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

This Sudoku Puzzle has 39 steps and it is solved using Locked Candidates Type 1 (Pointing), Naked Pair, Hidden Single, Naked Single, Full House, Skyscraper, Locked Pair techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Locked Candidates Type 1 (Pointing): 2 in b7 => r13c3<>2
2. Naked Pair: 8,9 in r8c57 => r8c38<>8, r8c8<>9
3. Row 1 / Column 8 → 9 (Hidden Single)
4. Row 9 / Column 8 → 8 (Hidden Single)
5. Row 8 / Column 7 → 9 (Naked Single)
6. Row 9 / Column 5 → 1 (Naked Single)
7. Row 5 / Column 7 → 5 (Naked Single)
8. Row 5 / Column 9 → 9 (Full House)
9. Row 8 / Column 5 → 8 (Naked Single)
10. Row 7 / Column 5 → 9 (Full House)
11. Row 7 / Column 7 → 4 (Naked Single)
12. Row 9 / Column 7 → 7 (Naked Single)
13. Row 2 / Column 7 → 6 (Naked Single)
14. Row 2 / Column 9 → 4 (Hidden Single)
15. Row 1 / Column 2 → 6 (Hidden Single)
16. Naked Pair: 3,5 in r7c29 => r7c3<>3, r7c3<>5
17. Skyscraper: 3 in r2c8,r7c9 (connected by r27c2) => r3c9,r8c8<>3
18. Row 8 / Column 8 → 2 (Naked Single)
19. Row 2 / Column 8 → 3 (Full House)
20. Row 8 / Column 3 → 3 (Full House)
21. Row 2 / Column 2 → 5 (Full House)
22. Row 7 / Column 2 → 5 (Full House)
23. Row 2 / Column 5 → 2 (Full House)
24. Row 9 / Column 9 → 5 (Naked Single)
25. Row 7 / Column 9 → 3 (Full House)
26. Row 9 / Column 3 → 2 (Full House)
27. Row 3 / Column 5 → 7 (Naked Single)
28. Row 1 / Column 5 → 5 (Full House)
29. Row 3 / Column 9 → 2 (Naked Single)
30. Row 1 / Column 9 → 7 (Full House)
31. Row 1 / Column 1 → 2 (Hidden Single)
32. Locked Pair: 1,8 in r13c3 => r3c1,r7c3<>1, r3c1,r7c3<>8
33. Row 7 / Column 3 → 8 (Naked Single)
34. Row 3 / Column 1 → 8 (Naked Single)
35. Row 1 / Column 3 → 1 (Naked Single)
36. Row 1 / Column 7 → 8 (Full House)
37. Row 3 / Column 7 → 1 (Full House)
38. Row 3 / Column 3 → 1 (Naked Single)
39. Row 7 / Column 1 → 1 (Naked Single)