JAVA SOLVING SUDOKU PUZZLES CODE
JAVA SOLVING SUDOKU PUZZLES FREE

JAVA SOLVING SUDOKU PUZZLES CODE

When the solver works 100% of the time, go back through you code and remove iteration.This should be really easy.Again, use iteration. (There are many other ways to write is solvable, this is probably the easiest.) Again, use iteration. If you find a square for which legalmovesat returns a zero length list, then the puzzle is not solvable. This can be written by just making calls to legalmovesat from every square that is not filled in. If it is not prefect, the rest of the program will fail.Use iteration Use iteration, Make sure that this is perfectly correct before doing anything else. This should be, by far the most complex piece of code you write for this assignment. (This could be done much later, but recursion is fun, so why not do it now?) Consider rewriting the read and copy methods to be purely recursive.This could be written later but it should be easy so get it done.Use iteration Write the system for reading in the board fix.That said, I would suggest starting as follows: Please note that this are only suggestions. Howerver your solution must use recursion with backtracking.

JAVA SOLVING SUDOKU PUZZLES FREE

You are free to implement other, more humann-like solution approaches. Note that while this approach can certainly be used by humans to solve sudoku puzzles, it is not the way that any reasonable person would. Generally, this approach starts in one corner of the puzzle and fills in a legal guess, then recursively go to the next square, backtracking when it gets to points in which the puzzle cannot be solved. Puzzle solve(Puzzle p, int xloc, int yloc) Making a change in the copy should have no effect on the original. Return a new instance of puzzle that is an exact copy of the provided puzzle. Return the list of numbers the can be legally put into the position given the board List legalmovesat(Puzzle p, int xloc, int yloc) Return true if the puzzle still might be solvalble, false otherwise Return true if the puzzle is completely solved false otherwise Here is pseudocode for my approach:Īt its simplest this could be just a 2d array (specifically 9x9) of int I describe one here, you need not follow my exact approach.

There are many approaches to solving Sudoku puzzles. I prefer the interface on the New York Times website. If you are unfamiliar with sudoku you should learn the rules and solve a couple of puzzles before starting. This assignment is to write a recursive sudoku solver. Sudoku is a game / logic puzzle with a simple set of rules. Recursion: Sudoku CS 206 - Introduction to Data Structures HW 7 Recursion: Sudoku Due: ?

Java solving sudoku puzzles