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

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

Try To Solve This Puzzle

## Solution Steps:

1. Row 4 / Column 8 → 1 (Naked Single)
2. Row 6 / Column 8 → 6 (Naked Single)
3. Row 2 / Column 8 → 7 (Naked Single)
4. Row 1 / Column 8 → 3 (Naked Single)
5. Row 8 / Column 8 → 5 (Full House)
6. Row 8 / Column 7 → 3 (Naked Single)
7. Row 9 / Column 7 → 1 (Naked Single)
8. Row 7 / Column 7 → 9 (Naked Single)
9. Row 4 / Column 7 → 8 (Naked Single)
10. Row 3 / Column 7 → 4 (Naked Single)
11. Row 4 / Column 6 → 4 (Naked Single)
12. Row 5 / Column 7 → 5 (Naked Single)
13. Row 5 / Column 9 → 9 (Full House)
14. Row 1 / Column 7 → 6 (Full House)
15. Row 4 / Column 4 → 2 (Naked Single)
16. Row 2 / Column 2 → 6 (Hidden Single)
17. Row 3 / Column 5 → 3 (Hidden Single)
18. Row 2 / Column 4 → 9 (Hidden Single)
19. Locked Candidates Type 1 (Pointing): 7 in b2 => r1c123<>7
20. Locked Candidates Type 2 (Claiming): 2 in r8 => r7c123,r9c123<>2
21. Row 1 / Column 3 → 2 (Hidden Single)
22. Hidden Pair: 5,6 in r79c1 => r7c1<>1, r7c1<>4, r79c1<>7, r9c1<>8
23. Row 7 / Column 3 → 1 (Hidden Single)
24. Row 2 / Column 6 → 1 (Hidden Single)
25. Row 6 / Column 4 → 1 (Hidden Single)
26. Locked Candidates Type 1 (Pointing): 3 in b5 => r7c6<>3
27. W-Wing: 8/4 in r2c5,r5c1 connected by 4 in r25c3 => r5c5<>8
28. Row 5 / Column 5 → 6 (Naked Single)
29. Row 7 / Column 6 → 6 (Hidden Single)
30. Row 7 / Column 1 → 5 (Naked Single)
31. Row 9 / Column 1 → 6 (Naked Single)
32. Row 1 / Column 6 → 5 (Hidden Single)
33. Row 9 / Column 4 → 5 (Hidden Single)
34. Row 1 / Column 5 → 7 (Hidden Single)
35. Row 8 / Column 6 → 7 (Hidden Single)
36. Row 7 / Column 4 → 3 (Hidden Single)
37. Naked Triple: 2,4,8 in r568c1 => r1c1<>4, r13c1<>8
38. Skyscraper: 4 in r1c4,r7c5 (connected by r17c2) => r2c5,r8c4<>4
39. Row 2 / Column 5 → 8 (Naked Single)
40. Row 1 / Column 4 → 4 (Full House)
41. Row 8 / Column 4 → 8 (Full House)
42. Row 2 / Column 3 → 4 (Full House)
43. Row 9 / Column 5 → 2 (Naked Single)
44. Row 7 / Column 5 → 4 (Full House)
45. Row 9 / Column 9 → 7 (Naked Single)
46. Row 7 / Column 9 → 2 (Full House)
47. Row 7 / Column 2 → 7 (Full House)
48. Row 4 / Column 2 → 9 (Naked Single)
49. Row 4 / Column 1 → 7 (Full House)
50. Row 1 / Column 2 → 8 (Naked Single)
51. Row 3 / Column 1 → 1 (Naked Single)
52. Row 1 / Column 9 → 1 (Naked Single)
53. Row 1 / Column 1 → 9 (Full House)
54. Row 3 / Column 3 → 7 (Full House)
55. Row 3 / Column 9 → 8 (Full House)
56. Row 9 / Column 2 → 3 (Naked Single)
57. Row 9 / Column 3 → 8 (Full House)
58. Row 5 / Column 3 → 3 (Full House)
59. Row 6 / Column 2 → 2 (Naked Single)
60. Row 8 / Column 2 → 4 (Full House)
61. Row 8 / Column 1 → 2 (Full House)
62. Row 5 / Column 6 → 8 (Naked Single)
63. Row 5 / Column 1 → 4 (Full House)
64. Row 6 / Column 1 → 8 (Full House)
65. Row 6 / Column 6 → 3 (Full House)