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

This Sudoku Puzzle has 67 steps and it is solved using Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), Naked Single, Full House, Skyscraper, Naked Pair, Hidden Pair techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 1 → 1 (Hidden Single)
2. Row 5 / Column 6 → 7 (Hidden Single)
3. Row 2 / Column 4 → 7 (Hidden Single)
4. Row 8 / Column 2 → 2 (Hidden Single)
5. Locked Pair: 6,9 in r46c8 => r1289c8,r5c79<>6, r129c8,r5c79<>9
6. Locked Candidates Type 1 (Pointing): 2 in b4 => r123c3<>2
7. Row 2 / Column 6 → 2 (Hidden Single)
8. Locked Pair: 6,9 in r3c56 => r1c56,r3c1379<>6, r1c56,r3c379<>9
9. Locked Candidates Type 1 (Pointing): 1 in b2 => r1c78<>1
10. Locked Candidates Type 1 (Pointing): 4 in b6 => r5c35<>4
11. Row 6 / Column 3 → 4 (Hidden Single)
12. Row 6 / Column 5 → 2 (Hidden Single)
13. Row 5 / Column 3 → 2 (Hidden Single)
14. Row 6 / Column 6 → 1 (Hidden Single)
15. Row 1 / Column 6 → 4 (Naked Single)
16. Row 1 / Column 5 → 1 (Naked Single)
17. Row 6 / Column 2 → 8 (Hidden Single)
18. Row 4 / Column 6 → 8 (Hidden Single)
19. Row 7 / Column 5 → 4 (Hidden Single)
20. Row 8 / Column 4 → 6 (Naked Single)
21. Row 6 / Column 4 → 9 (Naked Single)
22. Row 4 / Column 4 → 4 (Full House)
23. Row 5 / Column 5 → 6 (Full House)
24. Row 6 / Column 8 → 6 (Full House)
25. Row 3 / Column 5 → 9 (Naked Single)
26. Row 3 / Column 6 → 6 (Full House)
27. Row 9 / Column 5 → 8 (Full House)
28. Row 5 / Column 2 → 9 (Naked Single)
29. Row 4 / Column 8 → 9 (Naked Single)
30. Row 8 / Column 7 → 8 (Hidden Single)
31. Row 8 / Column 9 → 4 (Hidden Single)
32. Row 5 / Column 9 → 5 (Naked Single)
33. Row 5 / Column 7 → 4 (Full House)
34. Skyscraper: 7 in r7c2,r9c8 (connected by r1c28) => r7c7,r9c1<>7
35. Naked Pair: 3,6 in r49c1 => r137c1<>3, r17c1<>6
36. Hidden Pair: 1,7 in r9c78 => r9c78<>5, r9c7<>6, r9c7<>9, r9c8<>3
37. Skyscraper: 5 in r7c2,r8c8 (connected by r2c28) => r7c7<>5
38. Row 8 / Column 8 → 5 (Hidden Single)
39. Row 8 / Column 6 → 3 (Full House)
40. Row 2 / Column 8 → 1 (Naked Single)
41. Row 9 / Column 8 → 7 (Naked Single)
42. Row 1 / Column 8 → 3 (Full House)
43. Row 9 / Column 7 → 1 (Naked Single)
44. Row 3 / Column 9 → 2 (Naked Single)
45. Row 3 / Column 1 → 7 (Naked Single)
46. Row 1 / Column 2 → 6 (Naked Single)
47. Row 3 / Column 7 → 5 (Naked Single)
48. Row 3 / Column 3 → 3 (Full House)
49. Row 7 / Column 1 → 8 (Naked Single)
50. Row 1 / Column 9 → 9 (Naked Single)
51. Row 2 / Column 2 → 5 (Naked Single)
52. Row 4 / Column 2 → 3 (Naked Single)
53. Row 4 / Column 1 → 6 (Full House)
54. Row 7 / Column 2 → 7 (Full House)
55. Row 1 / Column 1 → 2 (Naked Single)
56. Row 9 / Column 1 → 3 (Full House)
57. Row 1 / Column 3 → 8 (Naked Single)
58. Row 1 / Column 7 → 7 (Full House)
59. Row 2 / Column 7 → 6 (Full House)
60. Row 2 / Column 3 → 9 (Full House)
61. Row 7 / Column 7 → 9 (Full House)
62. Row 9 / Column 9 → 6 (Naked Single)
63. Row 7 / Column 9 → 3 (Full House)
64. Row 7 / Column 6 → 5 (Naked Single)
65. Row 7 / Column 3 → 6 (Full House)
66. Row 9 / Column 3 → 5 (Full House)
67. Row 9 / Column 6 → 9 (Full House)