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Algorithmics of sudoku Sudoku puzzles are designed to be solved by human players with pencil and paper but with well defined algorithms , it is possible to be solved in almost real time by computer or even smartphone. A standard Sudoku puzzles contains 81 grids which consists 9 grid rows and 9 grid columns. Sudoku have 9 non- overlapping zones which each zones consists of 3 grid rows and 3 grid columns. Techniques[edit] Backtracking[edit] Backtracking algorithms is adapted to solve the Sudoku that iterates all the possible solutions for the given sudoku. Below is the general pseudocode of backtracking algorithm for standard sudoku template (9x9) [2] Exact cover[edit] Sudoku may be described as an instance of the exact cover problem. Brute-force algorithm[edit] Some hobbyists have developed computer programs that will solve Sudoku puzzles using a brute force algorithm. Advantages of this method are: a solution is guaranteed (as long as the puzzle is valid)solving time is mostly unrelated to degree of difficulty

Finally, a Definition of Programming I Can Actual I believe very strongly that a blog without comments is not a blog. For me, the whole point of this blogging exercise is the many-way communication of the comments -- between me and the commenters, and among the commenters themselves. As I said in How To Advertise on Your Blog Without (Completely) Selling Out: It's an open secret amongst bloggers that the blog comments are often better than the original blog post, and it's because the community collectively knows far more than you or I will ever know. Indeed, the best part of a blog post often begins where the blog post ends. A blog without comments is like Amazon without user reviews. Comments aren't the only form of commentary on a blog post. Of course, as with all other useful things, there is a dark side to comments. I scrutinize every comment, and I remove a tiny percentage of them: they might be outright spam, patently off-topic, or just plain mean. Comments mean additional work for the blog owner.

Sudoku Cel mai dificil Sudoku din lume Un matematician finlandez sustine ca a facut cel mai dificil Sudoku din lume. L-a realizat in trei luni, si are doar o singura solutie. Pentru rezolvarea acestui puzzel, publicat de abcnews.go.com, sunt necesare cateva deductii logice si incercari alternative. Autorul, sustine ca, desi acesta este cel mai greu Sudoku creat pana acum, cu siguranta vor aparea si alte variante chiar mai dificile de atat. Numarul combinatiilor posibile este, practic, infinit, asa inca nu exista un Sudoku care sa nu poata fi rezolvat, desi unele dintre acestea sunt cu adevarat foarte grele. Incearca si tu acest puzzel. Daca te pierzi si esti decis sa abandonezi, sau daca doar vrei sa te verifici, AICI este raspunsul. mai mult Sambata, 30 Iunie 2012, ora 22:05 1 comentariu Slabeste facand Sudoku! Daca te gandeai cum sa slabesti fara sa te ridici din fotoliu, Sudoku sau cuvintele incrucisate reprezinta solutia, pretind cercetatorii. Miercuri, 25 Noiembrie 2009, ora 11:09 2 comentarii

Sudoku Sudoku, pronunțat [sudoku], din japoneză 数, sû, cifră, și 独, doku, unică, este un joc în formă de grilă inventat în 1979 și inspirat de pătratul latin și de problema celor 36 ofițeri a lui Leonhard Euler. Scopul jocului este de a umple această grilă cu cifrele de la 1 la 9 respectând anumite condiții, cu unele cifre fiind de la început dispuse în grilă. Prezentare[modificare | modificare sursă] O grilă 9×9 de Sudoku (apăsaţi pe imagine pentru a vedea soluţia, care apare mai jos) Grila jocului este un pătrat de nouă pe nouă căsuțe, subdivizat în tot atâtea pătrate identice, numite regiuni (vedeți figura). Cifrele nu reprezintă decât o convenție, relațiile aritmetice între ele nefiind de nici un folos. Interesul jocului consistă în simplitatea regulilor sale și în complexitatea soluțiilor sale. Acest joc a inspirat deja mai multe versiuni electronice care aduc un interes diferit rezolvării grilelor Sudoku. Grilele sunt publicate în ziare, dar pot fi și generate cu ajutorul unui computer.

Main Page Solving Sudoku : Technique 7 : Hidden Pairs/Triples Hopefully you've got the hang of finding Naked Pairs and Triples - if not, practise looking for those before trying to understand the hidden equivalent! Hidden pairs and triples are quite a bit trickier to spot - they're hiding after all! Using the same notation as before, just looking at the cells which haven't been fixed yet: {46} {24} {13} {26} {123} Because 1 and 3 can only exist in two of those cells (no other cells will accept either of them), that means they must be in those two cells, leaving no room for any other. Even though you don't know which is a 1 and which is a 3, you do know that the two isn't welcome, so you can remove it as a candidate from the end cell! (The eagle-eyed readers will spot that you could have arrived at the same result by looking for the naked triple {46} {24} {26} - which would result in just the same - removing the 2 as a candidate from the end cell. This happens quite often!) Looking for hidden groups Even harder... The elusive Hidden Quad?

Sudoku Generator Sudoku Generator Here is a free Sudoku generator that can generate puzzles of varying difficulty in PDF, Postscript, plaintext, and HTML. It is a nice example of the website fun you can have with 250 lines of Python over a Labor day weekend; it also makes a handy command-line Sudoku solver... Update: For Google Chrome users, try installing this Chrome Sudoku Web App for hints and more. Preview the Sudoku Helper here. What is Sudoku? Have you ever played Sudoku? The rules of Sudoku are simple: finish filling in the squares of a 9x9 grid so that the digits 1-9 appear exactly once in each of the nine rows, columns, and 3x3 blocks. Ways to Play Sudoku is a good solo game; if you are having trouble getting into it, you can read about various solution strategies on the web. But, like crosswords, it can be even more fun to work Sudoku puzzles together with somebody else. I realized Sudoku was a major phenomenon when I saw the Dora Sudoku books for preschoolers. Counting Sudoku Boards Rating Puzzles

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