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

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

Try To Solve This Puzzle

## Solution Steps:

1. Row 2 / Column 4 → 6 (Naked Single)
2. Row 2 / Column 6 → 8 (Hidden Single)
3. Row 8 / Column 2 → 8 (Hidden Single)
4. Row 8 / Column 4 → 7 (Hidden Single)
5. Row 3 / Column 6 → 4 (Hidden Single)
6. Row 2 / Column 9 → 5 (Hidden Single)
7. Row 8 / Column 6 → 5 (Hidden Single)
8. Row 1 / Column 5 → 5 (Hidden Single)
9. Row 1 / Column 1 → 8 (Hidden Single)
10. Row 6 / Column 7 → 5 (Hidden Single)
11. Row 4 / Column 1 → 5 (Hidden Single)
12. Row 7 / Column 3 → 5 (Hidden Single)
13. Row 9 / Column 1 → 4 (Hidden Single)
14. Row 8 / Column 3 → 6 (Naked Single)
15. Row 8 / Column 5 → 9 (Naked Single)
16. Row 8 / Column 8 → 4 (Full House)
17. Row 3 / Column 5 → 1 (Naked Single)
18. Row 1 / Column 4 → 9 (Full House)
19. Row 4 / Column 2 → 7 (Hidden Single)
20. Row 1 / Column 9 → 4 (Hidden Single)
21. Row 6 / Column 6 → 9 (Hidden Single)
22. Row 2 / Column 3 → 4 (Hidden Single)
23. Locked Candidates Type 1 (Pointing): 3 in b8 => r5c5<>3
24. Locked Candidates Type 2 (Claiming): 1 in c1 => r5c3,r6c2<>1
25. X-Wing: 2 r26 c28 => r1c28,r457c8<>2
26. Skyscraper: 7 in r1c8,r3c1 (connected by r7c18) => r1c3,r3c7<>7
27. W-Wing: 3/2 in r2c8,r5c3 connected by 2 in r1c37 => r5c8<>3
28. AIC: 2 2- r5c3 =2= r1c3 =1= r1c2 =6= r6c2 =2= r6c8 -2 => r5c79,r6c2<>2
29. Row 6 / Column 8 → 2 (Hidden Single)
30. Row 2 / Column 8 → 3 (Naked Single)
31. Row 2 / Column 2 → 2 (Full House)
32. Row 1 / Column 3 → 1 (Naked Single)
33. Row 1 / Column 2 → 6 (Naked Single)
34. Row 1 / Column 8 → 7 (Naked Single)
35. Row 1 / Column 7 → 2 (Full House)
36. Row 6 / Column 2 → 3 (Naked Single)
37. Row 5 / Column 3 → 2 (Naked Single)
38. Row 6 / Column 4 → 1 (Naked Single)
39. Row 4 / Column 4 → 3 (Full House)
40. Row 6 / Column 1 → 6 (Full House)
41. Row 5 / Column 1 → 1 (Full House)
42. Row 7 / Column 2 → 9 (Naked Single)
43. Row 9 / Column 2 → 1 (Full House)
44. Row 5 / Column 5 → 6 (Naked Single)
45. Row 4 / Column 6 → 2 (Full House)
46. Row 9 / Column 6 → 6 (Full House)
47. Row 4 / Column 9 → 6 (Naked Single)
48. Row 4 / Column 8 → 1 (Full House)
49. Row 7 / Column 8 → 6 (Naked Single)
50. Row 5 / Column 8 → 9 (Full House)
51. Row 3 / Column 9 → 9 (Naked Single)
52. Row 3 / Column 7 → 6 (Full House)
53. Row 5 / Column 7 → 8 (Naked Single)
54. Row 5 / Column 9 → 3 (Full House)
55. Row 9 / Column 9 → 2 (Naked Single)
56. Row 7 / Column 9 → 8 (Full House)
57. Row 7 / Column 7 → 7 (Naked Single)
58. Row 9 / Column 7 → 9 (Full House)
59. Row 9 / Column 5 → 3 (Naked Single)
60. Row 7 / Column 5 → 2 (Full House)
61. Row 7 / Column 1 → 3 (Full House)
62. Row 9 / Column 3 → 7 (Full House)
63. Row 3 / Column 1 → 7 (Full House)
64. Row 3 / Column 3 → 3 (Full House)