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

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

Try To Solve This Puzzle

## Solution Steps:

1. Row 6 / Column 3 → 8 (Hidden Single)
2. Row 4 / Column 2 → 3 (Hidden Single)
3. Row 7 / Column 5 → 3 (Hidden Single)
4. Row 6 / Column 8 → 5 (Hidden Single)
5. Row 7 / Column 1 → 4 (Hidden Single)
6. Row 8 / Column 9 → 5 (Hidden Single)
7. Row 4 / Column 8 → 4 (Hidden Single)
8. Row 8 / Column 8 → 2 (Hidden Single)
9. Row 8 / Column 1 → 6 (Naked Single)
10. Row 8 / Column 2 → 7 (Naked Single)
11. Row 8 / Column 4 → 1 (Naked Single)
12. Row 8 / Column 6 → 8 (Full House)
13. Row 4 / Column 6 → 7 (Hidden Single)
14. Row 9 / Column 7 → 8 (Hidden Single)
15. Row 2 / Column 8 → 7 (Hidden Single)
16. Row 7 / Column 8 → 6 (Naked Single)
17. Row 1 / Column 8 → 8 (Full House)
18. Row 3 / Column 3 → 7 (Hidden Single)
19. Row 2 / Column 6 → 1 (Hidden Single)
20. Row 9 / Column 5 → 7 (Hidden Single)
21. Locked Candidates Type 1 (Pointing): 9 in b5 => r6c2<>9
22. Locked Candidates Type 2 (Claiming): 9 in c2 => r1c13,r2c1<>9
23. Locked Candidates Type 2 (Claiming): 4 in c5 => r13c6,r3c4<>4
24. Naked Pair: 2,6 in r4c3,r6c2 => r5c13<>2, r5c3<>6
25. Naked Pair: 2,6 in r4c4,r5c5 => r6c4<>2, r6c46<>6
26. 2-String Kite: 6 in r1c3,r6c7 (connected by r4c3,r6c2) => r1c7<>6
27. Turbot Fish: 6 r1c3 =6= r4c3 -6- r4c4 =6= r5c5 => r1c5<>6
28. Sue de Coq: r2c45 - {3689} (r2c1 - {38}, r13c6 - {569}) => r3c45<>6
29. XY-Chain: 2 2- r3c4 -3- r3c7 -6- r6c7 -2- r6c2 -6- r4c3 -2- r4c4 -6- r5c5 -2 => r13c5,r4c4<>2
30. Row 1 / Column 5 → 4 (Naked Single)
31. Row 4 / Column 4 → 6 (Naked Single)
32. Row 4 / Column 3 → 2 (Full House)
33. Row 3 / Column 5 → 8 (Naked Single)
34. Row 5 / Column 5 → 2 (Naked Single)
35. Row 2 / Column 5 → 6 (Full House)
36. Row 9 / Column 4 → 4 (Naked Single)
37. Row 9 / Column 6 → 6 (Full House)
38. Row 6 / Column 2 → 6 (Naked Single)
39. Row 2 / Column 2 → 9 (Naked Single)
40. Row 1 / Column 2 → 2 (Full House)
41. Row 3 / Column 6 → 5 (Naked Single)
42. Row 6 / Column 4 → 9 (Naked Single)
43. Row 6 / Column 6 → 4 (Full House)
44. Row 6 / Column 7 → 2 (Full House)
45. Row 1 / Column 6 → 9 (Full House)
46. Row 2 / Column 4 → 3 (Naked Single)
47. Row 2 / Column 1 → 8 (Full House)
48. Row 3 / Column 4 → 2 (Full House)
49. Row 3 / Column 1 → 3 (Naked Single)
50. Row 1 / Column 1 → 5 (Naked Single)
51. Row 1 / Column 3 → 6 (Full House)
52. Row 3 / Column 7 → 6 (Naked Single)
53. Row 3 / Column 9 → 4 (Full House)
54. Row 5 / Column 1 → 9 (Naked Single)
55. Row 5 / Column 3 → 5 (Full House)
56. Row 9 / Column 1 → 2 (Full House)
57. Row 1 / Column 9 → 1 (Naked Single)
58. Row 1 / Column 7 → 3 (Full House)
59. Row 5 / Column 7 → 7 (Naked Single)
60. Row 5 / Column 9 → 6 (Full House)
61. Row 7 / Column 7 → 1 (Full House)
62. Row 9 / Column 9 → 9 (Naked Single)
63. Row 7 / Column 9 → 7 (Full House)
64. Row 7 / Column 3 → 9 (Full House)
65. Row 9 / Column 3 → 1 (Full House)