Sudoku Definition and 25 Threads

Hello everybody! I have to implement a sudoku solver in C ++ taking advantage by graph coloring theory, where each number to insert is a color of the associated graph node. In particular I would like to use the Welsh-Powell algorithm. I find myself in trouble starting with this project and I...

Hi, This looked interesting. Determinant and Linear-Algebraic aspects of Sudoku puzzles: http://www.student.montefiore.ulg.ac.be/~merciadri/docs/papers/sudoku.pdf

If we suppose there is an algorithm for P vs NP, would it have to be able to find solutions where we now use trial and error? In harder Sudokus, for example, there are times when you have two or more possible numbers and need to guess whereafter you work the rest of the numbers through to see if...

Hi All, I am trying to identify features in Sudoku puzzles that separate the "trouble" ones that are hard for me from the ones that are not. But I am having trouble finding techniques to do this. I have been a fan of solving the standard 9x9 Sudoku puzzles, specially the "Evil" type from...

I am attempting to create a Sudoku Solving Program in Java This is what I have to far https://pastebin.com/raw/tgnAGKb2 I have spent close to an hour trying to debug it but to no avail Can someone more skilled than I please point me in the right direction?

Homework Statement # Sudoku [http://en.wikipedia.org/wiki/Sudoku] # is a logic puzzle where a game # is defined by a partially filled # 9 x 9 square of digits where each square # contains one of the digits 1,2,3,4,5,6,7,8,9. # For this question we will generalize # and simplify the game. #...

How to solve the attached Sudoku without computer or a guess?

Homework Statement A while ago someone posted this problem: ----------------------------------------------------------------------------------- Problem 1 (given after a discussion of determinants in week 3/4 of the course): Consider a 9x9 matrix A. We say that A is a Sudoku matrix if it's...

For few days I am thinking to write a code in FORTRAN to solve the sudoku puzzle. At first it seams simple but I have no luck writing this code. I am wondering if there is any written code to solve this puzzle. I hope Sudoku puzzle is known for members here. en.wikipedia.org/wiki/Sudoku

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Hi ,I want to generate a sudoku game in c sharp.First I will make 3*3 cells sudoku simple,then whole sudoku (9*9) . I ve added to form 9 commoboxes and a star button. When ı click the start button , the programme will fill randomly two cells with 1, 2, or 3 . Then player will fill other empty...

For an exercise, I want to axiomatize sudoku. I've came up with the definition of the sudoku puzzle in mathematical terms, as well as the definition of a solved puzzle. I'm have trouble going from there to draw theorems from my newly defined system. How does one generate theorems about an...

Hey everyone, I'm trying to teach myself C++ and I recalled that a few years ago my Comp Sci major buddy of mine did a sudoku solving program as a project for a class so I decided to tackle it on my own. I'm getting some headway, but I'm having trouble figuring out a way to "brute force"...

I'm writing a program in java and I need to find an algorithm to calculate all possible sudoku solutions for a board of size n. I don't need to know how to solve it, just how many possibilities there are.

I can't find a solution to these questions. Can someone help? 1. An algorithm to determine if a Sudoku puzzle is easy, medium, hard, or evil. 2. For every valid Sudoku puzzle, there exist at least one valid solution. True or false? Proof?

You do NOT have to read the entire code to help me. :smile: It's just for your reference. The problem: I keep getting the message that the file 'algorithm.h' can not be opened. But the header file is very much present in the include folder. What do i do? The compiler I'm using is tubo...

Please help in c++ urgent Argh! I've been trying to work out this problem for an entire week and I'm now at my wits end! I'm supposed to hand in this assignment in 7 hours and am posting my problem here as a last resort. Can i please have someone's assistance in this? I use Dev-C++. Basically...

Hi guys, I'm being asked to do a mini-project...Basically, i get a code in JAVA and "edit". Editting can be improving the interface, adding exception handling or adding features and so...I chose Sudodu as my topic..after much searching I found this code but I'm out of ideas, what can be improved...

I was wondering if there was a more efficient way of generating sudoku puzzles. I already have a method to create puzzles of varying difficulties that goes something like this: - Randomly generate a completed 9x9 solved sudoku - Randomly remove some of the numbers from the matrix (as...

A "Possibly easy for you, but hard for me" Question about Sudoku How to calculate the maximum number of valid patterns on a 9x9 Sudoku board? I was coding a flash application which is basically a "sudoku solver". This question is not related with qhat I'm doing but just curious. Please...

Is there any math way to solve a "Sudoku" I didn,t know where to put this question...my doubt is if there is an exact math way to solve a "Sudoku"...:rolleyes: :rolleyes: ( i don,t think is necessary to explain the game isn,t it?) as far as i know Euler himself "invented" the game about 300...

I was wondering if there is a way to solve these puzzles with matricies and/or diophantine equations: http://www.sudoku.com/ If you define the basis as nine orthogonal vectors, and input the given initial values to the corresponding places in a 9X9 matrix, and also brake it up into 9 3X3...

Hi, I wondered whether there is any other way to solve these puzzles apart from just scanning and trial and error ? Also is there any relevance to group theory or any other mathematics ? Is there any practical way of solving it mentally ? because I have to write out the various...

Hi! I've got a couple of questions about Sudoku. 1. How many possible Sudoku boards are there? That is, a 3x3 square of 3x3 blocks where (a) each block has the numbers 1-9 exactly once, and (b) each row and column of the resulting 9x9 matrix has the numbers 1-9 exactly once? 2. I'm...

http://en.wikipedia.org/wiki/Sudoku I have found myself addicted to working on them. has anyone else here found these things interesting? I'm currently trying to work out the probability of degeneracy when given a particular square, it has proven challenging...