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

This Sudoku Puzzle has 57 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing) techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 2 / Column 3 → 8 (Naked Single)
2. Row 2 / Column 7 → 4 (Naked Single)
3. Row 2 / Column 8 → 7 (Full House)
4. Row 5 / Column 5 → 7 (Hidden Single)
5. Row 3 / Column 1 → 2 (Hidden Single)
6. Row 9 / Column 2 → 7 (Hidden Single)
7. Row 4 / Column 2 → 1 (Hidden Single)
8. Row 8 / Column 1 → 5 (Hidden Single)
9. Row 8 / Column 6 → 7 (Hidden Single)
10. Row 1 / Column 6 → 8 (Hidden Single)
11. Row 9 / Column 5 → 8 (Hidden Single)
12. Row 9 / Column 7 → 2 (Hidden Single)
13. Row 7 / Column 9 → 7 (Hidden Single)
14. Row 3 / Column 4 → 7 (Hidden Single)
15. Row 3 / Column 2 → 9 (Hidden Single)
16. Row 9 / Column 3 → 9 (Hidden Single)
17. Row 8 / Column 7 → 9 (Hidden Single)
18. Row 1 / Column 5 → 9 (Hidden Single)
19. Locked Candidates Type 1 (Pointing): 3 in b1 => r78c3<>3
20. Row 8 / Column 9 → 3 (Hidden Single)
21. Row 7 / Column 1 → 3 (Hidden Single)
22. Locked Candidates Type 1 (Pointing): 5 in b5 => r6c7<>5
23. Locked Candidates Type 1 (Pointing): 4 in b8 => r46c4<>4
24. Locked Candidates Type 1 (Pointing): 6 in b8 => r146c4<>6
25. Row 1 / Column 4 → 5 (Naked Single)
26. Row 3 / Column 5 → 6 (Full House)
27. Row 4 / Column 5 → 4 (Naked Single)
28. Row 6 / Column 5 → 5 (Full House)
29. Row 4 / Column 1 → 8 (Naked Single)
30. Row 6 / Column 1 → 4 (Full House)
31. Row 4 / Column 9 → 6 (Naked Single)
32. Row 4 / Column 6 → 9 (Naked Single)
33. Row 6 / Column 6 → 6 (Full House)
34. Row 9 / Column 9 → 4 (Naked Single)
35. Row 9 / Column 4 → 6 (Full House)
36. Row 8 / Column 4 → 4 (Full House)
37. Row 8 / Column 3 → 6 (Full House)
38. Row 7 / Column 3 → 4 (Full House)
39. Row 6 / Column 2 → 3 (Naked Single)
40. Row 5 / Column 2 → 6 (Full House)
41. Row 5 / Column 9 → 5 (Naked Single)
42. Row 3 / Column 9 → 8 (Full House)
43. Row 6 / Column 4 → 2 (Naked Single)
44. Row 4 / Column 4 → 3 (Full House)
45. Row 4 / Column 8 → 2 (Full House)
46. Row 6 / Column 7 → 8 (Naked Single)
47. Row 6 / Column 8 → 9 (Full House)
48. Row 5 / Column 7 → 3 (Naked Single)
49. Row 5 / Column 8 → 4 (Full House)
50. Row 3 / Column 8 → 3 (Naked Single)
51. Row 7 / Column 7 → 6 (Naked Single)
52. Row 7 / Column 8 → 8 (Full House)
53. Row 1 / Column 8 → 6 (Full House)
54. Row 3 / Column 3 → 1 (Naked Single)
55. Row 1 / Column 3 → 3 (Full House)
56. Row 1 / Column 7 → 1 (Full House)
57. Row 3 / Column 7 → 5 (Full House)
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