# Sudoku Puzzle Secrets

INTRODUCTION ………………………………………….. 03
CHAPTER 1: HISTORY OF SUDOKU ………………… 05
CHAPTER 2: SUDOKU EXPLAINED …………………. 08
CHAPTER 3:

## Overview

INTRODUCTION ………………………………………….. 03
CHAPTER 1: HISTORY OF SUDOKU ………………… 05
CHAPTER 2: SUDOKU EXPLAINED …………………. 08
CHAPTER 3: THE MATH BEHIND SUDOKU ……….. 14
CHAPTER 4: CONSTRUCTION OF THE PUZZLE ….. 18
CHAPTER 5: SOLUTION METHODS–SCANNING ... 20
CHAPTER 6: BEGINNING THE CHALLENGE ………. 24
CHAPTER 7: CHANGE OF STRATEGY …………………31
CHAPTER 8: ELIMINATE THE EXTRANEOUS ……… 37
CHAPTER 9: WHEN EVERYTHING ELSE FAILS …... 44
CHAPTER 10: SOLVING A DIABOLICAL PUZZLE … 47
CHAPTER 11: SAMPLE SUDOKU PUZZLES ………….52
CHAPTER 12: SOLUTIONS ……………………………… 58
CONCLUSION ………………………………………………. 63

It seems that these days everyone is enjoying the game
of Sudoko wherever they are. The Sudoku puzzle is ideal
for whenever you have a few spare minutes and want to
indulge in a little bit of thinking power. Sudoku,
sometimes spelled “Su Doku”, is a puzzle that originated
in Japan. The puzzle is known as a “placement” puzzle.
In the United States Sudoku is sometimes called the
“Number Place” puzzle.
People of all ages and from all backgrounds are finding
that Sudoku is a great way to keep their mind active and
thinking. Puzzles range all the way from easy for the
beginner to extremely difficult for the more advanced
puzzler. Sudoku is easy to take with you wherever you
go so that you can indulge in a little bit of number
guessing whenever you have a few spare minutes.
Sudoku is easy to learn and understand. The main aim of
Sudoku is to enter a number from one to nine into each
cell on puzzle grid. The most frequent layout of a Sudoku
puzzle is a 9 x 9 grid that is made of subgrids that are 3 x
3. Each of these subgrids is known as a “region”.
Depending on how easy or hard the puzzle is there will be
various starting numbers in the cells. These are known as
3
the “givens”. Every row, column, and region of the
Sudoku puzzle can contain only one instance of each
number. You complete the puzzle when all of the cells
have been filled in with corresponding numbers.
To complete the Sudoku puzzle requires a lot of patience
as well as the ability to think logically. The basic layout of
the Sudoku grid is much like a chess game or crossword
puzzles. Sudoku is not just a mathematical or arithmetic
type of puzzle. It works just as well if the numbers are
substituted with letters or other symbols. However,
numbers work best.
The bottom line is that Sudoku is a fascinating new puzzle
game that has taken the world by surprise and storm.
You can now find Sudoku in many national newspapers.
principle of solving it is really quite simple. All you need
to do is fill in the grid in such a way that each row,
column, and region contains the numbers one to nine.
4
CHAPTER I: HISTORY OF SUDUKO
You would imagine that with such a name this puzzle
originated in Japan, but it has been around for many
years in the United States and in the UK. However, the
Japanese found an example under the title “Number
Place’ in an American magazine and translated it as
something quite different: su meaning number and doku
meaning single unit. It immediately caught on in Japan
where number puzzles were much more prevalent than
word puzzles. Crosswords don’t work very well in the
Japanese language.
Sukoku was first published in the late 1970’s in North
America in New York by the publisher “Dell Magazines”.
Dell was known as a specialist when it game to puzzles of
logic and ability. Dell published Sudoku as “Number
Place” in its Math Puzzles and Logic Problems magazine.
It has not been recorded who designed the Americanized
puzzle but suspicion falls on Walter Mackey who was one
of Dell’s constructors of puzzles. In Japan, Sudoku was
first introduced by Nikoli in 1984. The puzzle appeared in
the Monthly Nikolist in April as “Suuji wa dokushin ni
kagiru”. This can be translated to “the numbers must be
there in only on instance”.

## Product Details

ISBN-13:
2940014026406
Publisher:
Laiftllc.com
Publication date:
06/08/2013
Sold by:
Barnes & Noble
Format:
NOOK Book
Pages:
66
Sales rank:
956,417
File size:
232 KB

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