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

This Sudoku Puzzle has 42 steps and it is solved using Naked Single, Full House, Uniqueness Test 1 techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 9 → 3 (Naked Single)
2. Row 5 / Column 1 → 4 (Full House)
3. Row 3 / Column 8 → 5 (Naked Single)
4. Row 2 / Column 2 → 5 (Naked Single)
5. Row 8 / Column 7 → 6 (Naked Single)
6. Row 3 / Column 9 → 6 (Naked Single)
7. Row 7 / Column 2 → 2 (Naked Single)
8. Row 6 / Column 2 → 9 (Full House)
9. Row 1 / Column 7 → 2 (Naked Single)
10. Row 4 / Column 7 → 7 (Full House)
11. Row 7 / Column 9 → 4 (Naked Single)
12. Row 9 / Column 9 → 1 (Full House)
13. Row 8 / Column 3 → 3 (Naked Single)
14. Row 8 / Column 4 → 9 (Full House)
15. Row 3 / Column 1 → 7 (Naked Single)
16. Row 3 / Column 4 → 3 (Full House)
17. Row 4 / Column 1 → 3 (Naked Single)
18. Row 7 / Column 1 → 6 (Naked Single)
19. Row 9 / Column 1 → 9 (Full House)
20. Row 9 / Column 4 → 6 (Full House)
21. Row 1 / Column 1 → 1 (Full House)
22. Row 6 / Column 4 → 7 (Naked Single)
23. Row 4 / Column 6 → 6 (Naked Single)
24. Row 7 / Column 5 → 3 (Naked Single)
25. Row 7 / Column 6 → 5 (Full House)
26. Row 2 / Column 4 → 1 (Naked Single)
27. Row 4 / Column 4 → 4 (Full House)
28. Row 6 / Column 6 → 3 (Full House)
29. Row 1 / Column 6 → 7 (Full House)
30. Uniqueness Test 1: 2/8 in r4c39,r6c39 => r4c9<>2, r4c9<>8
31. Row 4 / Column 9 → 9 (Naked Single)
32. Row 1 / Column 9 → 8 (Naked Single)
33. Row 6 / Column 9 → 2 (Full House)
34. Row 4 / Column 8 → 8 (Full House)
35. Row 6 / Column 3 → 8 (Full House)
36. Row 4 / Column 3 → 2 (Full House)
37. Row 1 / Column 5 → 6 (Naked Single)
38. Row 2 / Column 5 → 8 (Full House)
39. Row 2 / Column 8 → 4 (Naked Single)
40. Row 1 / Column 8 → 9 (Full House)
41. Row 1 / Column 3 → 4 (Full House)
42. Row 2 / Column 3 → 6 (Full House)