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

This Sudoku Puzzle has 57 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Full House, Skyscraper techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 4 / Column 3 → 1 (Naked Single)
2. Row 1 / Column 3 → 2 (Hidden Single)
3. Row 6 / Column 3 → 9 (Hidden Single)
4. Row 7 / Column 4 → 9 (Hidden Single)
5. Row 9 / Column 9 → 9 (Hidden Single)
6. Row 7 / Column 6 → 2 (Hidden Single)
7. Row 2 / Column 4 → 2 (Hidden Single)
8. Row 9 / Column 8 → 5 (Hidden Single)
9. Row 3 / Column 8 → 2 (Hidden Single)
10. Row 1 / Column 4 → 3 (Hidden Single)
11. Row 3 / Column 1 → 9 (Hidden Single)
12. Row 2 / Column 8 → 9 (Hidden Single)
13. Locked Candidates Type 1 (Pointing): 8 in b1 => r9c1<>8
14. Locked Candidates Type 1 (Pointing): 4 in b2 => r2c7<>4
15. Row 6 / Column 7 → 4 (Hidden Single)
16. Row 4 / Column 8 → 8 (Naked Single)
17. Row 1 / Column 8 → 4 (Naked Single)
18. Row 1 / Column 9 → 8 (Hidden Single)
19. Row 2 / Column 1 → 8 (Hidden Single)
20. Row 2 / Column 5 → 4 (Naked Single)
21. Row 2 / Column 6 → 5 (Naked Single)
22. Row 2 / Column 7 → 1 (Naked Single)
23. Row 2 / Column 2 → 3 (Full House)
24. Row 3 / Column 7 → 5 (Full House)
25. Row 3 / Column 2 → 1 (Naked Single)
26. Row 9 / Column 1 → 1 (Hidden Single)
27. Skyscraper: 4 in r4c4,r9c6 (connected by r49c2) => r5c6,r8c4<>4
28. Row 8 / Column 4 → 8 (Naked Single)
29. Row 8 / Column 3 → 7 (Naked Single)
30. Row 5 / Column 3 → 3 (Naked Single)
31. Row 9 / Column 3 → 8 (Full House)
32. Row 8 / Column 8 → 6 (Naked Single)
33. Row 8 / Column 9 → 4 (Full House)
34. Row 9 / Column 2 → 4 (Naked Single)
35. Row 7 / Column 1 → 3 (Full House)
36. Row 5 / Column 8 → 1 (Naked Single)
37. Row 7 / Column 9 → 1 (Naked Single)
38. Row 7 / Column 5 → 7 (Full House)
39. Row 7 / Column 8 → 7 (Full House)
40. Row 4 / Column 2 → 5 (Naked Single)
41. Row 1 / Column 2 → 7 (Full House)
42. Row 4 / Column 4 → 4 (Full House)
43. Row 1 / Column 1 → 5 (Full House)
44. Row 9 / Column 6 → 7 (Naked Single)
45. Row 6 / Column 8 → 3 (Naked Single)
46. Row 9 / Column 5 → 3 (Naked Single)
47. Row 6 / Column 1 → 7 (Naked Single)
48. Row 5 / Column 1 → 4 (Full House)
49. Row 5 / Column 4 → 5 (Naked Single)
50. Row 5 / Column 6 → 6 (Full House)
51. Row 5 / Column 9 → 6 (Full House)
52. Row 6 / Column 4 → 1 (Full House)
53. Row 6 / Column 5 → 8 (Full House)
54. Row 6 / Column 6 → 8 (Full House)
55. Row 3 / Column 5 → 6 (Full House)
56. Row 3 / Column 6 → 8 (Full House)
57. Row 6 / Column 9 → 5 (Naked Single)