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

This Sudoku Puzzle has 66 steps and it is solved using Hidden Pair, Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Hidden Pair: 3,6 in r2c36 => r2c36<>7, r2c36<>9, r2c6<>8
2. Hidden Pair: 1,3 in r7c28 => r7c2<>4, r7c2<>5, r7c2<>9, r7c8<>6
3. Row 6 / Column 8 → 6 (Hidden Single)
4. Row 7 / Column 8 → 3 (Hidden Single)
5. Row 7 / Column 2 → 1 (Naked Single)
6. Row 3 / Column 2 → 3 (Hidden Single)
7. Row 2 / Column 3 → 6 (Naked Single)
8. Row 2 / Column 6 → 3 (Naked Single)
9. Row 8 / Column 3 → 3 (Hidden Single)
10. Row 4 / Column 2 → 6 (Hidden Single)
11. Locked Candidates Type 1 (Pointing): 9 in b7 => r2346c1<>9
12. Locked Candidates Type 1 (Pointing): 9 in b1 => r1c4678<>9
13. Row 1 / Column 8 → 8 (Naked Single)
14. Row 2 / Column 9 → 7 (Naked Single)
15. Row 9 / Column 8 → 1 (Naked Single)
16. Row 1 / Column 7 → 4 (Naked Single)
17. Row 2 / Column 1 → 8 (Naked Single)
18. Row 1 / Column 2 → 9 (Naked Single)
19. Row 3 / Column 9 → 2 (Naked Single)
20. Row 1 / Column 3 → 7 (Naked Single)
21. Row 3 / Column 1 → 4 (Full House)
22. Row 3 / Column 8 → 9 (Naked Single)
23. Row 2 / Column 7 → 1 (Full House)
24. Row 5 / Column 8 → 2 (Full House)
25. Row 2 / Column 5 → 9 (Full House)
26. Row 9 / Column 7 → 7 (Hidden Single)
27. Row 6 / Column 1 → 7 (Hidden Single)
28. Locked Candidates Type 1 (Pointing): 4 in b7 => r9c6<>4
29. Locked Candidates Type 1 (Pointing): 8 in b9 => r8c45<>8
30. Row 8 / Column 5 → 5 (Naked Single)
31. Row 8 / Column 7 → 8 (Naked Single)
32. Row 8 / Column 9 → 6 (Naked Single)
33. Row 7 / Column 9 → 5 (Full House)
34. Row 6 / Column 9 → 4 (Naked Single)
35. Row 4 / Column 9 → 8 (Full House)
36. Row 7 / Column 1 → 9 (Naked Single)
37. Row 6 / Column 5 → 1 (Naked Single)
38. Row 8 / Column 1 → 2 (Naked Single)
39. Row 4 / Column 1 → 5 (Full House)
40. Row 8 / Column 4 → 9 (Full House)
41. Row 4 / Column 5 → 4 (Naked Single)
42. Row 9 / Column 3 → 4 (Naked Single)
43. Row 9 / Column 2 → 5 (Full House)
44. Row 5 / Column 2 → 4 (Full House)
45. Row 7 / Column 5 → 7 (Naked Single)
46. Row 3 / Column 5 → 8 (Full House)
47. Row 5 / Column 3 → 9 (Naked Single)
48. Row 7 / Column 4 → 6 (Naked Single)
49. Row 7 / Column 6 → 4 (Full House)
50. Row 3 / Column 6 → 7 (Naked Single)
51. Row 3 / Column 4 → 1 (Full House)
52. Row 5 / Column 7 → 5 (Naked Single)
53. Row 6 / Column 3 → 2 (Naked Single)
54. Row 4 / Column 3 → 1 (Full House)
55. Row 1 / Column 4 → 5 (Naked Single)
56. Row 1 / Column 6 → 6 (Full House)
57. Row 5 / Column 6 → 8 (Naked Single)
58. Row 5 / Column 4 → 7 (Full House)
59. Row 6 / Column 4 → 3 (Naked Single)
60. Row 9 / Column 6 → 2 (Naked Single)
61. Row 9 / Column 4 → 8 (Full House)
62. Row 4 / Column 4 → 2 (Full House)
63. Row 6 / Column 7 → 9 (Naked Single)
64. Row 4 / Column 7 → 3 (Full House)
65. Row 4 / Column 6 → 9 (Full House)
66. Row 6 / Column 6 → 5 (Full House)