testcase.txt

5 3 4 6 7 8 9 1 2
6 7 2 1 9 5 3 4 8
1 9 8 3 4 2 5 6 7
8 5 9 7 6 1 4 2 3
4 2 6 8 5 3 7 9 1
7 1 3 9 2 4 8 5 6
9 6 1 5 3 7 2 8 4
2 8 7 4 1 9 6 3 5
3 4 5 2 8 6 1 7 9

5 5 4 6 7 8 9 1 2
6 7 2 1 9 5 3 4 8
1 9 8 3 4 2 5 6 7
8 5 9 7 6 1 4 2 3
4 2 6 8 5 3 7 9 1
7 1 3 9 2 4 8 5 6
9 6 1 5 3 7 2 8 4
2 8 7 4 1 9 3 3 5
3 4 5 2 8 6 1 7 9








% Example 9x9 Sudoku Grid
grid = [
    5 3 4 6 7 8 9 1 2;
    6 7 2 1 9 5 3 4 8;
    1 9 8 3 4 2 5 6 7;
    8 5 9 7 6 1 4 2 3;
    4 2 6 8 5 3 7 9 1;
    7 1 3 9 2 4 8 5 6;
    9 6 1 5 3 7 2 8 4;
    2 8 7 4 1 9 6 3 5;
    3 4 5 2 8 6 1 7 9
];
grid2 = [   
             8 8 7 1 5 4 3 9 6; % change 2 to 8 at loc at (1,2)
             9 6 5 3 2 7 1 4 8;  
             3 4 1 6 8 9 7 5 2;  
             5 9 3 4 6 8 2 7 1;  
             4 7 2 5 1 3 6 8 9;  
             6 1 8 9 7 2 4 3 5;  
             7 8 6 2 3 5 9 1 4;   
             1 5 4 7 9 6 8 2 3;   
             2 3 9 8 4 1 5 6 7]; 



fprintf('Enter your 9x9 Sudoku grid row by row (use space between numbers):\n');
    
    grid = zeros(9, 9);  
    
    for i = 1:9
        rowInput = input(sprintf(''), 's');  % Take row as a string
        grid(i, :) = str2num(rowInput);  % Convert string to numeric row
    end