Sudoku Solver

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