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

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

Try To Solve This Puzzle

## Solution Steps:

1. Row 1 / Column 1 → 3 (Hidden Single)
2. Row 7 / Column 3 → 6 (Hidden Single)
3. Row 2 / Column 1 → 6 (Hidden Single)
4. Row 5 / Column 1 → 5 (Hidden Single)
5. Locked Triple: 3,6,8 in r456c5 => r5c4,r7c5<>3, r6c6,r8c5<>8, r5c4<>6
6. Row 8 / Column 9 → 8 (Hidden Single)
7. Row 9 / Column 9 → 1 (Naked Single)
8. Row 7 / Column 2 → 1 (Hidden Single)
9. Locked Candidates Type 1 (Pointing): 1 in b1 => r456c3<>1
10. Locked Candidates Type 1 (Pointing): 2 in b7 => r8c7<>2
11. Locked Candidates Type 1 (Pointing): 4 in b7 => r9c46<>4
12. Locked Candidates Type 1 (Pointing): 5 in b9 => r23c7<>5
13. Naked Pair: 2,5 in r2c49 => r2c237<>2, r2c25<>5
14. Row 2 / Column 2 → 4 (Naked Single)
15. Row 2 / Column 3 → 1 (Naked Single)
16. Row 9 / Column 1 → 4 (Hidden Single)
17. Locked Candidates Type 1 (Pointing): 5 in b2 => r7c4<>5
18. W-Wing: 5/7 in r7c5,r8c7 connected by 7 in r2c57 => r7c7,r8c5<>5
19. Row 7 / Column 5 → 5 (Hidden Single)
20. Row 8 / Column 7 → 5 (Hidden Single)
21. XY-Wing: 7/9/2 in r59c2,r8c1 => r46c1<>2
22. Row 4 / Column 1 → 1 (Naked Single)
23. Row 6 / Column 1 → 7 (Naked Single)
24. Row 8 / Column 1 → 2 (Full House)
25. Row 8 / Column 3 → 9 (Naked Single)
26. Row 8 / Column 5 → 7 (Full House)
27. Row 9 / Column 2 → 7 (Full House)
28. Row 2 / Column 5 → 9 (Naked Single)
29. Row 7 / Column 6 → 4 (Naked Single)
30. Row 9 / Column 8 → 3 (Naked Single)
31. Row 2 / Column 7 → 7 (Naked Single)
32. Row 7 / Column 4 → 3 (Naked Single)
33. Row 9 / Column 4 → 8 (Naked Single)
34. Row 9 / Column 6 → 9 (Full House)
35. Row 7 / Column 7 → 2 (Naked Single)
36. Row 7 / Column 8 → 7 (Full House)
37. Row 3 / Column 7 → 1 (Naked Single)
38. Row 6 / Column 7 → 3 (Naked Single)
39. Row 4 / Column 7 → 9 (Full House)
40. Row 4 / Column 8 → 2 (Naked Single)
41. Row 3 / Column 8 → 6 (Naked Single)
42. Row 4 / Column 9 → 4 (Naked Single)
43. Row 1 / Column 8 → 9 (Naked Single)
44. Row 5 / Column 8 → 1 (Full House)
45. Row 6 / Column 9 → 6 (Full House)
46. Row 5 / Column 6 → 2 (Naked Single)
47. Row 6 / Column 5 → 8 (Naked Single)
48. Row 1 / Column 6 → 8 (Naked Single)
49. Row 5 / Column 2 → 9 (Naked Single)
50. Row 5 / Column 4 → 4 (Naked Single)
51. Row 6 / Column 6 → 1 (Naked Single)
52. Row 3 / Column 6 → 7 (Full House)
53. Row 4 / Column 5 → 3 (Naked Single)
54. Row 4 / Column 3 → 8 (Full House)
55. Row 5 / Column 5 → 6 (Full House)
56. Row 5 / Column 3 → 3 (Full House)
57. Row 6 / Column 2 → 2 (Naked Single)
58. Row 6 / Column 3 → 4 (Full House)
59. Row 3 / Column 3 → 2 (Full House)
60. Row 1 / Column 2 → 5 (Naked Single)
61. Row 3 / Column 2 → 8 (Full House)
62. Row 3 / Column 4 → 5 (Full House)
63. Row 1 / Column 9 → 2 (Naked Single)
64. Row 1 / Column 4 → 6 (Full House)
65. Row 2 / Column 4 → 2 (Full House)
66. Row 2 / Column 9 → 5 (Full House)