The Big Book of Sudoku Turquoise

Synopsis

No need to stop the puzzle fun with Big Book of Sudoku Volume I! Sharpen your mind and practice deductive reasoning with this second volume of sudoku puzzles for adults, including more than 540 challenges across four difficulty levels: Warm-Up, Challenging, and Tough. When you are done, test your skills on the ultimate Samurai Sudoku Puzzle--5 puzzles linked together by one central puzzle! Can you become a master samurai? Challenge accepted!

• OVER 500 PUZZLES & SOLUTIONS: Hours of fun and entertainment to enjoy.
• VARIETY OF LEVELS: From levels 1 to 3 increasing levels of difficulty including Warm Up, Challenging and Tough.
• LAY FLAT: Spiral-bound and paperback lays flat for ease of use at home or on the go.
• MAKES A GREAT GIFT For the sudoku puzzle lover, these books make great gifts for any birthdays, stocking suffers, road trips, and more.
• BRAIN BUSTERS(TM) Part of the Brain Busters Puzzle Collection from Parragon & Cottage Door Press. Look for other books including word finds, crosswords, picture puzzles, and more.

Summary

Chapter 1: Sudoku Basics

Introduces the basic rules of Sudoku and explains the different types of grids and puzzles.

Example:
A classic 9x9 Sudoku puzzle with a few numbers already filled in:

```
+-------+-------+-------+
| _ 6 _ | 1 _ 4 | _ 5 _ |
| _ _ 8 | 3 _ 5 | _ _ 1 |
| _ _ _ | _ _ _ | _ _ _ |
+-------+-------+-------+
| _ 2 _ | _ _ _ | _ 8 _ |
| _ _ 9 | _ _ _ | 1 _ _ |
| _ _ _ | 4 _ _ | _ 1 _ |
+-------+-------+-------+
| _ _ _ | _ _ 8 | _ _ 3 |
| _ _ 5 | 8 _ 3 | _ _ 9 |
| _ 4 _ | _ _ 1 | _ 2 _ |
+-------+-------+-------+
```

Chapter 2: Solving Techniques

Explores various solving techniques, such as scanning, naked singles, and hidden pairs.

Example:
Scanning the first row of the above puzzle, you can see that the only empty cell in the row is in the middle. Since the other three cells in the row contain the numbers 1, 4, and 5, the empty cell must contain the number 3.

Chapter 3: Intermediate Techniques

Introduces more advanced techniques, such as X-wing, swordfish, and hidden triplets.

Example:
In the above puzzle, you can form an X-wing with the numbers 2 and 9 in the second and seventh rows. This eliminates the number 9 from cells R2C3 and R7C7.

Chapter 4: Advanced Techniques

Covers the most challenging Sudoku solving techniques, including Y-wing, XY-wing, and kite.

Example:
In the above puzzle, a Y-wing with the numbers 1, 4, and 5 in the fifth column eliminates the number 5 from cells R4C5 and R8C5.

Chapter 5: Puzzle Solving Strategies

Provides guidance on how to approach different types of Sudoku puzzles, such as diagonal, samurai, and hyper puzzles.

Example:
In a diagonal Sudoku puzzle, you can solve the main diagonal first and then use the information to solve the rest of the grid.

Chapter 6: Variations and Extensions

Explores different variations of Sudoku, such as killer Sudoku, arrow Sudoku, and magic squares.

Example:
Killer Sudoku is a variation where some cages are given, and the sum of the numbers in each cage must add up to the number indicated in the cage.

Chapter 7: Solving Tips

Offers general tips and tricks for solving Sudoku puzzles more efficiently.

Examples:

* Always look for naked singles and hidden pairs first.
* Focus on one row, column, or 3x3 block at a time.
* Take breaks if you get stuck and come back to the puzzle later.
* Use a pencil and eraser, as mistakes are common.