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

This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, undefined, Naked Pair, Skyscraper, Full House, Empty Rectangle techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 3 → 4 (Naked Single)
2. Row 6 / Column 5 → 7 (Hidden Single)
3. Row 7 / Column 8 → 6 (Hidden Single)
4. Row 5 / Column 6 → 9 (Hidden Single)
5. Row 1 / Column 8 → 2 (Hidden Single)
6. Row 3 / Column 8 → 3 (Hidden Single)
7. Locked Candidates Type 1 (Pointing): 4 in b1 => r8c1<>4
8. Locked Candidates Type 1 (Pointing): 1 in b2 => r469c4<>1
9. Locked Candidates Type 1 (Pointing): 8 in b2 => r9c4<>8
10. Locked Candidates Type 1 (Pointing): 5 in b6 => r13c7<>5
11. Locked Candidates Type 2 (Claiming): 1 in c8 => r4c7,r6c9<>1
12. Locked Candidates Type 2 (Claiming): 4 in c8 => r4c7,r6c9<>4
13. Naked Triple: 2,5,8 in r347c2 => r89c2<>2, r8c2<>5, r9c2<>8
14. Locked Candidates Type 1 (Pointing): 5 in b7 => r7c6<>5
15. W-Wing: 8/2 in r6c3,r7c1 connected by 2 in r2c13 => r79c3<>8
16. Row 9 / Column 6 → 8 (Hidden Single)
17. Naked Pair: 1,2 in r67c6 => r48c6<>1, r48c6<>2
18. Skyscraper: 2 in r4c2,r6c6 (connected by r7c26) => r4c4,r6c3<>2
19. Row 6 / Column 3 → 8 (Naked Single)
20. Row 4 / Column 2 → 2 (Full House)
21. Row 6 / Column 9 → 6 (Naked Single)
22. Row 5 / Column 7 → 5 (Naked Single)
23. Row 5 / Column 4 → 6 (Full House)
24. Row 4 / Column 7 → 8 (Naked Single)
25. Row 3 / Column 7 → 6 (Hidden Single)
26. Empty Rectangle: 3 in b2 (r9c34) => r2c3<>3
27. W-Wing: 3/5 in r2c5,r4c6 connected by 5 in r8c56 => r4c5<>3
28. W-Wing: 3/2 in r8c1,r9c4 connected by 2 in r89c7 => r8c56,r9c3<>3
29. Row 8 / Column 6 → 5 (Naked Single)
30. Row 4 / Column 6 → 3 (Naked Single)
31. Row 8 / Column 5 → 1 (Naked Single)
32. Row 4 / Column 5 → 5 (Naked Single)
33. Row 2 / Column 5 → 3 (Full House)
34. Row 7 / Column 6 → 2 (Naked Single)
35. Row 6 / Column 6 → 1 (Full House)
36. Row 9 / Column 4 → 3 (Full House)
37. Row 4 / Column 4 → 4 (Naked Single)
38. Row 4 / Column 8 → 1 (Full House)
39. Row 6 / Column 8 → 4 (Full House)
40. Row 6 / Column 4 → 2 (Full House)
41. Row 7 / Column 1 → 8 (Naked Single)
42. Row 7 / Column 2 → 5 (Naked Single)
43. Row 7 / Column 3 → 1 (Full House)
44. Row 3 / Column 2 → 8 (Naked Single)
45. Row 9 / Column 3 → 2 (Naked Single)
46. Row 2 / Column 3 → 5 (Naked Single)
47. Row 1 / Column 3 → 3 (Full House)
48. Row 8 / Column 1 → 3 (Naked Single)
49. Row 2 / Column 4 → 8 (Naked Single)
50. Row 1 / Column 1 → 4 (Naked Single)
51. Row 2 / Column 1 → 2 (Full House)
52. Row 2 / Column 9 → 4 (Full House)
53. Row 1 / Column 7 → 1 (Naked Single)
54. Row 8 / Column 9 → 7 (Naked Single)
55. Row 1 / Column 4 → 5 (Naked Single)
56. Row 1 / Column 9 → 8 (Full House)
57. Row 3 / Column 9 → 5 (Full House)
58. Row 9 / Column 9 → 1 (Full House)
59. Row 3 / Column 4 → 1 (Full House)
60. Row 9 / Column 7 → 4 (Naked Single)
61. Row 8 / Column 7 → 2 (Full House)
62. Row 8 / Column 2 → 4 (Full House)
63. Row 9 / Column 2 → 7 (Full House)