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

This Sudoku Puzzle has 60 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, undefined, Skyscraper techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 4 / Column 6 → 3 (Naked Single)
2. Row 5 / Column 6 → 4 (Naked Single)
3. Row 5 / Column 4 → 7 (Naked Single)
4. Row 6 / Column 4 → 6 (Full House)
5. Row 5 / Column 2 → 9 (Naked Single)
6. Row 4 / Column 3 → 7 (Hidden Single)
7. Row 1 / Column 3 → 5 (Hidden Single)
8. Row 5 / Column 3 → 8 (Naked Single)
9. Row 5 / Column 8 → 5 (Naked Single)
10. Row 5 / Column 7 → 3 (Full House)
11. Row 4 / Column 1 → 5 (Hidden Single)
12. Row 9 / Column 7 → 7 (Hidden Single)
13. Row 2 / Column 5 → 4 (Hidden Single)
14. Row 9 / Column 8 → 4 (Hidden Single)
15. Row 6 / Column 9 → 4 (Hidden Single)
16. Row 3 / Column 3 → 3 (Hidden Single)
17. Row 2 / Column 9 → 7 (Hidden Single)
18. Row 8 / Column 4 → 4 (Hidden Single)
19. Row 6 / Column 7 → 8 (Hidden Single)
20. Locked Candidates Type 1 (Pointing): 2 in b8 => r9c13<>2
21. Naked Pair: 8,9 in r7c8,r8c9 => r78c7<>9
22. W-Wing: 1/2 in r2c1,r6c3 connected by 2 in r8c13 => r2c3<>1
23. XY-Wing: 1/8/6 in r7c2,r9c15 => r7c56,r9c3<>6
24. Row 7 / Column 2 → 6 (Hidden Single)
25. Row 2 / Column 3 → 6 (Hidden Single)
26. Row 1 / Column 7 → 6 (Hidden Single)
27. W-Wing: 1/2 in r2c1,r3c4 connected by 2 in r2c7,r3c8 => r2c6,r3c2<>1
28. Row 2 / Column 1 → 1 (Hidden Single)
29. Row 9 / Column 1 → 8 (Naked Single)
30. Row 8 / Column 1 → 2 (Full House)
31. Row 9 / Column 5 → 6 (Naked Single)
32. Row 6 / Column 2 → 1 (Hidden Single)
33. Row 6 / Column 3 → 2 (Full House)
34. Row 3 / Column 6 → 6 (Hidden Single)
35. Row 3 / Column 4 → 1 (Hidden Single)
36. Skyscraper: 8 in r3c8,r8c9 (connected by r38c5) => r1c9,r7c8<>8
37. Row 1 / Column 9 → 9 (Naked Single)
38. Row 8 / Column 9 → 8 (Full House)
39. Row 7 / Column 8 → 9 (Naked Single)
40. Row 2 / Column 7 → 2 (Naked Single)
41. Row 2 / Column 6 → 9 (Full House)
42. Row 3 / Column 8 → 8 (Full House)
43. Row 4 / Column 8 → 2 (Full House)
44. Row 4 / Column 7 → 9 (Full House)
45. Row 8 / Column 5 → 5 (Naked Single)
46. Row 7 / Column 4 → 3 (Naked Single)
47. Row 3 / Column 5 → 7 (Naked Single)
48. Row 3 / Column 2 → 2 (Full House)
49. Row 1 / Column 2 → 7 (Full House)
50. Row 8 / Column 7 → 1 (Naked Single)
51. Row 7 / Column 7 → 5 (Full House)
52. Row 8 / Column 3 → 9 (Full House)
53. Row 9 / Column 3 → 1 (Full House)
54. Row 1 / Column 4 → 2 (Naked Single)
55. Row 9 / Column 4 → 9 (Full House)
56. Row 9 / Column 6 → 2 (Full House)
57. Row 7 / Column 5 → 8 (Naked Single)
58. Row 1 / Column 5 → 3 (Full House)
59. Row 1 / Column 6 → 8 (Full House)
60. Row 7 / Column 6 → 1 (Full House)