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# Recursively Solving A Sudoku Puzzle Using Backtracking Theoretically

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## Sudoku Solving - Skip on stage in backtracking

Tag : c , By : Vick Aita
Date : March 29 2020, 07:55 AM
I hope this helps you . You've already accomplished the first step, identifying where and when the problem occurs. With the help of a debugger, you can step through _Solve when iRow is 1 and iCol is 5. Here's what I see, just looking at the first point when your problem occurs:

## Solving sudoku puzzle with c++

Tag : cpp , By : James Dio
Date : March 29 2020, 07:55 AM
I hope this helps you . I'd recommend the same algorithm I use when solving them myself ;-)
Choose an arbitrary square and list all the valid values for it, based on what is present in all the other rows (there's probably a way to make a more efficient decision about which square to start with).

## Why is my JAVA code for solving sudoku using backtracking not giving any solution?

Tag : java , By : Paolo
Date : March 29 2020, 07:55 AM
I wish this helpful for you Your print method is never called! It seems that the sodoku is not solvable!
With the following input your code works fine:
``````{{3,0,6,5,0,8,4,0,0},
{5,2,0,0,0,0,0,0,0},
{0,8,7,0,0,0,0,3,1},
{0,0,3,0,1,0,0,8,0},
{9,0,0,8,6,3,0,0,5},
{0,5,0,0,9,0,6,0,0},
{1,3,0,0,0,0,2,5,0},
{0,0,0,0,0,0,0,7,4},
{0,0,5,2,0,6,3,0,0}};
``````
``````public static void print(int mat[][]) {
for (int i = 0; i < mat.length; i++) {
List<String> stringList = Arrays.stream(mat[i])
.mapToObj(String::valueOf).collect(Collectors.toList());
System.out.println(String.join(" ", stringList));
}
}
``````
``````3 1 6 5 7 8 4 9 2
5 2 9 1 3 4 7 6 8
4 8 7 6 2 9 5 3 1
2 6 3 4 1 5 9 8 7
9 7 4 8 6 3 1 2 5
8 5 1 7 9 2 6 4 3
1 3 8 9 4 7 2 5 6
6 9 2 3 5 1 8 7 4
7 4 5 2 8 6 3 1 9
``````

## Optimizing the backtracking algorithm solving Sudoku

Tag : algorithm , By : user183345
Date : March 29 2020, 07:55 AM

## Problem with recursive backtracking - Sudoku Solving Example

Tag : java , By : kdietz
Date : March 29 2020, 07:55 AM