SudokuSolver/app/sample_sudokus/testfall_3.txt

1 2 3 0 0 0 0 0 0 
4 5 6 0 0 0 0 0 0
0 0 0 7 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0