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

This Sudoku Puzzle has 67 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, undefined techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 4 / Column 9 → 3 (Naked Single)
2. Row 4 / Column 7 → 2 (Naked Single)
3. Row 4 / Column 3 → 7 (Naked Single)
4. Row 4 / Column 1 → 6 (Naked Single)
5. Row 4 / Column 5 → 8 (Full House)
6. Row 5 / Column 2 → 8 (Hidden Single)
7. Row 7 / Column 4 → 6 (Hidden Single)
8. Row 6 / Column 6 → 7 (Hidden Single)
9. Row 2 / Column 7 → 3 (Hidden Single)
10. Row 6 / Column 5 → 6 (Hidden Single)
11. Row 1 / Column 6 → 8 (Hidden Single)
12. Row 6 / Column 2 → 3 (Hidden Single)
13. Row 8 / Column 9 → 6 (Hidden Single)
14. Row 2 / Column 9 → 8 (Hidden Single)
15. Row 9 / Column 7 → 8 (Hidden Single)
16. Locked Pair: 4,9 in r1c79 => r1c24,r3c79<>9, r13c8,r3c79<>4
17. Row 1 / Column 4 → 7 (Naked Single)
18. Locked Pair: 1,5 in r3c79 => r23c8,r3c45<>1, r23c8,r3c46<>5
19. Row 3 / Column 4 → 9 (Naked Single)
20. Row 5 / Column 4 → 3 (Naked Single)
21. Row 5 / Column 6 → 9 (Full House)
22. Row 2 / Column 4 → 5 (Hidden Single)
23. Row 9 / Column 4 → 1 (Full House)
24. Row 9 / Column 6 → 3 (Hidden Single)
25. Row 2 / Column 5 → 1 (Hidden Single)
26. Locked Candidates Type 1 (Pointing): 2 in b2 => r3c28<>2
27. Locked Candidates Type 1 (Pointing): 1 in b4 => r8c3<>1
28. Locked Candidates Type 1 (Pointing): 2 in b8 => r8c123<>2
29. Locked Candidates Type 2 (Claiming): 9 in c2 => r8c13,r9c1<>9
30. Row 8 / Column 3 → 4 (Naked Single)
31. Locked Candidates Type 1 (Pointing): 4 in b8 => r7c8<>4
32. Locked Candidates Type 2 (Claiming): 5 in c8 => r8c7,r9c9<>5
33. Naked Pair: 4,9 in r19c9 => r6c9<>4
34. W-Wing: 1/9 in r7c2,r8c7 connected by 9 in r9c29 => r7c8,r8c2<>1
35. Row 7 / Column 8 → 5 (Naked Single)
36. Row 7 / Column 6 → 4 (Naked Single)
37. Row 9 / Column 8 → 4 (Naked Single)
38. Row 3 / Column 6 → 2 (Naked Single)
39. Row 3 / Column 5 → 4 (Full House)
40. Row 8 / Column 6 → 5 (Full House)
41. Row 7 / Column 5 → 9 (Naked Single)
42. Row 7 / Column 2 → 1 (Full House)
43. Row 8 / Column 5 → 2 (Full House)
44. Row 5 / Column 8 → 1 (Naked Single)
45. Row 9 / Column 9 → 9 (Naked Single)
46. Row 8 / Column 7 → 1 (Full House)
47. Row 8 / Column 1 → 7 (Naked Single)
48. Row 8 / Column 2 → 9 (Full House)
49. Row 5 / Column 3 → 2 (Naked Single)
50. Row 5 / Column 1 → 4 (Full House)
51. Row 6 / Column 9 → 5 (Naked Single)
52. Row 6 / Column 7 → 4 (Full House)
53. Row 1 / Column 9 → 4 (Naked Single)
54. Row 3 / Column 9 → 1 (Full House)
55. Row 9 / Column 2 → 2 (Naked Single)
56. Row 9 / Column 1 → 5 (Full House)
57. Row 3 / Column 7 → 5 (Naked Single)
58. Row 1 / Column 7 → 9 (Full House)
59. Row 2 / Column 3 → 9 (Naked Single)
60. Row 6 / Column 3 → 1 (Full House)
61. Row 6 / Column 1 → 9 (Full House)
62. Row 2 / Column 1 → 2 (Full House)
63. Row 2 / Column 8 → 7 (Full House)
64. Row 1 / Column 2 → 6 (Naked Single)
65. Row 1 / Column 8 → 2 (Full House)
66. Row 3 / Column 8 → 6 (Full House)
67. Row 3 / Column 2 → 7 (Full House)