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

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

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 5 → 7 (Naked Single)
2. Row 5 / Column 7 → 4 (Naked Single)
3. Row 6 / Column 4 → 3 (Naked Single)
4. Row 6 / Column 6 → 1 (Naked Single)
5. Row 5 / Column 9 → 5 (Hidden Single)
6. Row 1 / Column 3 → 4 (Hidden Single)
7. Row 1 / Column 5 → 6 (Hidden Single)
8. Row 1 / Column 7 → 7 (Hidden Single)
9. Row 3 / Column 4 → 5 (Hidden Single)
10. Row 8 / Column 8 → 5 (Hidden Single)
11. Row 7 / Column 1 → 5 (Hidden Single)
12. Row 1 / Column 2 → 5 (Hidden Single)
13. Locked Candidates Type 1 (Pointing): 9 in b5 => r4c12<>9
14. Locked Candidates Type 1 (Pointing): 8 in b6 => r6c23<>8
15. Naked Triple: 3,4,7 in r8c246 => r8c19<>3, r8c1<>7, r8c9<>4
16. Row 9 / Column 9 → 4 (Hidden Single)
17. Naked Triple: 2,3,7 in r468c2 => r2c2<>2, r29c2<>3, r29c2<>7
18. Row 2 / Column 1 → 7 (Hidden Single)
19. Locked Candidates Type 1 (Pointing): 2 in b1 => r4c1<>2
20. Naked Pair: 8,9 in r2c24 => r2c689<>8, r2c689<>9
21. Naked Pair: 2,3 in r2c6,r3c5 => r1c6<>2, r1c6<>3
22. Naked Triple: 3,8,9 in r357c3 => r9c3<>3, r9c3<>8, r9c3<>9
23. X-Wing: 8 c24 r29 => r9c1<>8
24. Swordfish: 3 c357 r379 => r3c19,r7c69,r9c1<>3
25. Locked Candidates Type 1 (Pointing): 3 in b9 => r3c7<>3
26. Swordfish: 9 r357 c139 => r1c19,r9c1<>9
27. Locked Pair: 1,6 in r89c1 => r4c1,r9c3<>6
28. Row 4 / Column 1 → 3 (Naked Single)
29. Row 9 / Column 3 → 7 (Naked Single)
30. Row 4 / Column 2 → 2 (Naked Single)
31. Row 6 / Column 3 → 6 (Naked Single)
32. Row 8 / Column 2 → 3 (Naked Single)
33. Row 9 / Column 4 → 8 (Naked Single)
34. Row 6 / Column 2 → 7 (Naked Single)
35. Row 8 / Column 6 → 4 (Naked Single)
36. Row 2 / Column 4 → 9 (Naked Single)
37. Row 7 / Column 6 → 2 (Naked Single)
38. Row 9 / Column 2 → 9 (Naked Single)
39. Row 2 / Column 2 → 8 (Full House)
40. Row 4 / Column 6 → 9 (Naked Single)
41. Row 4 / Column 4 → 4 (Full House)
42. Row 8 / Column 4 → 7 (Full House)
43. Row 1 / Column 6 → 8 (Naked Single)
44. Row 2 / Column 6 → 3 (Full House)
45. Row 3 / Column 5 → 2 (Full House)
46. Row 7 / Column 3 → 8 (Naked Single)
47. Row 1 / Column 1 → 2 (Naked Single)
48. Row 3 / Column 1 → 9 (Naked Single)
49. Row 3 / Column 3 → 3 (Full House)
50. Row 5 / Column 3 → 9 (Full House)
51. Row 5 / Column 1 → 8 (Full House)
52. Row 3 / Column 7 → 1 (Naked Single)
53. Row 3 / Column 9 → 8 (Full House)
54. Row 1 / Column 8 → 9 (Naked Single)
55. Row 1 / Column 9 → 3 (Full House)
56. Row 4 / Column 7 → 6 (Naked Single)
57. Row 4 / Column 8 → 1 (Full House)
58. Row 7 / Column 7 → 3 (Naked Single)
59. Row 9 / Column 7 → 2 (Full House)
60. Row 6 / Column 9 → 2 (Naked Single)
61. Row 6 / Column 8 → 8 (Full House)
62. Row 7 / Column 5 → 1 (Naked Single)
63. Row 7 / Column 9 → 9 (Full House)
64. Row 9 / Column 5 → 3 (Full House)
65. Row 9 / Column 8 → 6 (Naked Single)
66. Row 2 / Column 8 → 2 (Full House)
67. Row 2 / Column 9 → 6 (Full House)
68. Row 8 / Column 9 → 1 (Full House)
69. Row 9 / Column 1 → 1 (Full House)
70. Row 8 / Column 1 → 6 (Full House)