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

This Sudoku Puzzle has 64 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Skyscraper techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 2 / Column 1 → 6 (Naked Single)
2. Row 2 / Column 3 → 5 (Naked Single)
3. Row 2 / Column 9 → 2 (Naked Single)
4. Row 2 / Column 6 → 8 (Naked Single)
5. Row 2 / Column 7 → 4 (Full House)
6. Row 7 / Column 4 → 5 (Hidden Single)
7. Row 3 / Column 5 → 1 (Hidden Single)
8. Row 5 / Column 7 → 8 (Hidden Single)
9. Row 8 / Column 3 → 8 (Hidden Single)
10. Row 3 / Column 8 → 8 (Hidden Single)
11. Row 6 / Column 2 → 5 (Hidden Single)
12. Row 1 / Column 9 → 5 (Hidden Single)
13. Row 6 / Column 4 → 8 (Hidden Single)
14. Row 4 / Column 5 → 5 (Hidden Single)
15. Row 8 / Column 4 → 7 (Hidden Single)
16. Row 8 / Column 5 → 4 (Hidden Single)
17. Row 6 / Column 3 → 4 (Hidden Single)
18. Row 9 / Column 2 → 4 (Hidden Single)
19. Row 3 / Column 9 → 7 (Hidden Single)
20. Row 7 / Column 7 → 7 (Hidden Single)
21. Row 9 / Column 3 → 7 (Hidden Single)
22. Row 4 / Column 1 → 7 (Hidden Single)
23. Row 1 / Column 2 → 7 (Hidden Single)
24. Row 8 / Column 9 → 1 (Hidden Single)
25. Locked Candidates Type 1 (Pointing): 9 in b3 => r46c7<>9
26. Locked Candidates Type 1 (Pointing): 6 in b4 => r5c5<>6
27. Locked Candidates Type 1 (Pointing): 6 in b7 => r7c68<>6
28. Locked Candidates Type 1 (Pointing): 3 in b8 => r46c6<>3
29. Locked Candidates Type 2 (Claiming): 1 in r5 => r4c3,r6c1<>1
30. Locked Candidates Type 2 (Claiming): 6 in c4 => r1c5<>6
31. Naked Pair: 3,9 in r14c3 => r57c3<>3, r57c3<>9
32. Skyscraper: 3 in r3c2,r4c3 (connected by r34c4) => r1c3,r5c2<>3
33. Row 1 / Column 3 → 9 (Naked Single)
34. Row 3 / Column 2 → 3 (Full House)
35. Row 1 / Column 7 → 6 (Naked Single)
36. Row 3 / Column 7 → 9 (Full House)
37. Row 3 / Column 4 → 6 (Full House)
38. Row 4 / Column 3 → 3 (Naked Single)
39. Row 4 / Column 4 → 2 (Naked Single)
40. Row 1 / Column 4 → 3 (Full House)
41. Row 1 / Column 5 → 2 (Full House)
42. Row 4 / Column 7 → 1 (Naked Single)
43. Row 4 / Column 6 → 9 (Full House)
44. Row 6 / Column 7 → 2 (Full House)
45. Row 5 / Column 5 → 3 (Naked Single)
46. Row 6 / Column 1 → 9 (Naked Single)
47. Row 5 / Column 9 → 9 (Naked Single)
48. Row 6 / Column 9 → 3 (Full House)
49. Row 6 / Column 5 → 6 (Naked Single)
50. Row 6 / Column 6 → 1 (Full House)
51. Row 9 / Column 5 → 9 (Full House)
52. Row 5 / Column 2 → 6 (Naked Single)
53. Row 7 / Column 2 → 9 (Full House)
54. Row 8 / Column 1 → 3 (Naked Single)
55. Row 5 / Column 3 → 1 (Naked Single)
56. Row 5 / Column 1 → 2 (Full House)
57. Row 7 / Column 1 → 1 (Full House)
58. Row 7 / Column 3 → 6 (Full House)
59. Row 7 / Column 8 → 2 (Naked Single)
60. Row 7 / Column 6 → 3 (Full House)
61. Row 8 / Column 6 → 6 (Naked Single)
62. Row 8 / Column 8 → 9 (Full House)
63. Row 9 / Column 8 → 6 (Full House)
64. Row 9 / Column 6 → 2 (Full House)