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

This Sudoku Puzzle has 57 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Single, Skyscraper, Locked Candidates Type 2 (Claiming), Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 2 / Column 6 → 9 (Hidden Single)
2. Row 5 / Column 5 → 3 (Hidden Single)
3. Row 8 / Column 6 → 3 (Hidden Single)
4. Row 8 / Column 2 → 1 (Hidden Single)
5. Row 9 / Column 5 → 8 (Hidden Single)
6. Row 8 / Column 1 → 2 (Hidden Single)
7. Row 4 / Column 2 → 6 (Hidden Single)
8. Row 1 / Column 6 → 8 (Hidden Single)
9. Row 8 / Column 8 → 6 (Hidden Single)
10. Row 7 / Column 3 → 6 (Hidden Single)
11. Row 6 / Column 2 → 2 (Hidden Single)
12. Row 4 / Column 4 → 8 (Hidden Single)
13. Row 3 / Column 6 → 5 (Hidden Single)
14. Row 5 / Column 1 → 8 (Hidden Single)
15. Locked Candidates Type 1 (Pointing): 4 in b2 => r7c5<>4
16. Locked Candidates Type 1 (Pointing): 7 in b2 => r47c5<>7
17. Locked Candidates Type 1 (Pointing): 5 in b3 => r7c8<>5
18. Locked Candidates Type 1 (Pointing): 7 in b6 => r6c146<>7
19. Row 6 / Column 6 → 4 (Naked Single)
20. Row 5 / Column 2 → 4 (Hidden Single)
21. Row 7 / Column 4 → 4 (Hidden Single)
22. Row 9 / Column 1 → 4 (Hidden Single)
23. Locked Candidates Type 1 (Pointing): 7 in b4 => r9c3<>7
24. Skyscraper: 7 in r2c8,r9c9 (connected by r29c2) => r3c9,r7c8<>7
25. Locked Candidates Type 2 (Claiming): 7 in c9 => r7c7<>7
26. Skyscraper: 9 in r7c1,r8c4 (connected by r6c14) => r7c5<>9
27. Row 7 / Column 5 → 2 (Naked Single)
28. Row 4 / Column 5 → 9 (Naked Single)
29. Row 7 / Column 6 → 7 (Naked Single)
30. Row 4 / Column 6 → 2 (Full House)
31. Row 4 / Column 3 → 7 (Full House)
32. Row 8 / Column 4 → 9 (Full House)
33. Row 8 / Column 9 → 7 (Full House)
34. Row 6 / Column 4 → 5 (Naked Single)
35. Row 5 / Column 4 → 7 (Full House)
36. Row 5 / Column 3 → 5 (Full House)
37. Row 6 / Column 1 → 9 (Full House)
38. Row 9 / Column 3 → 9 (Full House)
39. Row 7 / Column 1 → 5 (Naked Single)
40. Row 9 / Column 2 → 7 (Full House)
41. Row 9 / Column 9 → 5 (Full House)
42. Row 2 / Column 2 → 5 (Full House)
43. Row 2 / Column 8 → 7 (Full House)
44. Row 1 / Column 7 → 6 (Naked Single)
45. Row 6 / Column 8 → 8 (Naked Single)
46. Row 6 / Column 7 → 7 (Full House)
47. Row 1 / Column 1 → 7 (Naked Single)
48. Row 3 / Column 1 → 6 (Full House)
49. Row 3 / Column 7 → 9 (Naked Single)
50. Row 7 / Column 7 → 8 (Full House)
51. Row 7 / Column 8 → 1 (Naked Single)
52. Row 7 / Column 9 → 9 (Full House)
53. Row 3 / Column 9 → 1 (Full House)
54. Row 1 / Column 5 → 4 (Naked Single)
55. Row 1 / Column 8 → 5 (Full House)
56. Row 3 / Column 8 → 4 (Full House)
57. Row 3 / Column 5 → 7 (Full House)