Sudoku Hardest

The Finnish brainbox's latest version of the number grid puzzle is designed to bamboozle fans. Sudoku is a logic based number placement game that was invented in the US, then popularized in Japan before spreading to the rest of the world. Sudoku puzzles (Su Doku) My database includes 6913752 puzzles for the moment and I'm constantly generating more. To quote the author of the puzzle:. One reason that my puzzle may be 'unsolvable' is that at some stage an incorrect allocation has been made. Fill the grid so that every row, every column and every 3x3 box contains the numbers 1 to 9 Published: 7:01 PM. Navigate the grid with the arrow keys or your mouse; clear. It became really popular in Japan in the 1980s and in the UK since late 2004. You can switch between the two methods any time you like, and can use a combination of both. There are two ways to approach the Sudoku Solving process. The digits within the cells joined by grey lines add up to the printed top left-hand figure. When utilizing these techniques, the way the pros prefer to do it, is to start with the basic ones. Solving a hard Sudoku puzzle will require quite a different set of techniques compared to an easy one. Hard printable samurai sudoku puzzles. Solve Solves the current Sudoku. This solver offers a number of features to help you improve your solving skills and practice solving strategies. The objective is to fill in the 9x9 grid so that each column, each row, and each of the nine 3x3 boxes (or regions) contains the digits from 1 to 9 only one time each. Offers thousands of free graded puzzles. I have put up screen shots of the steps and a quick explanation of the method at World's Hardest Sudoku. If you ever get around to some Killer Sudoku, or Jigsaw Sudoku, please let me know. JigSawDoku Variations Download. Validate Checks if all entered numbers are correct. There are three difficulty levels to choose from depending on your skill level: easy for beginners, medium for intermediates and hard for experts. A Sudoku XY-Wing pattern occurs in many of the more difficult Sudoku puzzles. Sudoku puzzles are generated on the server using proprietary Python code. These printable sudoku puzzles range from easy to hard, including completely evil puzzles that will have you really sweating for a solution (They're solvable, I promise. Every row must contain one of each digit. Sudoku Island. Quick Cross A speedy crossword challenge. Though the puzzle originated in China, the name, How to Solve Very Hard Sudoku Puzzles | Our Pastimes. sudokupuzzle. Clicking 'Hint' will automatically add one more number to the playing board. Easy Medium Hard Evil. Play Offline with Web Sudoku Deluxe. sudoku 9981 provides a lot of printable sudoku puzzles in easy, standard,hard,expert and extreme levels. There are 5 difficulty levels, sudoku for kids,easy,hard,expert and extreme sudoku puzzles. Guessing is not required. Clicking 'Hint' will automatically add one more number to the playing board. The rules are quite simple, actually. The objective is to fill in the 9x9 grid so that each column, each row, and each of the nine 3x3 boxes (or regions) contains the digits from 1 to 9 only one time each. Word Round Up A challenging blend of crossword and word find. It is now quickly spreading worldwide. On our homepage you have the possibility to print Sudoku's in all levels (including solutions). This site contains a lot of printable sudoku puzzles. And even with all the techniques discussed here, Sudoku Assistant cannot solve this puzzle. Sudoku Weeklyz - Your Online Source For Free Weekly Sudoku Puzzles. 13 regions (four regions overlap with the nine standard regions). Also provides daily Sudoku, blank grid and touch screen friendly versions. A number may only appear once in a single row, column or three-by-three box. Remember that 'Auto-pencil marks' will not auto-run. To quote the author of the puzzle:. Helps you to improve your solving skills and practice solving strategies. Sudoku puzzles may be described as an exact cover problem. Sudoku and Sudoku puzzle is a fun puzzle is to enter a number from 1 through 9 in each cell of a Sudoku grid, most frequently a 9×9 grid made up of 3×3 subgrids. The above Sudoku puzzle is classified as easy; I can finish it in under a minute without even writing down possibilities. Every Sudoku has a unique solution that can be reached logically. Welcome to the Daily Jigsaw Sudoku Competition. Sudoku Saviour is designed as an online sudoku solver. Every row must contain one of each digit. com - fun and packed with helpful features. The rules are quite simple, actually. This website can be used to solve easy, medium or hard sudoku puzzles by simply entering your sudoku puzzle into the playing board on the homepage. Pic-a-Pix Fill-a-Pix Hashi CalcuDoku. Play hard level Sudoku online on Sudoku. Add and remove "pencil marks" by holding down the or key. With our Sudoku puzzle app, you can not only enjoy sudoku games anytime anywhere, but also learn Sudoku techniques from it. net for more printable sudoku puzzles. 9x9: easy intermediate hard challenging expert Sudoku is a logic based number placement puzzle. Very difficult sudoku puzzles to print or play online. Your ability to identify and solve this pattern will often break the logjam and lead you to the solution of a challenging Sudoku game. Easy Medium Hard Evil. Play Offline with Web Sudoku Deluxe Download for Windows and Mac. Never solved sudoku puzzles before? Read the guide on how to play. A standard Sudoku puzzle consists of a grid of 9 Blocks. JigSawDoku Variations Download. Every day a sudoku is generated for you to solve. Now you've played sudoku of the day online, aren't you intrigued as to how this highly addictive puzzle came about. Japan is known for introducing the best online games and PC games. The rules for solving Sudoku puzzles are very simple: each row, column and block must contain one of the numbers from "1" to "9". As stimulated by the normal Sudoku game, only one solution is provided for each sudoku puzzle. Difficult sudoku puzzles to print or play online. From a large number of highest rated puzzles at Calcudoku. com W Sudoku provides you different kind of Sudoku puzzles from easy to hard plus world sudoku championship puzzles. Easy Medium Hard Evil. Infact, Sudoku game has been loved by most online game players. Enter numbers into the blank spaces so that each row, column and 3x3 box contains the numbers 1 to 9 without repeats. More details on the features of free accounts and full accounts are available here. com - fun and packed with helpful features. Each puzzle has a unique solution and can be solved with pure logic. 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. In truth, Sudoku puzzles are very well structured and predictable - much like mathematics. The general rule with sudoku puzzles is that as the number of starting clues in the puzzle goes down, the difficulty in solving the puzzle goes up. Sudoku 4,401 hard. You can create puzzles using either shapes or numbers, and your grids can be 4x4, 6x6, or 9x9. Navigate the grid with the arrow keys or your mouse; clear. This puzzle is exactly the same as a normal Sudoku - fill in the rows and columns and boxes with 1 to 9 without the same number appearing in any row, column or box. Sudoku Puzzles: Hard The modern version of Sudoku was invented in 1979 by Howard Garns in USA (where it was called `Number Place'). All too often I try to solve a Sudoku and end up believing it is impossible to solve and give up. There are two ways to approach the Sudoku Solving process. You are currently on the page to make our Legacy Sudoku Puzzles. This advanced logic is only for the most seasoned sudoku players who enjoy long, extremely advanced games which employ a lot of outside the box sudoku thinking. JigSawDoku Variations Download. Fill the grid with your keyboard so that every row, column and 3×3 box contains the digits 1 to 9, without repeating. I have put up screen shots of the steps and a quick explanation of the method at World's Hardest Sudoku. Download for Windows or Mac OS X. The word Sudoku is an abbreviation of a phrase which means "the digits must occur only once". Only use the answer keys as a last resort when trying to solve the puzzles. Solves any valid sudoku puzzle. Free printable Sudokus! PrintMySudoku. We believe that games should be free for everyone to enjoy, and ads help us achieve this goal. How to Play. Easy Sudoku for Tue 20/Aug/2019. Hard sudoku puzzles, 4 puzzles per page. Sudoku and Sudoku puzzle is a fun puzzle is to enter a number from 1 through 9 in each cell of a Sudoku grid, most frequently a 9×9 grid made up of 3×3 subgrids. Specific BrainBashers Sudoku. World's hardest sudoku: the answer Here is the answer to the world's hardest sudoku, devised by Finnish mathematician Arto Inkala. Though the puzzle originated in China, the name, How to Solve Very Hard Sudoku Puzzles | Our Pastimes. Play Sudoku - Play this fantastic puzzle game that is taking the world by storm!!. This website is dedicated to providing quality Sudoku puzzles online and free of charge. According to The Guardian "The government-backed Teachers magazine has recommended Sudoku as brain exercise in classrooms. More Extreme Sudoku is the second volume in the Extreme Sudoku series of Sudoku puzzle books acclaimed for their especially challenging puzzles. com provides free sudokus. I have put up screen shots of the steps and a quick explanation of the method at World's Hardest Sudoku. Bookmark this page to play a new game of Sudoku every day! Shop for Sudoku merchandise at our store. Rules: Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. Suitable for all grades, Sudoku lets you fill in each row, column, & region with a unique number. Pic-a-Pix Fill-a-Pix Hashi CalcuDoku. Your game was paused due to inactivity x We noticed that you are using an ad blocker. Just place the digits from 1 to 9 in each empty cell. The document is in pdf format. So must every column, as must every 3x3 square. Play free online Sudoku puzzles (very hard) with pencil mark and coloring options. The goal is to fill in all the empty cells on the board with the correct numbers. Microsoft Sudoku is the classic game you love, with a modern look and feel and exciting new features. Very hard Sudoku printables were made with printing in mind. Sudoku at Cool Math Games: This is your standard Sudoku game. First enter the numbers of the sudoku directly in the grid or enter them via the "Load" and "Seed" buttons. These printable sudoku puzzles range from easy to hard, including completely evil puzzles that will have you really sweating for a solution (They're solvable, I promise. The hard part lies in solving the puzzle! A sudoku puzzle consists of a 9 by 9 grid. com, also you can print sudoku puzzles without any ads. It is now quickly spreading worldwide. Every Sudoku has a unique solution that can be reached logically. This puzzle is exactly the same as a normal Sudoku - fill in the rows and columns and boxes with 1 to 9 without the same number appearing in any row, column or box. Fill in the blanks so that each row, each column, and each of the nine 3x3 grids contain one instance of each of the numbers 1 through 9. You can print these Sudoku to solve on paper, or play on your Phone or Tablet to solve on the go! Daily Puzzle Archive If you missed any of the Daily Puzzles, here's an archive of the most recent puzzles so you can catch up at your leisure!. Sudoku Puzzles: Medium The modern version of Sudoku was invented in 1979 by Howard Garns in USA (where it was called `Number Place'). net for more printable sudoku puzzles. Also provides daily Sudoku, blank grid and touch screen friendly versions. The Finnish brainbox's latest version of the number grid puzzle is designed to bamboozle fans. Sudoku #045051 Random level 0 - beginner 1 - easy 2 - normal 3 - intermediate 4 - strong 5 - serious 6 - difficult 7 - very hard 8 - champion 9 - evil 10 - samurai Each Sudoku has a unique solution that can be reached logically without guessing. The main difference in the X-Sudoku is that you can not repeat numbers in either of the two main diagonals of the grid that you will see marked in orange. Play Sudoku - Play this fantastic puzzle game that is taking the world by storm!!. Play hard online sudoku on the web. Sudoku puzzle boards can be created in all different sizes. So must every column, as must every 3x3 square. The hard part lies in solving the puzzle! A sudoku puzzle consists of a 9 by 9 grid. What is Sudoku? A Sudoku puzzle is defined as a logic-based, number-placement puzzle. Sudoku is a game of pure logical deduction, where no guessing is ever required in the puzzle game. Sudoku, also called Number Place, is a widespread riddle throughout the world. Solving a hard Sudoku puzzle will require quite a different set of techniques compared to an easy one. Numbers within the grey line boundaries cannot be repeated. With our Sudoku puzzle app, you can not only enjoy sudoku games anytime anywhere, but also learn Sudoku techniques from it. We recommend using a A4 paper. Sudoku 4,401 hard. Enter your email and our daily headlines will be delivered to your inbox each morning. JigSawDoku Variations Download. Playing Sudoku online, with solver, forum and ebooks. Note: we're still tuning up the gameplay so if you feel something's wrong or would like some feature added, just let us know. Fill the grid so that every row, every column and every 3x3 box contains the numbers 1 to 9 Published: 7:01 PM. The game acquired its present form, however, only in the 70s of the 20th century, when American Howard Garns revised and published it in a special printed edition. 16 Sudoku puzzles that you can print each day! 4 puzzles are printed on one page. This grid is subdivided into nine 3 x 3 boxes. Interactive Sudoku Solver Our new interactive Sudoku Solver will take you step by step through the process of solving a Sudoku puzzle using up to 36 different methods. Japan is known for introducing the best online games and PC games. Navigate the grid with the arrow keys or your mouse; clear. com provides free sudokus. Bookmark this page to play a new game of Sudoku every day! Shop for Sudoku merchandise at our store. About 1,449 results for Sudoku hard. Insane sudoku are the hardest sudoku I offer. Sudoku puzzle boards can be created in all different sizes. Each Sudoku has a unique solution that can be reached logically without guessing. Select a puzzle from this list if you are an experienced sudoku player All the puzzles in this page are rated difficult. Pic-a-Pix Fill-a-Pix Hashi CalcuDoku. It's fun and challenging for all ages. This basic elimination method is generally the last thing you would be doing for intermediate and advanced puzzles. About 1,449 results for Sudoku + Sudoku hard. Our free web sudoku puzzles follow in the same tradition, enabling you to play Sudoku 24/7! From easy to medium to hard puzzles, we have you covered with our comprehensive collection of best-in-class online sudoku puzzles. Click on Take Step to step through the solution. Play Sudoku - Play this fantastic puzzle game that is taking the world by storm!!. Fill the grid so that every row, every column and every 3x3 box contains the numbers 1 to 9 Published: 7:01 PM. Printable Sudoku Puzzles (Daily update) This website will provide you printable sudoku puzzles, we daily update including solutions. Play today for free!. Just click & print. Sudoku is a logic based number placement game that was invented in the US, then popularized in Japan before spreading to the rest of the world. We hope you find our puzzles challenging yet appropriately solvable, and that the site appearance is beautifully simple. Play Offline with Web Sudoku Deluxe Download for Windows and Mac. I find these puzzles to be really difficult, but I LOVE this one because it lets me ask for hints! Gives a new puzzle each time too. Today's Variation JigSawDoku. There are two ways to approach the Sudoku Solving process. All too often I try to solve a Sudoku and end up believing it is impossible to solve and give up. SuDoku Archive for October 2012. Our daily difficult web sudoku puzzles are suitable for people, who possess an excellent knowledge of sudoku game and know how to build a proper strategy to get a right solution in short terms. Numbers within the grey line boundaries cannot be repeated. All our grills are hard sudoku game with a single solution. You can print sudoku free, with 4 or 6 puzzles per page. The rules to play Sudoku are quite simple. Download our Sudoku puzzle solver for a free 23 day trial. In all regions, the numbers from 1 to 9 can appear only once. 9x9: easy intermediate hard challenging expert Sudoku is a logic based number placement puzzle. This allows for an elegant description of the problem and an efficient solution. 24/7 Games has a full line of Sudoku games. Play hard online sudoku on the web. There are a lot of sudoku puzzles for download. *FREE* shipping on qualifying offers. Play Offline with Web Sudoku Deluxe Download for Windows and Mac. A new sudoku every minute!. Solves any valid sudoku puzzle. Features:- 300 sudoku from Will Shortz to enjoy over the. Sudoku 4,401 hard. Key Features 💪Sudoku puzzles come in 4 difficulty levels - easy Sudoku, medium Sudoku, hard Sudoku and expert Sudoku!. Japan is known for introducing the best online games and PC games. Quick Cross A speedy crossword challenge. Offers thousands of free graded puzzles. Be prepared to spend time on these crazily tough puzzles. Every day a sudoku is generated for you to solve. Unolingo A challenging blend of crossword and sudoku that tests logic and deductive reasoning. Shop with confidence. Very hard Sudoku printables were made with printing in mind. Sudoku puzzles (Su Doku) My database includes 6913752 puzzles for the moment and I'm constantly generating more. A Sudoku XY-Wing pattern occurs in many of the more difficult Sudoku puzzles. More than that you. Each block is divided into its own matrix of nine cells. Learn how to solve Sudoku and other puzzles Whether you are just starting or a seasoned expert, there will always be something for you on this site. Enter numbers into the blank spaces so that each row, column and 3x3 box contains the numbers 1 to 9 without repeats. Play hard online sudoku on the web. 24/7 Sudoku's Expert Sudoku is going to requre much more advanced technique to solve than in previous puzzles on the site. Pic-a-Pix Fill-a-Pix Hashi CalcuDoku. In my opinion, it is THE BEST on-line Sudoku, and better than many of the printed ones in Sudoku pubs. Up & Down Words Use crossword-style clues to fill in two-word phrases. On this page, you will find everything you need to customize all of your Sudoku puzzles for your classroom. jones_supa writes "A Finnish PhD in mathematics, Arto Inkala, has allegedly created the world's toughest sudoku puzzle. Printable free hard sudoku puzzles,Need some advanced sudoku strategies,Such as Wings, Subsets. One reason that my puzzle may be 'unsolvable' is that at some stage an incorrect allocation has been made. Key Features 💪Sudoku puzzles come in 4 difficulty levels - easy Sudoku, medium Sudoku, hard Sudoku and expert Sudoku!. Print sudoku for free. Clicking 'Hint' will automatically add one more number to the playing board. Modelling Sudoku as an exact cover problem and using an algorithm such as dancing links will typically solve a Sudoku in a few milliseconds. Sudoku is a logic puzzle that involves plugging numbers into blocks in a grid system in order to fill every empty spot without repeating numbers. Many newspapers now include a daily sudoku puzzle (if you can't wait to check your answer, try our sudoku solver). Get your daily online Sudoku puzzle only in The Washington Times. Pic-a-Pix Fill-a-Pix Hashi CalcuDoku. You cannot receive a refund if you have placed a ShippingPass-eligible order. More than that you. Hard Sudoku by www. The assistant can be started with a specific BrainBashers Sudoku (each of which has a unique number). This grid is subdivided into nine 3 x 3 boxes. Sudoku puzzles are generated on the server using proprietary Python code. 13 regions (four regions overlap with the nine standard regions). Nine teams of nine players (with one celebrity in each team) representing geographical regions competed to solve a puzzle. Guessing is not required. 24/7 Sudoku's Expert Sudoku is going to requre much more advanced technique to solve than in previous puzzles on the site. Sudoku: That's how it's done. Here you can play online puzzles, ranging from very easy to very hard, find Printable Sudoku Boards and a powerful Sudoku Solver. The general rule with sudoku puzzles is that as the number of starting clues in the puzzle goes down, the difficulty in solving the puzzle goes up. Here's the World's Hardest Sudoku Finnish mathematician Arto Inkala devised this Sudoku puzzle in 2012, dubbing it the most difficult setup of the puzzle in the world. It turns out to be quite easy (about one page of code for the main idea and two pages for embellishments) using two ideas: constraint propagation and search. Play Offline with Web Sudoku Deluxe Download for Windows and Mac. 9x9: easy intermediate hard challenging expert Sudoku is a logic based number placement puzzle. com Sudoku posts five new puzzles every day. Regular sudoku rules apply with the additional requirement that if a >, <, or = sign appear between two cells (or cages) then the values in the cells (or cages) must obey the relation. 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. We recommend using a A4 paper. This website proposes daily a new sudoku puzzle and various possibilities : print games and play online with different levels, colours and notes. The rules are quite simple, actually. Thousands of past puzzles to choose from. Play Offline with Web Sudoku Deluxe. When you have found a square where you can enter a number, click/touch that square. Sudoku Printables Options: You can select a set of two sudoku puzzles/grids from the top dropdown list or you can pick individual sudoku puzzles or blank grids in the dropdowns above each grid. This website is dedicated to providing quality Sudoku puzzles online and free of charge. Since I am only interested in solving hard puzzles by "educated guessing", I found that this sudoku is actually not so hard as advertised (1 level of hypothesis + 1 lookahead = 2 levels of hypotheses). I really enjoy Sudoku Free - I play it several times a day, almost daily. The puzzle below is an extra hard killer sudoku - Fill the grid using the numbers 1 to 9. A sudoku puzzle is a grid of nine by nine squares or cells, that has been subdivided into nine subgrids or "regions" of three by three cells. Sudoku, originally called "number place" is a logical game invented by Swiss mathematician Leonhard Euler in the 18th century. Sign up now!. The above Sudoku puzzle is classified as easy; I can finish it in under a minute without even writing down possibilities. Easy Medium Hard Evil. Sudoku #045051 Random level 0 - beginner 1 - easy 2 - normal 3 - intermediate 4 - strong 5 - serious 6 - difficult 7 - very hard 8 - champion 9 - evil 10 - samurai Each Sudoku has a unique solution that can be reached logically without guessing. Example Puzzles and Solutions The program is supplied with a directory of example puzzles to try. Add and remove "pencil marks" by holding down the or key. org Sudoku #12 7 5 1 4 8 1 4 1 9 7 5 3 8 9 3 6 2 Visit www. Let us know if you like these puzzles and how hard you find them. With our Sudoku puzzle app, you can not only enjoy sudoku games anytime anywhere, but also learn Sudoku techniques from it. org, I measured what percentage of puzzlers solved them on the day they were published. The claim that this is the world's hardest sudoku puzzle was actually made by the author, and popularized by the media. Play hard level Sudoku online on Sudoku. This advanced logic is only for the most seasoned sudoku players who enjoy long, extremely advanced games which employ a lot of outside the box sudoku thinking. Download our Sudoku puzzle solver for a free 23 day trial. According to the Finnish puzzle maker "I called the puzzle AI Escargot, because it looks like a snail. What is Sudoku? A Sudoku puzzle is defined as a logic-based, number-placement puzzle. It turns out to be quite easy (about one page of code for the main idea and two pages for embellishments) using two ideas: constraint propagation and search. If you ever get around to some Killer Sudoku, or Jigsaw Sudoku, please let me know. Play unlimited free Sudoku games online at the level of your choice: easy beginners Sudoku, medium Sudoku, fiendish, evil & difficult Sudoku. Solving a sudoku puzzle can be rather tricky, but the rules of the game are quite simple. Shop with confidence. Regular sudoku rules apply with the additional requirement that if a >, <, or = sign appear between two cells (or cages) then the values in the cells (or cages) must obey the relation. The rules are quite simple, actually. Difficulty. World's Hardest Sudoku 179 Posted by Soulskill on Wednesday July 04, 2012 @04:46AM from the addition-is-tricky dept. If you are confident in solving easy Sudoku puzzles, you are probably ready to learn techniques that will prepare you for other levels of Sudoku: medium, hard, and even expert. The object of Sudoku is to fill in the empty spaces of a 9x9 grid with numbers 1-9 in such a manner that every row, every column and every 3x3 box contains all numbers 1 through 9. Here's how to solve a very difficult Sudoku puzzle from the "Diabolical" section of the puzzle book. We hope you find our puzzles challenging yet appropriately solvable, and that the site appearance is beautifully simple. In other words, the other guys' Hard puzzles are about equivalent to their Medium puzzles. It is the complete Sudoku package, including hints, guides, easy printing and many puzzle generation options. Home Print This Puzzle Sudoku Weekly - 16x16 hard Puzzle for Week of 8/19/2019 : Home - How To. You can switch between the two methods any time you like, and can use a combination of both. Solves any valid sudoku puzzle. 24/7 Sudoku's Expert Sudoku is going to requre much more advanced technique to solve than in previous puzzles on the site. I personally recommend that you do not print a Sudoku solution unless it is a very hard one. It became popular in the early 00's and since then is still a good game for all ages and skills. All the puzzle designs on this site have been created by hand, not computer. Just click & print. The Book of Impossible Sudoku is an ideal gag gift. Solve Solve. It's all done by observation and logic, and the most important thing is to stay 100% accurate at all times. At the end of the month, 3 users will win sudoku kingdom EBook that contains 48 sudoku puzzles with solutions! The winners will be randomly selected from the group of players that score 20 points or more in the daily sudoku ranking!. Play Offline with Web Sudoku Deluxe Download for Windows and Mac. Every Sudoku has a unique solution that can be reached logically. The objective is to fill a 9×9 grid with digits from 1 to 9 following some simple rules. Printable Sudoku Worksheets. An X-Sudoku is solved just like a classic Sudoku by filling the numbers from 1 to 9 into the blank cells. Sudoku History. Here's a summary of the rules of sudoku, in case you've never played before or need a refresher. Very easy sudoku puzzles for kids, 4 puzzles per page. You can switch between the two methods any time you like, and can use a combination of both. Sudoku, or Su-doku, is a Japanese fun puzzle game. Printable Sudoku Puzzles - Rules of Sudoku. Sudoku #045051 Random level 0 - beginner 1 - easy 2 - normal 3 - intermediate 4 - strong 5 - serious 6 - difficult 7 - very hard 8 - champion 9 - evil 10 - samurai Each Sudoku has a unique solution that can be reached logically without guessing. Hardest Sudoku puzzle is a game for experienced Sudoku players with a very high level of difficulty.

Sudoku Hardest