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

This Sudoku Puzzle has 65 steps and it is solved using Locked Candidates Type 1 (Pointing), Naked Triple, Naked Single, Hidden Single, Locked Candidates Type 2 (Claiming), Hidden Rectangle, AIC, Full House techniques.

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Solution Steps:

1. Locked Candidates Type 1 (Pointing): 1 in b2 => r46c5<>1
2. Locked Candidates Type 1 (Pointing): 3 in b7 => r7c79<>3
3. Naked Triple: 2,3,4 in r2c156 => r2c237<>2, r2c27<>3, r2c2<>4
4. Row 2 / Column 2 → 7 (Naked Single)
5. Row 7 / Column 3 → 7 (Hidden Single)
6. Locked Candidates Type 1 (Pointing): 3 in b3 => r3c1256<>3
7. Locked Candidates Type 2 (Claiming): 2 in r2 => r13c5,r3c6<>2
8. Hidden Rectangle: 2/3 in r3c79,r8c79 => r8c7<>2
9. AIC: 5 5- r6c7 -2- r6c3 -1- r8c3 =1= r8c9 -1- r9c9 -5 => r6c9,r79c7<>5
10. Locked Candidates Type 1 (Pointing): 5 in b6 => r2c7<>5
11. Row 2 / Column 7 → 9 (Naked Single)
12. Row 2 / Column 3 → 5 (Naked Single)
13. Row 1 / Column 8 → 5 (Hidden Single)
14. Row 3 / Column 3 → 9 (Hidden Single)
15. Row 3 / Column 1 → 8 (Hidden Single)
16. Row 8 / Column 3 → 8 (Hidden Single)
17. Row 8 / Column 9 → 1 (Hidden Single)
18. Row 9 / Column 9 → 5 (Naked Single)
19. Row 9 / Column 2 → 1 (Hidden Single)
20. Row 8 / Column 7 → 3 (Hidden Single)
21. Row 3 / Column 9 → 3 (Hidden Single)
22. Row 7 / Column 5 → 5 (Hidden Single)
23. Row 3 / Column 5 → 1 (Hidden Single)
24. Locked Candidates Type 1 (Pointing): 2 in b3 => r3c2<>2
25. Locked Candidates Type 1 (Pointing): 6 in b7 => r7c47<>6
26. Row 9 / Column 7 → 6 (Hidden Single)
27. Row 9 / Column 6 → 8 (Naked Single)
28. Row 9 / Column 5 → 9 (Naked Single)
29. Row 9 / Column 8 → 7 (Full House)
30. Row 3 / Column 8 → 2 (Naked Single)
31. Row 3 / Column 7 → 7 (Full House)
32. Row 8 / Column 8 → 4 (Naked Single)
33. Row 5 / Column 8 → 8 (Naked Single)
34. Row 7 / Column 8 → 9 (Full House)
35. Row 7 / Column 9 → 2 (Naked Single)
36. Row 6 / Column 9 → 4 (Full House)
37. Row 7 / Column 7 → 8 (Full House)
38. Row 7 / Column 4 → 4 (Naked Single)
39. Row 4 / Column 5 → 8 (Hidden Single)
40. Row 6 / Column 4 → 9 (Hidden Single)
41. Row 2 / Column 5 → 4 (Hidden Single)
42. Row 2 / Column 1 → 3 (Naked Single)
43. Row 2 / Column 6 → 2 (Full House)
44. Row 3 / Column 6 → 6 (Naked Single)
45. Row 1 / Column 5 → 3 (Full House)
46. Row 3 / Column 2 → 4 (Full House)
47. Row 7 / Column 1 → 6 (Naked Single)
48. Row 7 / Column 2 → 3 (Full House)
49. Row 5 / Column 6 → 4 (Naked Single)
50. Row 6 / Column 5 → 2 (Naked Single)
51. Row 8 / Column 5 → 6 (Full House)
52. Row 8 / Column 4 → 2 (Full House)
53. Row 1 / Column 1 → 1 (Naked Single)
54. Row 4 / Column 1 → 4 (Full House)
55. Row 4 / Column 6 → 5 (Naked Single)
56. Row 6 / Column 6 → 3 (Full House)
57. Row 5 / Column 4 → 6 (Naked Single)
58. Row 4 / Column 4 → 1 (Full House)
59. Row 5 / Column 2 → 2 (Full House)
60. Row 1 / Column 2 → 6 (Full House)
61. Row 1 / Column 3 → 2 (Full House)
62. Row 6 / Column 3 → 1 (Naked Single)
63. Row 6 / Column 7 → 5 (Full House)
64. Row 4 / Column 7 → 2 (Full House)
65. Row 4 / Column 3 → 6 (Full House)