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

This Sudoku Puzzle has 67 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Skyscraper, undefined, Hidden Rectangle, AIC, Locked Candidates Type 2 (Claiming) techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 7 / Column 2 → 5 (Naked Single)
2. Row 6 / Column 9 → 5 (Hidden Single)
3. Row 2 / Column 6 → 9 (Hidden Single)
4. Row 7 / Column 3 → 8 (Hidden Single)
5. Row 9 / Column 8 → 5 (Hidden Single)
6. Row 6 / Column 7 → 6 (Hidden Single)
7. Row 8 / Column 7 → 7 (Naked Single)
8. Row 7 / Column 8 → 6 (Naked Single)
9. Row 7 / Column 9 → 4 (Naked Single)
10. Row 8 / Column 9 → 9 (Naked Single)
11. Row 9 / Column 7 → 3 (Full House)
12. Row 5 / Column 7 → 8 (Naked Single)
13. Row 2 / Column 7 → 4 (Naked Single)
14. Row 4 / Column 7 → 2 (Full House)
15. Row 5 / Column 8 → 9 (Hidden Single)
16. Row 4 / Column 1 → 9 (Hidden Single)
17. Row 4 / Column 6 → 8 (Hidden Single)
18. Row 9 / Column 2 → 9 (Hidden Single)
19. Locked Candidates Type 1 (Pointing): 3 in b6 => r123c9<>3
20. Locked Candidates Type 1 (Pointing): 7 in b6 => r123c9<>7
21. Locked Candidates Type 1 (Pointing): 2 in b7 => r8c6<>2
22. Skyscraper: 4 in r1c5,r3c3 (connected by r4c35) => r1c1,r3c46<>4
23. W-Wing: 3/7 in r5c9,r6c5 connected by 7 in r4c59 => r5c6<>3
24. Locked Candidates Type 1 (Pointing): 3 in b5 => r12c5<>3
25. Hidden Rectangle: 4/6 in r5c46,r9c46 => r5c4<>4
26. AIC: 4 4- r3c3 =4= r3c1 =5= r3c6 -5- r8c6 -6- r9c6 -4- r5c6 =4= r5c1 -4 => r3c1,r4c3<>4
27. Row 4 / Column 3 → 3 (Naked Single)
28. Row 4 / Column 9 → 7 (Naked Single)
29. Row 4 / Column 5 → 4 (Full House)
30. Row 5 / Column 9 → 3 (Full House)
31. Row 6 / Column 3 → 2 (Naked Single)
32. Row 6 / Column 1 → 7 (Naked Single)
33. Row 6 / Column 5 → 3 (Full House)
34. Row 5 / Column 2 → 1 (Naked Single)
35. Row 5 / Column 1 → 4 (Full House)
36. Row 3 / Column 3 → 4 (Hidden Single)
37. Row 2 / Column 8 → 3 (Hidden Single)
38. Row 8 / Column 1 → 2 (Hidden Single)
39. Locked Candidates Type 2 (Claiming): 7 in r2 => r1c456,r3c46<>7
40. Row 1 / Column 5 → 1 (Naked Single)
41. Row 8 / Column 5 → 5 (Naked Single)
42. Row 2 / Column 5 → 7 (Full House)
43. Row 8 / Column 6 → 6 (Naked Single)
44. Row 8 / Column 3 → 1 (Full House)
45. Row 2 / Column 3 → 6 (Full House)
46. Row 9 / Column 1 → 6 (Full House)
47. Row 2 / Column 4 → 8 (Naked Single)
48. Row 5 / Column 6 → 7 (Naked Single)
49. Row 5 / Column 4 → 6 (Full House)
50. Row 9 / Column 6 → 4 (Naked Single)
51. Row 9 / Column 4 → 1 (Full House)
52. Row 1 / Column 1 → 8 (Naked Single)
53. Row 2 / Column 9 → 1 (Naked Single)
54. Row 2 / Column 1 → 5 (Full House)
55. Row 3 / Column 1 → 1 (Full House)
56. Row 3 / Column 4 → 2 (Naked Single)
57. Row 7 / Column 6 → 2 (Naked Single)
58. Row 7 / Column 4 → 7 (Full House)
59. Row 1 / Column 4 → 4 (Full House)
60. Row 1 / Column 9 → 6 (Naked Single)
61. Row 3 / Column 9 → 8 (Full House)
62. Row 1 / Column 6 → 3 (Naked Single)
63. Row 3 / Column 6 → 5 (Full House)
64. Row 3 / Column 8 → 7 (Naked Single)
65. Row 1 / Column 8 → 2 (Full House)
66. Row 1 / Column 2 → 7 (Full House)
67. Row 3 / Column 2 → 3 (Full House)