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

This Sudoku Puzzle has 66 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Full House, Skyscraper, Locked Candidates Type 2 (Claiming), undefined, Naked Single techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 4 / Column 9 → 2 (Hidden Single)
2. Row 6 / Column 1 → 2 (Hidden Single)
3. Row 1 / Column 3 → 3 (Hidden Single)
4. Row 9 / Column 1 → 1 (Hidden Single)
5. Row 9 / Column 7 → 2 (Hidden Single)
6. Row 8 / Column 6 → 2 (Hidden Single)
7. Row 3 / Column 5 → 2 (Hidden Single)
8. Row 2 / Column 3 → 2 (Hidden Single)
9. Row 3 / Column 9 → 1 (Hidden Single)
10. Row 6 / Column 8 → 1 (Hidden Single)
11. Row 5 / Column 5 → 1 (Hidden Single)
12. Row 2 / Column 4 → 1 (Hidden Single)
13. Row 1 / Column 2 → 1 (Hidden Single)
14. Row 6 / Column 4 → 9 (Hidden Single)
15. Row 1 / Column 5 → 9 (Hidden Single)
16. Row 2 / Column 9 → 9 (Hidden Single)
17. Row 1 / Column 6 → 7 (Hidden Single)
18. Row 4 / Column 5 → 7 (Hidden Single)
19. Row 3 / Column 7 → 6 (Hidden Single)
20. Row 5 / Column 9 → 7 (Hidden Single)
21. Row 8 / Column 8 → 7 (Hidden Single)
22. Row 7 / Column 1 → 7 (Hidden Single)
23. Locked Candidates Type 1 (Pointing): 4 in b2 => r45c6<>4
24. Row 4 / Column 4 → 4 (Hidden Single)
25. Locked Candidates Type 1 (Pointing): 5 in b2 => r456c6<>5
26. Row 6 / Column 5 → 5 (Hidden Single)
27. Locked Candidates Type 1 (Pointing): 6 in b4 => r28c2<>6
28. Row 2 / Column 1 → 6 (Hidden Single)
29. Row 8 / Column 9 → 6 (Hidden Single)
30. Row 8 / Column 4 → 3 (Hidden Single)
31. Row 7 / Column 4 → 5 (Full House)
32. Row 7 / Column 9 → 3 (Hidden Single)
33. Locked Candidates Type 1 (Pointing): 8 in b7 => r5c3<>8
34. Locked Candidates Type 1 (Pointing): 5 in b9 => r9c3<>5
35. Skyscraper: 5 in r1c7,r3c3 (connected by r5c37) => r1c1<>5
36. Locked Candidates Type 2 (Claiming): 5 in r1 => r2c8<>5
37. W-Wing: 4/8 in r1c1,r7c7 connected by 8 in r19c9 => r1c7<>4
38. Row 1 / Column 1 → 4 (Hidden Single)
39. Row 7 / Column 7 → 4 (Hidden Single)
40. Row 7 / Column 5 → 6 (Naked Single)
41. Row 7 / Column 3 → 8 (Full House)
42. Row 9 / Column 5 → 4 (Full House)
43. Row 9 / Column 3 → 6 (Naked Single)
44. Row 2 / Column 8 → 4 (Hidden Single)
45. Row 2 / Column 6 → 5 (Naked Single)
46. Row 2 / Column 2 → 8 (Full House)
47. Row 3 / Column 6 → 4 (Full House)
48. Row 6 / Column 2 → 6 (Naked Single)
49. Row 4 / Column 2 → 5 (Naked Single)
50. Row 4 / Column 8 → 8 (Naked Single)
51. Row 4 / Column 6 → 6 (Full House)
52. Row 9 / Column 8 → 5 (Full House)
53. Row 9 / Column 9 → 8 (Full House)
54. Row 1 / Column 9 → 5 (Full House)
55. Row 1 / Column 7 → 8 (Full House)
56. Row 5 / Column 3 → 9 (Naked Single)
57. Row 3 / Column 3 → 5 (Full House)
58. Row 3 / Column 1 → 9 (Full House)
59. Row 8 / Column 2 → 9 (Naked Single)
60. Row 5 / Column 2 → 4 (Full House)
61. Row 5 / Column 1 → 8 (Full House)
62. Row 8 / Column 1 → 5 (Full House)
63. Row 6 / Column 7 → 3 (Naked Single)
64. Row 5 / Column 7 → 5 (Full House)
65. Row 5 / Column 6 → 3 (Full House)
66. Row 6 / Column 6 → 8 (Full House)