The path of the king. Top Hidoku. Hidoku puzzle is a rectangular or square box consisting of cells. The task is to fill all the cells with consecutive numbers, which are connected vertically, horizontally or diagonally. Each puzzle already has the largest and smallest numbers. 400 Veteran (Very hard levels) + bonus in 250 classics very hard Sudoku 9 x 9 (bonus puzzles need to be downloaded and printed). The way to mastery of Sudoku! 400 unique Sudoku puzzles. Only 1 verified solution. All answers are at the end of the book. Only original puzzles for the power of your braindead gift for all fans of puzzles. A great book for free time and studying the mind. I hope you enjoy the book. Best regards, Basford Holmes