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

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

Try To Solve This Puzzle

## Solution Steps:

1. Row 3 / Column 2 → 3 (Hidden Single)
2. Row 1 / Column 8 → 4 (Hidden Single)
3. Row 8 / Column 6 → 8 (Hidden Single)
4. Row 9 / Column 7 → 7 (Hidden Single)
5. Row 7 / Column 5 → 3 (Hidden Single)
6. Row 8 / Column 5 → 5 (Naked Single)
7. Row 9 / Column 5 → 4 (Naked Single)
8. Row 3 / Column 3 → 8 (Hidden Single)
9. Row 4 / Column 4 → 3 (Hidden Single)
10. Row 7 / Column 2 → 8 (Hidden Single)
11. Row 4 / Column 1 → 8 (Hidden Single)
12. Row 6 / Column 4 → 8 (Hidden Single)
13. Row 7 / Column 3 → 4 (Hidden Single)
14. Row 5 / Column 1 → 4 (Hidden Single)
15. Row 6 / Column 6 → 5 (Hidden Single)
16. Row 2 / Column 2 → 4 (Hidden Single)
17. Row 4 / Column 6 → 4 (Hidden Single)
18. Row 3 / Column 4 → 4 (Hidden Single)
19. Locked Candidates Type 1 (Pointing): 1 in b3 => r45c9<>1
20. Locked Candidates Type 1 (Pointing): 6 in b3 => r45c9<>6
21. Locked Candidates Type 1 (Pointing): 9 in b5 => r5c279<>9
22. Locked Candidates Type 1 (Pointing): 9 in b6 => r4c3<>9
23. Locked Candidates Type 1 (Pointing): 2 in b8 => r9c238<>2
24. Locked Candidates Type 1 (Pointing): 2 in b7 => r8c8<>2
25. Row 4 / Column 8 → 2 (Hidden Single)
26. Row 8 / Column 3 → 2 (Hidden Single)
27. Row 5 / Column 2 → 2 (Hidden Single)
28. Row 6 / Column 8 → 6 (Hidden Single)
29. Row 6 / Column 1 → 9 (Naked Single)
30. Row 8 / Column 1 → 3 (Naked Single)
31. Row 8 / Column 8 → 1 (Naked Single)
32. Row 8 / Column 2 → 9 (Full House)
33. Row 9 / Column 8 → 3 (Full House)
34. Row 4 / Column 3 → 6 (Hidden Single)
35. Row 1 / Column 3 → 9 (Hidden Single)
36. Locked Candidates Type 1 (Pointing): 6 in b1 => r1c59<>6
37. Row 5 / Column 5 → 6 (Hidden Single)
38. Locked Candidates Type 2 (Claiming): 5 in r3 => r12c9<>5
39. XY-Wing: 1/5/7 in r1c5,r2c34 => r1c2,r2c6<>7
40. Row 1 / Column 2 → 6 (Naked Single)
41. Row 2 / Column 6 → 6 (Naked Single)
42. Row 1 / Column 1 → 5 (Naked Single)
43. Row 2 / Column 3 → 7 (Full House)
44. Row 9 / Column 1 → 6 (Full House)
45. Row 9 / Column 2 → 1 (Naked Single)
46. Row 6 / Column 2 → 7 (Full House)
47. Row 6 / Column 3 → 1 (Full House)
48. Row 9 / Column 3 → 5 (Full House)
49. Row 2 / Column 9 → 1 (Naked Single)
50. Row 2 / Column 4 → 5 (Full House)
51. Row 3 / Column 6 → 2 (Naked Single)
52. Row 1 / Column 9 → 2 (Naked Single)
53. Row 1 / Column 4 → 1 (Naked Single)
54. Row 1 / Column 5 → 7 (Full House)
55. Row 4 / Column 5 → 1 (Full House)
56. Row 3 / Column 7 → 5 (Naked Single)
57. Row 3 / Column 9 → 6 (Full House)
58. Row 9 / Column 6 → 9 (Naked Single)
59. Row 5 / Column 6 → 7 (Full House)
60. Row 5 / Column 4 → 9 (Full House)
61. Row 9 / Column 4 → 2 (Full House)
62. Row 7 / Column 9 → 9 (Naked Single)
63. Row 7 / Column 7 → 2 (Full House)
64. Row 4 / Column 7 → 9 (Naked Single)
65. Row 5 / Column 7 → 1 (Full House)
66. Row 5 / Column 9 → 5 (Full House)
67. Row 4 / Column 9 → 7 (Full House)