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

This Sudoku Puzzle has 69 steps and it is solved using Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Naked Triple, Naked Single, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 3 / Column 1 → 9 (Hidden Single)
2. Row 6 / Column 6 → 9 (Hidden Single)
3. Row 2 / Column 2 → 6 (Hidden Single)
4. Row 2 / Column 8 → 7 (Hidden Single)
5. Row 5 / Column 3 → 2 (Hidden Single)
6. Row 5 / Column 8 → 4 (Hidden Single)
7. Row 9 / Column 3 → 7 (Hidden Single)
8. Row 5 / Column 7 → 6 (Hidden Single)
9. Row 4 / Column 7 → 5 (Hidden Single)
10. Locked Pair: 2,8 in r6c78 => r46c9,r6c2<>8, r46c9<>2
11. Locked Candidates Type 1 (Pointing): 4 in b1 => r7c3<>4
12. Locked Candidates Type 1 (Pointing): 8 in b4 => r89c2<>8
13. Locked Pair: 4,5 in r9c12 => r78c3,r8c2,r9c56<>5, r9c6<>4
14. Locked Candidates Type 1 (Pointing): 3 in b5 => r5c12<>3
15. Locked Candidates Type 1 (Pointing): 3 in b9 => r1c9<>3
16. Locked Candidates Type 2 (Claiming): 5 in c3 => r2c1<>5
17. Locked Candidates Type 2 (Claiming): 8 in c9 => r78c8,r9c7<>8
18. Naked Pair: 1,3 in r68c2 => r45c2<>1
19. Naked Pair: 1,8 in r58c4 => r17c4<>1, r7c4<>8
20. Naked Triple: 1,3,8 in r8c234 => r8c5<>1, r8c59<>8, r8c9<>3
21. Row 8 / Column 9 → 6 (Naked Single)
22. Row 1 / Column 9 → 2 (Naked Single)
23. Row 1 / Column 4 → 4 (Naked Single)
24. Row 9 / Column 9 → 8 (Naked Single)
25. Row 7 / Column 4 → 2 (Naked Single)
26. Row 7 / Column 9 → 3 (Naked Single)
27. Row 7 / Column 8 → 5 (Naked Single)
28. Row 9 / Column 6 → 6 (Naked Single)
29. Row 8 / Column 8 → 9 (Naked Single)
30. Row 9 / Column 7 → 2 (Full House)
31. Row 9 / Column 5 → 9 (Naked Single)
32. Row 1 / Column 8 → 6 (Naked Single)
33. Row 8 / Column 5 → 5 (Naked Single)
34. Row 6 / Column 7 → 8 (Naked Single)
35. Row 3 / Column 8 → 8 (Naked Single)
36. Row 6 / Column 8 → 2 (Full House)
37. Row 2 / Column 7 → 3 (Naked Single)
38. Row 1 / Column 7 → 9 (Full House)
39. Row 3 / Column 6 → 3 (Naked Single)
40. Row 2 / Column 1 → 1 (Naked Single)
41. Row 1 / Column 5 → 1 (Naked Single)
42. Row 3 / Column 3 → 4 (Naked Single)
43. Row 3 / Column 5 → 6 (Full House)
44. Row 2 / Column 3 → 5 (Naked Single)
45. Row 1 / Column 3 → 3 (Full House)
46. Row 1 / Column 6 → 5 (Full House)
47. Row 7 / Column 5 → 8 (Naked Single)
48. Row 2 / Column 5 → 2 (Naked Single)
49. Row 2 / Column 6 → 8 (Full House)
50. Row 7 / Column 3 → 1 (Naked Single)
51. Row 7 / Column 6 → 4 (Full House)
52. Row 8 / Column 4 → 1 (Full House)
53. Row 8 / Column 3 → 8 (Full House)
54. Row 8 / Column 2 → 3 (Full House)
55. Row 5 / Column 4 → 8 (Full House)
56. Row 4 / Column 5 → 7 (Naked Single)
57. Row 5 / Column 5 → 3 (Full House)
58. Row 5 / Column 6 → 1 (Naked Single)
59. Row 4 / Column 6 → 2 (Full House)
60. Row 6 / Column 2 → 1 (Naked Single)
61. Row 5 / Column 2 → 5 (Naked Single)
62. Row 5 / Column 1 → 7 (Full House)
63. Row 4 / Column 1 → 4 (Naked Single)
64. Row 4 / Column 9 → 1 (Naked Single)
65. Row 6 / Column 9 → 7 (Full House)
66. Row 6 / Column 1 → 3 (Full House)
67. Row 4 / Column 2 → 8 (Full House)
68. Row 9 / Column 2 → 4 (Full House)
69. Row 9 / Column 1 → 5 (Full House)