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

This Sudoku Puzzle has 70 steps and it is solved using Locked Candidates Type 1 (Pointing), Hidden Pair, Finned Swordfish, Continuous Nice Loop, Hidden Single, Naked Single, Hidden Triple, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Locked Candidates Type 1 (Pointing): 3 in b1 => r46c2<>3
2. Locked Candidates Type 1 (Pointing): 7 in b1 => r79c3<>7
3. Locked Candidates Type 1 (Pointing): 9 in b8 => r46c5<>9
4. Hidden Pair: 4,5 in r8c2,r9c3 => r8c2<>2, r8c2,r9c3<>8, r9c3<>6, r9c3<>9
5. Locked Candidates Type 1 (Pointing): 2 in b7 => r7c7<>2
6. Locked Candidates Type 1 (Pointing): 6 in b7 => r45c1<>6
7. Finned Swordfish: 5 r159 c359 fr1c7 => r2c9<>5
8. Continuous Nice Loop: 3/5/6/7/9 6= r1c5 =2= r6c5 -2- r5c4 =2= r5c3 =6= r5c6 -6- r3c6 =6= r1c5 =2 => r1c5<>3, r1c5,r5c3<>5, r4c6<>6, r1c5<>7, r5c3<>9
9. Row 5 / Column 9 → 5 (Hidden Single)
10. Row 1 / Column 7 → 5 (Hidden Single)
11. Locked Candidates Type 1 (Pointing): 3 in b6 => r79c7<>3
12. Hidden Pair: 1,3 in r7c59 => r7c59<>7, r7c5<>9, r7c9<>8
13. Row 9 / Column 5 → 9 (Hidden Single)
14. Row 9 / Column 3 → 5 (Hidden Single)
15. Row 8 / Column 2 → 4 (Naked Single)
16. Row 4 / Column 2 → 5 (Hidden Single)
17. Hidden Triple: 2,6,9 in r13c8,r3c7 => r1c8<>4, r13c8,r3c7<>7, r3c78<>8, r3c8<>1
18. Row 8 / Column 8 → 1 (Hidden Single)
19. Row 7 / Column 9 → 3 (Naked Single)
20. Row 7 / Column 5 → 1 (Naked Single)
21. Row 8 / Column 7 → 2 (Hidden Single)
22. Row 9 / Column 4 → 3 (Hidden Single)
23. Row 8 / Column 1 → 6 (Hidden Single)
24. Row 1 / Column 2 → 3 (Hidden Single)
25. Row 3 / Column 6 → 3 (Hidden Single)
26. Row 8 / Column 4 → 8 (Hidden Single)
27. Row 5 / Column 1 → 3 (Hidden Single)
28. Row 5 / Column 6 → 6 (Hidden Single)
29. Row 5 / Column 3 → 2 (Naked Single)
30. Row 5 / Column 4 → 4 (Naked Single)
31. Row 5 / Column 8 → 9 (Full House)
32. Row 1 / Column 5 → 6 (Hidden Single)
33. Row 1 / Column 8 → 2 (Naked Single)
34. Row 1 / Column 4 → 7 (Naked Single)
35. Row 3 / Column 8 → 6 (Naked Single)
36. Row 1 / Column 9 → 4 (Naked Single)
37. Row 1 / Column 3 → 9 (Full House)
38. Row 2 / Column 5 → 5 (Naked Single)
39. Row 4 / Column 4 → 1 (Naked Single)
40. Row 3 / Column 4 → 2 (Full House)
41. Row 2 / Column 6 → 1 (Full House)
42. Row 3 / Column 7 → 9 (Naked Single)
43. Row 3 / Column 2 → 8 (Naked Single)
44. Row 7 / Column 3 → 8 (Naked Single)
45. Row 8 / Column 5 → 7 (Naked Single)
46. Row 8 / Column 6 → 5 (Full House)
47. Row 3 / Column 3 → 7 (Naked Single)
48. Row 2 / Column 3 → 4 (Full House)
49. Row 3 / Column 9 → 1 (Full House)
50. Row 6 / Column 2 → 9 (Naked Single)
51. Row 7 / Column 2 → 2 (Full House)
52. Row 4 / Column 3 → 6 (Naked Single)
53. Row 6 / Column 3 → 1 (Full House)
54. Row 4 / Column 1 → 8 (Full House)
55. Row 7 / Column 7 → 7 (Naked Single)
56. Row 7 / Column 1 → 9 (Full House)
57. Row 9 / Column 1 → 7 (Full House)
58. Row 4 / Column 5 → 3 (Naked Single)
59. Row 6 / Column 5 → 2 (Full House)
60. Row 6 / Column 6 → 7 (Naked Single)
61. Row 4 / Column 6 → 9 (Full House)
62. Row 2 / Column 7 → 8 (Naked Single)
63. Row 2 / Column 9 → 7 (Full House)
64. Row 9 / Column 9 → 8 (Full House)
65. Row 4 / Column 7 → 4 (Naked Single)
66. Row 4 / Column 8 → 7 (Full House)
67. Row 6 / Column 8 → 8 (Naked Single)
68. Row 6 / Column 7 → 3 (Full House)
69. Row 9 / Column 8 → 4 (Full House)
70. Row 9 / Column 7 → 6 (Full House)