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

This Sudoku Puzzle has 69 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, Naked Single, Hidden Pair, Skyscraper, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 7 / Column 2 → 5 (Hidden Single)
2. Row 3 / Column 8 → 5 (Hidden Single)
3. Row 5 / Column 8 → 2 (Hidden Single)
4. Row 6 / Column 6 → 2 (Hidden Single)
5. Row 9 / Column 4 → 2 (Hidden Single)
6. Locked Candidates Type 1 (Pointing): 9 in b4 => r6c79<>9
7. Locked Candidates Type 1 (Pointing): 4 in b6 => r789c7<>4
8. Locked Candidates Type 1 (Pointing): 1 in b9 => r23c7<>1
9. Locked Candidates Type 1 (Pointing): 6 in b9 => r45c7<>6
10. Naked Pair: 4,7 in r47c3 => r268c3<>4, r268c3<>7
11. Row 8 / Column 3 → 2 (Naked Single)
12. Hidden Pair: 3,6 in r4c1,r5c2 => r4c1<>4, r4c1,r5c2<>7, r5c2<>1
13. Locked Candidates Type 1 (Pointing): 1 in b4 => r6c5<>1
14. Hidden Pair: 4,5 in r46c7 => r46c7<>7, r46c7<>8
15. Locked Candidates Type 1 (Pointing): 8 in b6 => r1c9<>8
16. Hidden Pair: 1,6 in r78c7 => r78c7<>7, r78c7<>8
17. Locked Candidates Type 1 (Pointing): 7 in b9 => r1c8<>7
18. Skyscraper: 3 in r4c1,r5c4 (connected by r7c14) => r4c56,r5c2<>3
19. Row 5 / Column 2 → 6 (Naked Single)
20. Row 4 / Column 1 → 3 (Naked Single)
21. Row 2 / Column 5 → 3 (Hidden Single)
22. Row 9 / Column 2 → 3 (Hidden Single)
23. Row 4 / Column 9 → 6 (Hidden Single)
24. Row 6 / Column 9 → 8 (Hidden Single)
25. Row 6 / Column 5 → 5 (Naked Single)
26. Row 4 / Column 5 → 8 (Naked Single)
27. Row 6 / Column 7 → 4 (Naked Single)
28. Row 4 / Column 6 → 7 (Naked Single)
29. Row 4 / Column 7 → 5 (Naked Single)
30. Row 4 / Column 3 → 4 (Full House)
31. Row 7 / Column 3 → 7 (Naked Single)
32. Row 8 / Column 6 → 5 (Hidden Single)
33. Row 1 / Column 2 → 4 (Hidden Single)
34. Row 8 / Column 8 → 7 (Hidden Single)
35. Row 2 / Column 6 → 4 (Hidden Single)
36. Row 9 / Column 6 → 8 (Naked Single)
37. Row 9 / Column 7 → 9 (Naked Single)
38. Row 9 / Column 8 → 4 (Full House)
39. Row 5 / Column 7 → 7 (Naked Single)
40. Row 5 / Column 9 → 9 (Full House)
41. Row 7 / Column 8 → 8 (Naked Single)
42. Row 1 / Column 8 → 9 (Full House)
43. Row 2 / Column 7 → 2 (Naked Single)
44. Row 7 / Column 1 → 4 (Naked Single)
45. Row 8 / Column 1 → 8 (Full House)
46. Row 3 / Column 7 → 8 (Naked Single)
47. Row 1 / Column 4 → 8 (Hidden Single)
48. Row 3 / Column 6 → 9 (Hidden Single)
49. Row 3 / Column 1 → 2 (Hidden Single)
50. Row 8 / Column 4 → 4 (Hidden Single)
51. Row 3 / Column 4 → 7 (Hidden Single)
52. Row 3 / Column 2 → 1 (Naked Single)
53. Row 3 / Column 5 → 6 (Full House)
54. Row 6 / Column 2 → 7 (Full House)
55. Row 1 / Column 6 → 1 (Full House)
56. Row 8 / Column 5 → 1 (Full House)
57. Row 8 / Column 7 → 6 (Full House)
58. Row 7 / Column 7 → 1 (Full House)
59. Row 2 / Column 3 → 9 (Naked Single)
60. Row 6 / Column 3 → 1 (Full House)
61. Row 6 / Column 1 → 9 (Full House)
62. Row 1 / Column 9 → 7 (Naked Single)
63. Row 1 / Column 1 → 6 (Full House)
64. Row 2 / Column 1 → 7 (Full House)
65. Row 2 / Column 9 → 1 (Full House)
66. Row 5 / Column 6 → 3 (Naked Single)
67. Row 5 / Column 4 → 1 (Full House)
68. Row 7 / Column 4 → 3 (Full House)
69. Row 7 / Column 6 → 6 (Full House)