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

This Sudoku Puzzle has 71 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Naked Triple, Full House, Empty Rectangle, undefined, Hidden Rectangle, Finned Swordfish techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 1 / Column 4 → 7 (Hidden Single)
2. Row 1 / Column 3 → 5 (Hidden Single)
3. Row 1 / Column 6 → 1 (Naked Single)
4. Row 1 / Column 8 → 9 (Naked Single)
5. Locked Candidates Type 1 (Pointing): 8 in b8 => r9c13<>8
6. Locked Candidates Type 2 (Claiming): 2 in r1 => r2c123,r3c12<>2
7. Naked Pair: 2,3 in r25c5 => r4689c5<>3, r6c5<>2
8. Locked Candidates Type 1 (Pointing): 3 in b8 => r9c78<>3
9. Naked Triple: 1,6,7 in r79c8,r8c9 => r8c78,r9c79<>7, r8c8,r9c9<>1, r8c8<>6
10. Row 8 / Column 8 → 3 (Naked Single)
11. Row 8 / Column 7 → 4 (Naked Single)
12. Row 9 / Column 5 → 4 (Hidden Single)
13. Row 1 / Column 1 → 4 (Hidden Single)
14. Row 1 / Column 2 → 2 (Full House)
15. Locked Candidates Type 2 (Claiming): 5 in c5 => r4c6,r6c4<>5
16. Naked Triple: 1,5,6 in r7c46,r8c5 => r9c4<>1, r9c46<>5, r9c6<>6
17. Locked Candidates Type 1 (Pointing): 5 in b8 => r7c7<>5
18. Naked Triple: 1,5,6 in r7c468 => r7c23<>1, r7c23<>6
19. Empty Rectangle: 3 in b1 (r25c5) => r5c2<>3
20. XYZ-Wing: 2/3/8 in r5c45,r9c4 => r6c4<>3
21. Hidden Rectangle: 4/9 in r5c23,r7c23 => r5c3<>9
22. Finned Swordfish: 2 r357 c347 fr5c5 => r6c4<>2
23. Row 6 / Column 4 → 1 (Naked Single)
24. Row 7 / Column 4 → 5 (Naked Single)
25. Row 7 / Column 6 → 6 (Naked Single)
26. Row 7 / Column 8 → 1 (Naked Single)
27. Row 8 / Column 5 → 1 (Naked Single)
28. Row 3 / Column 8 → 8 (Naked Single)
29. Row 8 / Column 9 → 7 (Naked Single)
30. Row 3 / Column 7 → 2 (Naked Single)
31. Row 5 / Column 8 → 7 (Naked Single)
32. Row 9 / Column 8 → 6 (Full House)
33. Row 2 / Column 7 → 7 (Naked Single)
34. Row 2 / Column 9 → 1 (Full House)
35. Row 3 / Column 4 → 3 (Naked Single)
36. Row 7 / Column 7 → 9 (Naked Single)
37. Row 2 / Column 5 → 2 (Naked Single)
38. Row 3 / Column 6 → 5 (Full House)
39. Row 9 / Column 4 → 8 (Naked Single)
40. Row 5 / Column 4 → 2 (Full House)
41. Row 9 / Column 6 → 3 (Full House)
42. Row 7 / Column 2 → 4 (Naked Single)
43. Row 7 / Column 3 → 2 (Full House)
44. Row 9 / Column 7 → 5 (Naked Single)
45. Row 9 / Column 9 → 2 (Full House)
46. Row 5 / Column 5 → 3 (Naked Single)
47. Row 5 / Column 2 → 9 (Naked Single)
48. Row 6 / Column 7 → 3 (Naked Single)
49. Row 4 / Column 7 → 8 (Full House)
50. Row 5 / Column 3 → 4 (Naked Single)
51. Row 5 / Column 6 → 8 (Full House)
52. Row 4 / Column 6 → 9 (Full House)
53. Row 2 / Column 2 → 3 (Naked Single)
54. Row 6 / Column 3 → 6 (Naked Single)
55. Row 4 / Column 9 → 5 (Naked Single)
56. Row 6 / Column 9 → 9 (Full House)
57. Row 6 / Column 1 → 2 (Naked Single)
58. Row 6 / Column 5 → 5 (Full House)
59. Row 4 / Column 5 → 6 (Full House)
60. Row 8 / Column 3 → 8 (Naked Single)
61. Row 8 / Column 1 → 6 (Full House)
62. Row 2 / Column 3 → 9 (Naked Single)
63. Row 2 / Column 1 → 8 (Full House)
64. Row 3 / Column 1 → 1 (Naked Single)
65. Row 3 / Column 2 → 6 (Full House)
66. Row 9 / Column 3 → 1 (Naked Single)
67. Row 4 / Column 3 → 3 (Full House)
68. Row 4 / Column 1 → 7 (Naked Single)
69. Row 4 / Column 2 → 1 (Full House)
70. Row 9 / Column 2 → 7 (Full House)
71. Row 9 / Column 1 → 9 (Full House)