its predecessor, contains a selection of 200 of the toughest Sudoku puzzles along with their solutions.
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