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Explained Sudoku

by George Ho

149 pages; quality trade paperback (softcover); catalogue #07-1504; ISBN 1-4251-3778-4; US$15.00, C$15.00, EUR10.25, £7.74

'Explained SUDOKU' by Dr. George Ho: a book containing 30 hard or very hard SUDOKU puzzles with solutions fully explained, solved by a Uniform Method with many techniques clearly specified.

About the Book

The standard SUDOKU puzzle is a grid of 81 cells made up of nine rows, nine columns and subdivided into nine 3x3 blocks. In a SUDOKU puzzle, some cells of the grid come with the numbers 1 to 9 already inserted. The objective is to fill in all blank cells with numbers from 1 to 9 in such a way that each row, each column and each 3x3 block of the grid contains all numbers from 1 to 9.

'Explained SUDOKU' is the follow-up of the first book 'SUDOKU Training' (of same author, published by Trafford Publishing in June 2007). It presents concisely the Rules, Techniques and a Uniform Method to solve logically and systematically SUDOKU puzzles at many levels of difficulty, illustrated through 30 hard or very hard SUDOKU puzzles with Solutions fully explained.

The book is divided into 3 parts:

Part A — Brief description of the Terminology and Techniques used to solve SUDOKU puzzles.

Part B — Possible steps of a Uniform Method to solve logically and systematically SUDOKU puzzles. Description of the new concept 'Extended Chain Filling'.

Part C — Fully explained Solutions of 30 hard or very hard SUDOKU puzzles and 'How to get benefit from them'.

The author hopes that the Explained Solutions described in this book will soon become a standard presentation for SUDOKU Solutions when these solutions are presented to others for assessment.

With this standard, computer software can be allowed to use, the speed of solving is not a major factor but the logic thinking of the solver is more important as it can be proved and assessed.

About the Author

Dr. George Ho graduated in Mathematics from the Faculty of Pedagogy, University of Saigon in 1962. He holds a Bachelor in Mathematics (1965), a Doctorat d'État és Sciences Physiques (1975), University of Saigon, Vietnam, and a Graduate Diploma in Data Processing (1982), University of Technology, Sydney, Australia.

He used to be a teacher at a high school, a former Assistant Lecturer at the Faculty of Sciences, Saigon, Vietnam.

His last job was with Baycorp Advantage Limited in Sydney.

He retired in July 2006.

Excerpts