400 CHAIN HARD - VERY HARD classic puzzles 9 x 9 + BONUS 250 veteran sudoku: Holmes is a perfectly compiled sudoku book. Master of puzzles chain Sudok - Paperback

by Basford Holmes (Author)

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. 200 Professional (Hard levels). 200 Veteran (Very 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. Original puzzles. A great book for free time and studying the mind. I hope you enjoy the book. Best regards, Basford Holmes