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

This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, undefined, Naked Single, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 1 / Column 1 → 4 (Hidden Single)
2. Row 2 / Column 8 → 1 (Hidden Single)
3. Row 5 / Column 3 → 8 (Hidden Single)
4. Row 1 / Column 5 → 8 (Hidden Single)
5. Row 9 / Column 2 → 8 (Hidden Single)
6. Row 2 / Column 6 → 5 (Hidden Single)
7. Row 4 / Column 6 → 1 (Hidden Single)
8. Row 7 / Column 4 → 1 (Hidden Single)
9. Row 9 / Column 9 → 1 (Hidden Single)
10. Row 2 / Column 7 → 8 (Hidden Single)
11. Row 5 / Column 8 → 4 (Hidden Single)
12. Row 1 / Column 4 → 7 (Hidden Single)
13. Row 8 / Column 8 → 8 (Hidden Single)
14. Row 4 / Column 2 → 4 (Hidden Single)
15. Row 5 / Column 1 → 1 (Hidden Single)
16. Row 8 / Column 4 → 4 (Hidden Single)
17. Row 7 / Column 3 → 4 (Hidden Single)
18. Row 9 / Column 7 → 4 (Hidden Single)
19. Row 6 / Column 4 → 2 (Hidden Single)
20. Locked Pair: 6,7 in r9c13 => r8c13,r9c5<>6, r8c13,r9c58<>7
21. Locked Candidates Type 1 (Pointing): 6 in b4 => r6c5<>6
22. Locked Candidates Type 1 (Pointing): 5 in b7 => r8c79<>5
23. Locked Candidates Type 2 (Claiming): 3 in r1 => r3c8<>3
24. Naked Pair: 6,9 in r1c67 => r1c89<>9, r1c9<>6
25. Locked Candidates Type 1 (Pointing): 6 in b3 => r8c7<>6
26. W-Wing: 9/5 in r3c8,r5c9 connected by 5 in r7c89 => r6c8<>9
27. XY-Wing: 5/7/9 in r37c8,r8c7 => r13c7,r9c8<>9
28. Row 1 / Column 7 → 6 (Naked Single)
29. Row 9 / Column 8 → 2 (Naked Single)
30. Row 1 / Column 6 → 9 (Naked Single)
31. Row 8 / Column 6 → 6 (Full House)
32. Row 3 / Column 7 → 5 (Naked Single)
33. Row 1 / Column 8 → 3 (Naked Single)
34. Row 1 / Column 9 → 2 (Full House)
35. Row 3 / Column 8 → 9 (Full House)
36. Row 9 / Column 5 → 9 (Naked Single)
37. Row 2 / Column 4 → 3 (Naked Single)
38. Row 3 / Column 4 → 6 (Full House)
39. Row 5 / Column 4 → 9 (Full House)
40. Row 7 / Column 5 → 7 (Naked Single)
41. Row 8 / Column 5 → 2 (Full House)
42. Row 8 / Column 9 → 9 (Naked Single)
43. Row 3 / Column 2 → 7 (Naked Single)
44. Row 3 / Column 3 → 3 (Full House)
45. Row 6 / Column 2 → 9 (Full House)
46. Row 2 / Column 1 → 2 (Naked Single)
47. Row 2 / Column 3 → 9 (Full House)
48. Row 5 / Column 9 → 5 (Naked Single)
49. Row 5 / Column 5 → 6 (Full House)
50. Row 7 / Column 8 → 5 (Naked Single)
51. Row 6 / Column 8 → 7 (Full House)
52. Row 7 / Column 9 → 6 (Full House)
53. Row 8 / Column 7 → 7 (Full House)
54. Row 4 / Column 9 → 3 (Full House)
55. Row 4 / Column 7 → 9 (Full House)
56. Row 8 / Column 3 → 5 (Naked Single)
57. Row 8 / Column 1 → 3 (Full House)
58. Row 4 / Column 5 → 5 (Naked Single)
59. Row 6 / Column 5 → 3 (Full House)
60. Row 6 / Column 3 → 6 (Naked Single)
61. Row 6 / Column 1 → 5 (Full House)
62. Row 4 / Column 1 → 7 (Naked Single)
63. Row 4 / Column 3 → 2 (Full House)
64. Row 9 / Column 3 → 7 (Full House)
65. Row 9 / Column 1 → 6 (Full House)