The Sudoku Essentials Blog is my mini-journal about Sudoku. It…
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Sudoku Solver Program
Sudoku Puzzle Solver Algorithm-Driven Program and Computer There are several good puzzle solvers online and available, but most of them implement only a few solution-seeking algorithms and then fall back
Play Sudoku On Your PC
Free Online Sudoku Levels include kids, easy, medium, hard, and evil Solve the free online sudoku puzzle by filling in the empty cells with a single number (from all the
Why Is A Sudoku Puzzle Addictive?
It is hard to explain. A Sudoku puzzle is addictive! My wife and I just love to solve them. Apparently we aren’t alone. The demand is growing. What is it
Have You Tried A 12×12 Sudoku Puzzle Called Stars & Stripes Sudoku?
It is a 12×12 Sudoku puzzle with a twist. Here is the scoop. A typical 12×12 Sudoku puzzle puts the numbers 1 through 9 plus A,B,C in every row, column,
Sudoku Easy To Very Hard 105 Addictive Sudoku Puzzles
“Sudoku Easy To Very Hard 105 Addictive Sudoku Puzzles” is ready for you to download and solve. It will give you hours of brain teasing fun! Once you start solving
Fiendish Sudoku! Can You Solve Them?
Fiendish Sudoku – 200 Challenging Sudoku Puzzles has 200 very difficult printable puzzles that you can download today. This eBook is not for beginners. I’ll bet you can’t solve these
Sudoku Match – The platform for Sudoku mashup games
by Brad Smith Sudoku Match Vol. 1 The Black series is a mashup of Sudoku and Word search. Complete the Sudoku grid to find the solution row or column. Use
Math
by Rick Yakubisin(Greensburg, PA) Any row, column or grid. Pick a candidate and count how many the chosen candidate is in the row, column or grid. Count the cells that
Sudoku Puzzle — Boxout Pattern
by Ed GLysson(Morgan Hill, CA) Sudoku Puzzle — Boxout Pattern A true Sudoku Puzzle must be resolvable to only one solution. A Boxout Pattern is a Sudoku Puzzle condition to
Sudoku Puzzle — Shuffle 288
by Ed Glysson(Morgan Hill, CA) Sudoku Puzzle — Shuffle 288 Introduction: This article describes and demonstrates how the entries in a single Sudoku puzzle can be shuffled to create 288
Sudoku Puzzle Triplets — Identifying and Understanding
by Ed GLysson(Morgan Hill, CA) Sudoku Puzzle; Identifying and Understanding Triplets: The “Sudoku Puzzle — Triplets” example attached can be used as a visual aid to promote the the identification
Sudoku Square and Space Notation
by Ed Glysson(Morgan Hill, CA.) Sudoku Square and Space Notation As we know, a Sudoku Puzzle Template is a 9×9 matrix of 81 Spaces, which are initially all empty. These
Sudoku – 54 Clues in 5 Minutes
by Ed Glysson(Morgan Hill, CA.) Sudoku –54 Clues in Five Minutes This methodology is easy to utilize, but the explanation is wordy so stay with me. Start the Clock! There
Sudoku Puzzling Materials
by Ed Glysson(Morgan Hill, CA.) Sudoku Puzzling Materials OK… So, minimally all one needs is a puzzle and a pencil (or pen) and it’s “Game On!”. But some Sudoku puzzles
Mirror Readoku – A Sudoku Twist
by Dr. Shelagh Robinson Psychologist, OPQ(Montreal, Quebec, Canada) Fast, focused, head-to-head Sudoku action. Timed, of course – the pace is competitive. Bragging rights are up for the puzzler who finds
Related Values Chaining
by Cliff McQuesten(Florida panhandle) Related Values Chaining extends xy-chaining to analyze row-, column- and box- interactions between chain links and cells that are not part of the chain. A group
The Intersecting Value
by John(Wisconsin. USA) If in a given row a certain number is determined to reside in a certain 3×3 block; and furthermore, that same number for a given column must
Be The Master Of Evergreen Game – Sudoku Puzzle
by Sunny Patel(Ahmedabad, India) So exactly what is Sudoku puzzle game? It is a number placement brainteaser, which calls for you to tap into your reasoning skills. Patience is also
Find Naked and Hidden Singles and Pairs First
by Bob(Auburn, MA, USA) After first pass through clues Yes, everyone says to do that, but no one explains how to do it systematically. Here is how I do it:
Chain
To use the chain strategy, pick a box with only 2 candidates that you would like to solve. Now imagine that the answer to that box is the first candidate.
All Candidacies of # w/in Region Alligned =
Though likely written somewhere in this site already: Two or three of the same candidate forming a line in a region eliminates that candidate as a possibility for the rest
Row of 3
by RFTredwell(Orono, Maine, USA) Suppose you have solved three cells in a row (or column) within a region. (Rows with letters, from top; columns with numbers from left.) For instance,
Using Colors
by Mohammed Hajooze(Aleppo Syria) First I use Orange to mark the start of color mapping, in this example the candidate is (1). Find a column or row where the candidate
Rule of Two
by Cynthia Wilson(White Sulphur Springs MT USA) For difficult puzzles, I’ve adopted what I call the Rule of Two. Simply put: no cell should ever have more than two numbers
Not In My Hood (3×3 Square) – or – The Reject List
by Claude W Smith(San Diego, CA) Recently, My wife asked me to find a computer program so that she could play the game on her home computer. As her computer
Check Empty Cells In A Row Or Column By Process Of Elimination
by JimNC9(NC) If a row has three empty cells, look at the columns of the empty cells of that row. If either column contains two of the three missing numbers,
Dots
by Colleen Atradley(lkwd, co usa) In the cell I put a dot for 1 2 3 4 5 6 7 8 9 When I look at a cell a know
The Numbers In Order
(Dubuque, Iowa, USA) I am not 100% sure this is the way to go, but look at the square. Is there a 1? If there is not, then look at
Easy Two Number Referencing
Whenever you have only 2 candidates in your cell, look for couples, triples and quads that go with that cell. When writing the candidates in your cells, write the 2
Forbidden Double X-wing
by Marijn van Bijlert(Oosterbeek, Netherlands) When you see in two 3*3 squares a pattern that looks almost a double X-wing, you are certain a double X-wing there is forbidden because
The Ninth Number Of The Grid
by Victor(Moncton, Canada) When you have 8 of the same number in any combination of 8 of the 9 by 9 squares, you can always put the ninth number using
Process of elimination using Dots instead of Numbers
Process of elimination using Dots instead of Numbers. When you are putting possible numbers that can be in a square. Use Dots instead. No need to use a Rubber.Use a
Coupled Pairs
by Robert Benson(San Diego, CA, USA) While I use all the methods you give, one of my favorites (which I have not seen in print yet) is to use “coupled
Solving Sudoku Puzzles
by LESLIE MUTCHLER(EVERETT, WASHINGTON,USA) LABELING Across the top label the large squares A, B, C and down the left side D, E, F. Generally the bottom and right side don’t
My Visual Sudoku Strategy
by Elaine(Midwest, USA) I like Sudoku strategies that are simple and logical for me. I like solving Sudoku puzzles without using candidates, if at all possible. In reality, eventually you
Is Sudoku Works 4 Kids ™ The Kid Sudoku Program You Are Looking For?
Sudoku Works 4 Kids ™ is a computer Sudoku program for kids. This program is ideal for children to learn logic skills while playing a fun game of Sudoku. This
Is Web Sudoku Deluxe Worth Downloading?
Read this critical review on Web Sudoku Deluxe and then decide for yourself. A short while ago, one of my SudokuEssential.com visitors emailed me and asked me if I had
Don’t Download or Buy Sudoku Works ™ Until You Read My Critical Review!
Discover the truth about Sudoku Works ™! I downloaded this Sudoku Game, I played it, and now I can tell you what you need to know. Read this critical review
My Favorite Sudoku Puzzle Books
One thing about Sudoku Puzzles, they are addictive! Sudoku puzzle books are rolling off the presses to satisfy that addiction. You now have many puzzle books to choose from. Maybe
“What Is The Best Sudoku Handheld Game?”
Looking to buy an electronic Sudoku handheld game? Beware! Look before you leap. Pictures in online catalogs can be deceiving. I know, I bought the “Do You Sudoku™” handheld electronic
Don’t Download or Buy Sudoku Dragon ™ Until You Read My Critical Review!
Sudoku Dragon Review Discover the truth about Sudoku Dragon™! I downloaded this Sudoku Game, I played it, and now I can tell you what I liked and disliked about it.
Sudoku The Board Game Creates Family Fun
Sudoku The Board Game brings 1 to 4 friends together to solve a challenging and addictive Sudoku puzzle. Using simple logic and reasoning, players compete against each other to solve
Du-KO A New Sudoku Board Game That The Whole Family Can Play!
Du-KO Sudoku Board Game Review Du-KO is a new Sudoku board game for 2011. What was once an individual game, now can be played by 1 to 9 players, ages
Simple Sudoku – My Favorite Sudoku Game and Sudoku Puzzle Solver
I downloaded Simple Sudoku , I played it, and now I can tell you what I liked and disliked about it. Read this review and then decide if this Sudoku game is
Programming Sudoku
How to Program Sudoku Programming Sudoku is a challenge for computer programmers. Could a little advice help you in creating your next masterpiece? Several programmers have contacted me in the
Is Pappocom Sudoku The Right Sudoku Game For You?
I bought Pappocom Sudoku, I played it, and now I can tell you all about it. Read this review and then decide if this Sudoku game is for you. Pappocom
Do You Sudoku?™ Handheld Electronic Game Review
Do You Sudoku ?™ the electronic Sudoku handheld game is an attractive looking game. That was my first impression of the Amazon.com online catalog picture. The product description for this
Sudoku XY-Wing Solves Difficult Sudoku Puzzles
Sudoku XY-Wing Explained A Sudoku XY-Wing pattern occurs in many of the more difficult Sudoku puzzles. Your ability to identify and solve this pattern will often break the logjam and
Sudoku Directions For Solving XY-Wing
Many people have asked me for step-by-step Sudoku directions for solving XY-Wing example number 1. If you have been puzzled about how I solved this puzzle, read this article. It seems
How To Solve Sudoku X-Wing
Sudoku X-Wing Explained Many people have asked me how to solve Sudoku X-Wing, which is a very hard Sudoku puzzle pattern to identify and solve. Here is a step-by-step explanation
Solve Sudoku Swordfish and Become a Pro
Sudoku Swordfish Sudoku Swordfish is a powerful technique used to solve some very hard Sudoku puzzles. Not every difficult Sudoku puzzle will have this pattern. You will need to know
Take These Steps To Solve Sudoku Swordfish
If you have been puzzled about how to solve Sudoku very hard puzzle #2, read this article. I will take you step by step so you can arrive at the starting position
How To Identify Sudoku X-Wing Pattern
Sudoku X-Wing Tutorial A Sudoku X-Wing pattern occurs in many of the more difficult Sudoku puzzles. Your ability to identify and solve this pattern will often break the logjam and
Would An Effective Sudoku Strategy Help You Solve Your Sudoku Puzzle?
Solve Sudoku Without Guessing In this article you will learn how to apply a simple Sudoku strategy that will help you solve Sudoku puzzles. Additional advanced strategies are described in
Share Your Sudoku Strategies!
What Is Your Favorite Sudoku Strategy? Do you have a great Sudoku strategy? Share it! Write a 300 word article that explains your strategy. Use proper English and sentence structure.
Sudoku Hints To Logically Solve Sudoku
Sudoku Hints for all Levels Would you like better ways to solve Sudoku? Try these Sudoku hints. It is best to approach solving a Sudoku puzzle in a systematic way.
Which Sudoku Game Is Best For You?
Picking the perfect Sudoku game is difficult. There are many excellent games from which to choose. You have Sudoku Dragon™, Sudoku Works, Pappocom Sudoku, Simple Sudoku, and many others. I bought them,
Sudoku Rules Are Simple
How to Play Sudoku It’s the solution that’s the challenge. Here are the illustrated Sudoku rules. The Sudoku Rules Rows There are 9 rows in a traditional Sudoku puzzle. Every
A Snapshot History Of Sudoku Puzzles
The history of Sudoku puzzles likely has it roots in the mathematical concept of Latin Squares. Leonhard Euler, a Swiss mathematician, in the 1780’s developed the idea of arranging numbers
Ever Wonder How Grading Sudoku Puzzles Is Done?
Grading Sudoku Puzzles is very subjective. It differs from puzzle maker to puzzle maker. My research has revealed what Sudoku patterns you are likely to find in different grades of
How To Create Sudoku Puzzles Revealed!
Create Sudoku Game Easily I hesitate to tell you how to create Sudoku puzzles for yourself. You may never visit Sudoku Essentials again. That will make me sad. Then again,
Take the Sudoku Brain Teaser Challenge!
Sudoku is the greatest brain teaser. Love logic? Try it! It’s addictive! Who would have thought that solving a Sudoku puzzle by placing the numbers 1 through 9 in a
Are You Looking For Free Blank Sudoku Grids?
Blank Sudoku Printable Look no farther. I have them online ready for you to print. Try my special blank Sudoku grid with candidates worksheet. It will help you solve Sudoku
Want To Know How To Play Sudoku? I will show you how!
It is Easy to Learn How to Play Sudoku My easy to understand illustrated techniques teach you how to play Sudoku puzzles. In several articles, (just too much to show
Try My Sudoku Tips And Become A Better Sudoku Solver!
Sudoku Tips to Make you an Expert Would some Sudoku tips help you turn from an amateur to a professional puzzle solver? Use these Sudoku hints and strategies to solve
Learn How To Solve Sudoku Puzzles And Never Be Stumped Again!
Learning how to solve Sudoku puzzles requires applying logic. There are over thirty Sudoku techniques you need to know in order to solve all Sudoku puzzles from easy to fiendish.
Sudoku Puzzle Solver Solves Your Puzzle Instantly
Sudoku Solver Review Use a Sudoku solver to solve your most difficult sudoku puzzle instantly! You have several Sudoku solvers from which to pick. I reviewed several Sudoku programs to
Free Sudoku Worksheet
Download this free Sudoku worksheet to help you solve all of your Sudoku puzzles. This handy Sudoku Excel template will allow you to enter and remove candidates for each cell.
Solve Hard Sudoku Puzzles In Less Time Using The Links Method
Solving Hard Sudoku – Links Method Solving hard Sudoku puzzles challenge the skills of Sudoku solvers. Many solvers pencil in candidates and look for common patterns in their puzzles. When
Medium Sudoku Puzzles
You have come to the preferred source of medium Sudoku puzzles. Sudoku Essentials assures you of quality printable Sudoku puzzles in PDF format. My large print Sudoku puzzles are handcrafted
Easy Sudoku Puzzles! Ready For You To Solve!
Sudoku Puzzles for Beginners Want to learn more about easy Sudoku puzzles? Here is the place to start. I have handcrafted these easy Sudoku puzzles for your enjoyment. All of
Want Free Sudoku Puzzles?
Play Free Sudoku Games Look no farther. I have free Sudoku puzzles. They come in five grades easy, medium, hard, very hard, and fiendish (you might even say diabolical) puzzles.
Want Sudoku Puzzles To Print?
You will find over 350 Sudoku puzzles to print here at Sudoku Essentials. Plus you have four new puzzles daily at our online game Sudoku Savant. You will love our
Free Sudoku For Kids Puzzles
Kids Sukoku Puzzles Our free printable Sudoku for kids puzzles are designed for kids of all ages. Why should adults have all the fun? What better way could you teach kids logical
Addictive Printable Sudoku Books Ready For You To Download And Solve!
Looking for printable Sudoku books? You have come to the right place! Sudoku Essentials has finally created two Sudoku eBooks. Check this page regularly to find our latest creations. More
Looking For Printable Sudoku Puzzles?
You will find them here. There is something about printable Sudoku puzzles. You can take them with you where ever you go. Sit in your easy chair, solve them on