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

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

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 1 → 1 (Hidden Single)
2. Row 4 / Column 3 → 2 (Hidden Single)
3. Locked Candidates Type 2 (Claiming): 7 in c5 => r4c6,r6c4<>7
4. Naked Triple: 4,6,9 in r128c1 => r67c1<>4, r67c1<>6, r7c1<>9
5. Locked Candidates Type 1 (Pointing): 6 in b4 => r179c2<>6
6. Hidden Pair: 5,8 in r3c23 => r3c23<>3, r3c23<>4, r3c2<>9
7. Swordfish: 3 r258 c346 => r17c4,r3c6<>3
8. Swordfish: 5 r349 c239 => r5c39,r67c2<>5
9. Row 5 / Column 9 → 9 (Naked Single)
10. Swordfish: 8 r349 c236 => r5c36,r67c2<>8
11. Row 5 / Column 3 → 4 (Naked Single)
12. Row 5 / Column 6 → 3 (Naked Single)
13. Row 6 / Column 2 → 6 (Naked Single)
14. Naked Pair: 5,8 in r34c2 => r9c2<>5, r9c2<>8
15. Naked Pair: 3,6 in r28c3 => r9c3<>6
16. Locked Candidates Type 1 (Pointing): 6 in b7 => r8c679<>6
17. Naked Pair: 1,4 in r38c9 => r29c9<>4, r4c9<>1
18. Row 4 / Column 9 → 5 (Naked Single)
19. Row 4 / Column 2 → 8 (Naked Single)
20. Row 6 / Column 1 → 5 (Full House)
21. Row 5 / Column 7 → 8 (Naked Single)
22. Row 5 / Column 4 → 5 (Full House)
23. Row 3 / Column 2 → 5 (Naked Single)
24. Row 4 / Column 6 → 6 (Naked Single)
25. Row 7 / Column 1 → 8 (Naked Single)
26. Row 6 / Column 7 → 2 (Naked Single)
27. Row 3 / Column 3 → 8 (Naked Single)
28. Row 4 / Column 5 → 7 (Naked Single)
29. Row 4 / Column 8 → 1 (Full House)
30. Row 6 / Column 8 → 7 (Full House)
31. Row 7 / Column 4 → 4 (Naked Single)
32. Row 9 / Column 3 → 5 (Naked Single)
33. Row 6 / Column 5 → 4 (Naked Single)
34. Row 6 / Column 4 → 8 (Full House)
35. Row 1 / Column 4 → 2 (Naked Single)
36. Row 7 / Column 8 → 9 (Naked Single)
37. Row 7 / Column 2 → 3 (Naked Single)
38. Row 8 / Column 7 → 1 (Naked Single)
39. Row 7 / Column 5 → 6 (Naked Single)
40. Row 7 / Column 7 → 5 (Full House)
41. Row 8 / Column 3 → 6 (Naked Single)
42. Row 2 / Column 3 → 3 (Full House)
43. Row 8 / Column 9 → 4 (Naked Single)
44. Row 9 / Column 5 → 9 (Naked Single)
45. Row 2 / Column 4 → 7 (Naked Single)
46. Row 8 / Column 4 → 3 (Full House)
47. Row 3 / Column 9 → 1 (Naked Single)
48. Row 8 / Column 1 → 9 (Naked Single)
49. Row 8 / Column 6 → 7 (Full House)
50. Row 9 / Column 2 → 4 (Full House)
51. Row 9 / Column 6 → 8 (Full House)
52. Row 1 / Column 2 → 9 (Full House)
53. Row 9 / Column 8 → 2 (Naked Single)
54. Row 9 / Column 9 → 6 (Full House)
55. Row 2 / Column 9 → 2 (Full House)
56. Row 3 / Column 5 → 3 (Naked Single)
57. Row 1 / Column 5 → 1 (Full House)
58. Row 1 / Column 7 → 6 (Naked Single)
59. Row 2 / Column 7 → 9 (Full House)
60. Row 3 / Column 8 → 4 (Naked Single)
61. Row 1 / Column 8 → 3 (Full House)
62. Row 1 / Column 1 → 4 (Full House)
63. Row 3 / Column 6 → 9 (Full House)
64. Row 2 / Column 6 → 4 (Full House)
65. Row 2 / Column 1 → 6 (Full House)