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

This Sudoku Puzzle has 48 steps and it is solved using Naked Single, Full House, Hidden Single, Uniqueness Test 1, Avoidable Rectangle Type 1 techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 4 / Column 7 → 8 (Naked Single)
2. Row 3 / Column 3 → 9 (Naked Single)
3. Row 3 / Column 7 → 4 (Naked Single)
4. Row 5 / Column 7 → 5 (Full House)
5. Row 4 / Column 9 → 7 (Naked Single)
6. Row 9 / Column 8 → 7 (Naked Single)
7. Row 8 / Column 9 → 5 (Full House)
8. Row 1 / Column 9 → 9 (Naked Single)
9. Row 3 / Column 4 → 2 (Naked Single)
10. Row 3 / Column 9 → 6 (Naked Single)
11. Row 5 / Column 9 → 4 (Full House)
12. Row 5 / Column 8 → 1 (Full House)
13. Row 3 / Column 1 → 7 (Full House)
14. Row 4 / Column 5 → 6 (Naked Single)
15. Row 5 / Column 3 → 8 (Naked Single)
16. Row 5 / Column 4 → 9 (Naked Single)
17. Row 5 / Column 2 → 6 (Naked Single)
18. Row 5 / Column 6 → 7 (Full House)
19. Row 8 / Column 1 → 8 (Hidden Single)
20. Row 2 / Column 6 → 9 (Hidden Single)
21. Row 7 / Column 5 → 7 (Hidden Single)
22. Row 6 / Column 2 → 9 (Hidden Single)
23. Row 8 / Column 2 → 7 (Hidden Single)
24. Row 9 / Column 5 → 3 (Hidden Single)
25. Row 9 / Column 3 → 5 (Naked Single)
26. Row 9 / Column 2 → 4 (Full House)
27. Uniqueness Test 1: 1/3 in r1c23,r7c23 => r1c2<>1, r1c2<>3
28. Row 1 / Column 3 → 3 (Hidden Single)
29. Row 7 / Column 3 → 1 (Full House)
30. Row 7 / Column 2 → 3 (Full House)
31. Row 1 / Column 1 → 1 (Hidden Single)
32. Row 4 / Column 1 → 2 (Naked Single)
33. Row 2 / Column 1 → 4 (Full House)
34. Row 4 / Column 2 → 1 (Full House)
35. Uniqueness Test 1: 1/4 in r6c46,r8c46 => r6c4<>1, r6c4<>4
36. Row 6 / Column 4 → 8 (Naked Single)
37. Row 1 / Column 4 → 4 (Naked Single)
38. Row 8 / Column 4 → 1 (Full House)
39. Row 8 / Column 6 → 4 (Full House)
40. Row 6 / Column 6 → 1 (Full House)
41. Row 6 / Column 5 → 4 (Full House)
42. Avoidable Rectangle Type 1: 2/1 in r1c12,r4c12 => r1c2<>2
43. Row 1 / Column 2 → 5 (Naked Single)
44. Row 2 / Column 2 → 2 (Full House)
45. Row 1 / Column 5 → 8 (Naked Single)
46. Row 1 / Column 8 → 2 (Full House)
47. Row 2 / Column 8 → 8 (Full House)
48. Row 2 / Column 5 → 5 (Full House)