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The way to mastery of Sudoku! Sudoku consists of a chain of circles. Figures are arranged in circles in such a way that horizontally and vertically all numbers are different. In the links of one chain, the numbers should not be repeated. 400 Professional (Hard levels). + bonus in 250 classics very hard Sudoku 9 x 9 (bonus puzzles need to be downloaded and printed). Only 1 verified solution. All answers are at the end of the book. Only original puzzles. A great book for free time and studying the mind. I hope you enjoy the book. Best regards, Basford Holmes

Produktbeschreibung
The way to mastery of Sudoku! Sudoku consists of a chain of circles. Figures are arranged in circles in such a way that horizontally and vertically all numbers are different. In the links of one chain, the numbers should not be repeated. 400 Professional (Hard levels). + bonus in 250 classics very hard Sudoku 9 x 9 (bonus puzzles need to be downloaded and printed). Only 1 verified solution. All answers are at the end of the book. Only original puzzles. A great book for free time and studying the mind. I hope you enjoy the book. Best regards, Basford Holmes