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

This Sudoku Puzzle has 66 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Full House, undefined, Finned Swordfish, Locked Candidates Type 2 (Claiming), Naked Triple techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 4 / Column 3 → 2 (Naked Single)
2. Row 2 / Column 3 → 3 (Hidden Single)
3. Row 6 / Column 3 → 5 (Hidden Single)
4. Row 2 / Column 1 → 2 (Hidden Single)
5. Row 5 / Column 4 → 2 (Hidden Single)
6. Row 6 / Column 1 → 9 (Hidden Single)
7. Row 2 / Column 9 → 9 (Hidden Single)
8. Row 6 / Column 9 → 2 (Hidden Single)
9. Row 4 / Column 1 → 7 (Hidden Single)
10. Row 8 / Column 1 → 8 (Hidden Single)
11. Locked Candidates Type 1 (Pointing): 9 in b1 => r78c2<>9
12. Row 8 / Column 2 → 1 (Naked Single)
13. Row 8 / Column 3 → 9 (Hidden Single)
14. Row 7 / Column 3 → 4 (Full House)
15. Locked Candidates Type 1 (Pointing): 6 in b4 => r13c2<>6
16. X-Wing: 7 r26 c57 => r19c5,r5c7<>7
17. Finned Swordfish: 6 r267 c578 fr7c4 fr7c6 => r8c5<>6
18. Row 8 / Column 5 → 4 (Naked Single)
19. Row 9 / Column 8 → 4 (Hidden Single)
20. Row 9 / Column 2 → 2 (Hidden Single)
21. Row 7 / Column 2 → 7 (Full House)
22. Row 7 / Column 8 → 2 (Hidden Single)
23. Row 7 / Column 7 → 1 (Hidden Single)
24. XYZ-Wing: 6/7/8 in r2c78,r6c7 => r3c7<>6
25. XYZ-Wing: 1/3/6 in r14c5,r4c4 => r6c5<>6
26. Locked Candidates Type 2 (Claiming): 6 in r6 => r4c79,r5c789<>6
27. XY-Wing: 6/7/5 in r5c9,r68c7 => r5c7,r8c9<>5
28. Row 8 / Column 9 → 6 (Naked Single)
29. Row 8 / Column 7 → 5 (Full House)
30. Naked Triple: 3,4,8 in r345c7 => r2c7<>8
31. XY-Wing: 1/8/7 in r69c5,r9c6 => r5c6<>7
32. Row 5 / Column 9 → 7 (Hidden Single)
33. Row 6 / Column 7 → 6 (Naked Single)
34. Row 2 / Column 7 → 7 (Naked Single)
35. Row 6 / Column 8 → 1 (Naked Single)
36. Row 6 / Column 5 → 7 (Full House)
37. Row 4 / Column 9 → 4 (Naked Single)
38. Row 5 / Column 8 → 5 (Hidden Single)
39. Row 1 / Column 4 → 4 (Hidden Single)
40. Row 3 / Column 7 → 4 (Hidden Single)
41. Row 1 / Column 6 → 7 (Hidden Single)
42. Row 9 / Column 6 → 8 (Naked Single)
43. Row 9 / Column 5 → 1 (Naked Single)
44. Row 9 / Column 4 → 7 (Full House)
45. Row 1 / Column 2 → 9 (Hidden Single)
46. Row 3 / Column 2 → 5 (Naked Single)
47. Row 3 / Column 9 → 1 (Naked Single)
48. Row 1 / Column 9 → 5 (Full House)
49. Row 3 / Column 1 → 6 (Naked Single)
50. Row 1 / Column 1 → 1 (Full House)
51. Row 3 / Column 4 → 9 (Naked Single)
52. Row 3 / Column 6 → 3 (Naked Single)
53. Row 3 / Column 8 → 8 (Full House)
54. Row 7 / Column 4 → 6 (Naked Single)
55. Row 4 / Column 4 → 1 (Full House)
56. Row 7 / Column 6 → 9 (Full House)
57. Row 5 / Column 6 → 6 (Full House)
58. Row 4 / Column 5 → 3 (Full House)
59. Row 1 / Column 5 → 6 (Naked Single)
60. Row 1 / Column 8 → 3 (Full House)
61. Row 2 / Column 8 → 6 (Full House)
62. Row 2 / Column 5 → 8 (Full House)
63. Row 5 / Column 2 → 8 (Naked Single)
64. Row 4 / Column 2 → 6 (Full House)
65. Row 4 / Column 7 → 8 (Full House)
66. Row 5 / Column 7 → 3 (Full House)