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Sudoku Book PDF Free Download: How to Find and Enjoy Sudoku Puzzles Online

If you are looking for a fun and challenging way to exercise your brain, sudoku puzzles are a great option. Sudoku is a popular logic-based number puzzle that can keep you entertained for hours. But where can you find sudoku books in PDF format that you can download for free and print at your convenience? In this article, we will show you some of the best websites that offer free sudoku books in PDF format, as well as some tips and tricks on how to play and solve sudoku puzzles faster and easier.

What is Sudoku and How to Play It

Sudoku is a puzzle game that consists of a 9x9 grid divided into nine 3x3 boxes. The goal is to fill in the grid with numbers from 1 to 9, following some simple rules. Each row, column, and box must contain each number only once. No math or calculation is required, only logic and deduction.

The Basic Rules of Sudoku

Here are the three main rules of sudoku:

Each row should have numbers 1-9, no repeats
Each column should have numbers 1-9, no repeats
Each 3x3 quadrant should have numbers 1-9, no repeats

Bonus rule: Mathematically this means the sum of each of these categories should be 45.

The Benefits of Sudoku for the Brain

Playing sudoku brings many benefits for your brain; you’ll train skills you already have and also acquire some new ones. For example, sudoku is a workout for your perception, memory, logic, and coordination. Studies on the use of math in these types of games have shown that among the skills required are ingenuity, imagination, and patience.

According to a study published in the International Journal of Geriatric Psychiatry, the more people over 50 engage in games such as sudoku and crosswords, the better their brains function. The study found that people who do puzzles have brain function equivalent to 10 years younger than their age. Playing sudoku may also help prevent cognitive decline and reduce the risk of Alzheimer's disease.

Where to Find Sudoku Books in PDF Format

There are many websites that offer free sudoku books in PDF format that you can download and print. Here are some of the best ones we found:

Kaidoku: Free Sudoku Books Created with Kaidoku

Kaidoku is a website that allows you to create your own sudoku puzzles using a simple interface. You can choose the size, level, and style of your puzzles, and then download them as PDF files. You can also download free sudoku books created with Kaidoku. There are four levels available: trivial, very easy, easy, and normal. Each book contains 100 to 500 problems.

Sudoku Printables by Krazydad: Thousands of Free Sudoku Puzzles to Print

Sudoku Printables by Krazydad is a website that offers thousands of free sudoku puzzles to print. Each booklet of printable sudoku contains eight puzzles, instructions, hints, and answers. You can choose from six levels of difficulty: easy, intermediate, challenging, tough, super tough, and infernal. You can also customize the size and layout of your puzzles.</.

Printable Sudokus: Free Service of Generating PDF Files with Sudokus

Printable Sudokus is a website that offers a free service of generating PDF files with sudokus. You can choose from four levels of difficulty: easy, medium, hard, and very hard. You can also select the number of puzzles per page, the number of pages, and the paper size. The website will create a PDF file with the puzzles and the solutions that you can download and print.

How to Solve Sudoku Puzzles Faster and Easier

Solving sudoku puzzles can be a rewarding and satisfying experience, but it can also be frustrating and time-consuming if you don't know how to approach them. Here are some of the most common and useful techniques that can help you solve sudoku puzzles faster and easier:

The Scanning Technique: The Easiest Way to a Sudoku Solution

The scanning technique is the easiest and most basic way to solve sudoku puzzles. It involves looking for rows, columns, or boxes that have only one possible candidate for a given cell. This can be done by eliminating the numbers that are already present in the same row, column, or box. For example, if a row has eight numbers filled in, the remaining cell must contain the missing number. Similarly, if a box has seven numbers filled in, and two of them are in the same column as an empty cell, the empty cell must contain the third number that is not in that column.

The Pencil Marking Technique: A Systematic Sudoku Solver Strategy

The pencil marking technique is a systematic sudoku solver strategy that involves writing down the possible candidates for each cell in small numbers. This can help you keep track of the options and eliminate them as you progress. There are different ways to do pencil marking, but one of the most common ones is to use the corners of the cells. For example, if a cell can be either 1, 2, or 3, you can write those numbers in the top-left corner of the cell. As you scan the grid and find more clues, you can erase the candidates that are no longer valid.

The Cross-Hatching and Penciling In Techniques: Useful Tips for Beginners

The cross-hatching and penciling in techniques are useful tips for beginners who want to solve sudoku puzzles more easily. The cross-hatching technique involves looking at a single box and eliminating the numbers that are already present in its corresponding row or column. For example, if a box has a 1 in its top row, you can cross out the 1s in the other two rows of that box. The penciling in technique involves looking at a single number and filling in the cells where it can only go in one place. For example, if a number can only go in one cell in a box, you can pencil it in that cell.

Conclusion

Sudoku is a fun and challenging game that can improve your brain function and prevent cognitive decline. If you want to enjoy sudoku puzzles online, you can find many websites that offer free sudoku books in PDF format that you can download and print. Some of the best ones are Kaidoku, Sudoku Printables by Krazydad, and Printable Sudokus. To solve sudoku puzzles faster and easier, you can use some of the techniques we discussed, such as scanning, pencil marking, cross-hatching, and penciling in. We hope this article helped you learn more about sudoku and how to play it.

FAQs

Q: How many solutions does a sudoku puzzle have?
A: A valid sudoku puzzle has only one unique solution.
Q: How hard is it to solve a sudoku puzzle?
A: The difficulty of a sudoku puzzle depends on several factors, such as the number and distribution of given clues, the level of logic required to deduce the solution, and the personal skill and experience of the solver.
Q: How long does it take to solve a sudoku puzzle?
A: The time it takes to solve a sudoku puzzle varies depending on the difficulty of the puzzle and the speed and accuracy of the solver. Some easy puzzles can be solved in less than 5 minutes, while some hard puzzles can take more than 30 minutes.
Q: What is the world record for solving a sudoku puzzle?
A: The world record for solving a sudoku puzzle is 1 minute 23 seconds by Jan Mrozowski from Poland in 2009.
Q: What are some other types of sudoku puzzles?
A: There are many variations of sudoku puzzles that have different rules or features. Some of the most common ones are: - Killer sudoku: A sudoku puzzle with regions that have a sum clue. The numbers in each region must add up to the given sum. - Samurai sudoku: A sudoku puzzle that consists of five overlapping 9x9 grids. The rules are the same as standard sudoku, but the puzzle is larger and more complex. - Jigsaw sudoku: A sudoku puzzle that has irregularly shaped boxes instead of 3x3 ones. The rules are the same as standard sudoku, but the puzzle is more challenging. - Wordoku: A sudoku puzzle that uses letters instead of numbers. The rules are the same as standard sudoku, but the puzzle also forms a word or a phrase when solved.

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