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

This Sudoku Puzzle has 49 steps and it is solved using Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Skyscraper, Naked Single techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 3 / Column 1 → 2 (Hidden Single)
2. Row 5 / Column 1 → 7 (Hidden Single)
3. Row 1 / Column 7 → 4 (Hidden Single)
4. Row 7 / Column 9 → 7 (Hidden Single)
5. Row 9 / Column 3 → 4 (Hidden Single)
6. Row 3 / Column 8 → 7 (Hidden Single)
7. Row 6 / Column 8 → 2 (Hidden Single)
8. Row 3 / Column 9 → 8 (Hidden Single)
9. Row 1 / Column 1 → 8 (Hidden Single)
10. Row 5 / Column 9 → 4 (Hidden Single)
11. Row 4 / Column 1 → 4 (Hidden Single)
12. Row 8 / Column 4 → 4 (Hidden Single)
13. Row 2 / Column 5 → 4 (Hidden Single)
14. Row 7 / Column 2 → 2 (Hidden Single)
15. Row 9 / Column 9 → 2 (Hidden Single)
16. Row 1 / Column 3 → 3 (Hidden Single)
17. Row 6 / Column 9 → 1 (Hidden Single)
18. Row 4 / Column 2 → 3 (Hidden Single)
19. Row 7 / Column 1 → 5 (Hidden Single)
20. Row 7 / Column 5 → 8 (Hidden Single)
21. Row 8 / Column 2 → 8 (Hidden Single)
22. Row 5 / Column 8 → 9 (Hidden Single)
23. Row 5 / Column 2 → 5 (Full House)
24. Row 9 / Column 1 → 3 (Hidden Single)
25. Locked Candidates Type 1 (Pointing): 1 in b1 => r2c8<>1
26. Skyscraper: 1 in r1c8,r7c7 (connected by r17c4) => r3c7,r8c8<>1
27. Row 3 / Column 5 → 1 (Hidden Single)
28. Row 1 / Column 4 → 9 (Full House)
29. Row 8 / Column 5 → 9 (Full House)
30. Row 7 / Column 4 → 1 (Full House)
31. Row 1 / Column 9 → 5 (Naked Single)
32. Row 1 / Column 8 → 1 (Full House)
33. Row 4 / Column 9 → 6 (Naked Single)
34. Row 4 / Column 8 → 5 (Full House)
35. Row 8 / Column 9 → 3 (Naked Single)
36. Row 2 / Column 9 → 9 (Full House)
37. Row 8 / Column 8 → 6 (Naked Single)
38. Row 2 / Column 8 → 3 (Full House)
39. Row 3 / Column 7 → 6 (Full House)
40. Row 8 / Column 1 → 1 (Full House)
41. Row 3 / Column 3 → 9 (Full House)
42. Row 7 / Column 3 → 6 (Full House)
43. Row 7 / Column 7 → 9 (Full House)
44. Row 9 / Column 2 → 9 (Full House)
45. Row 9 / Column 7 → 1 (Full House)
46. Row 2 / Column 1 → 6 (Naked Single)
47. Row 2 / Column 2 → 1 (Full House)
48. Row 6 / Column 2 → 6 (Full House)
49. Row 6 / Column 1 → 9 (Full House)
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