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

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

Try To Solve This Puzzle

## Solution Steps:

1. Row 2 / Column 2 → 6 (Naked Single)
2. Row 3 / Column 3 → 1 (Hidden Single)
3. Row 5 / Column 1 → 6 (Hidden Single)
4. Row 1 / Column 5 → 6 (Hidden Single)
5. Row 1 / Column 3 → 3 (Hidden Single)
6. Row 7 / Column 3 → 5 (Hidden Single)
7. Locked Candidates Type 1 (Pointing): 4 in b2 => r3c1<>4
8. Locked Candidates Type 1 (Pointing): 7 in b4 => r9c2<>7
9. Locked Candidates Type 1 (Pointing): 9 in b4 => r9c3<>9
10. Locked Candidates Type 1 (Pointing): 2 in b6 => r79c7<>2
11. Locked Candidates Type 2 (Claiming): 7 in r5 => r4c78,r6c78<>7
12. X-Wing: 3 r28 c68 => r3c6,r9c8<>3
13. Row 3 / Column 6 → 4 (Naked Single)
14. Naked Triple: 1,6,8 in r467c6 => r8c6<>1, r8c6<>8
15. 2-String Kite: 5 in r2c8,r6c5 (connected by r2c4,r3c5) => r6c8<>5
16. Sue de Coq: r5c789 - {14789} (r5c5 - {14}, r4c78,r6c7 - {2589}) => r6c8<>8
17. XY-Chain: 5 5- r2c4 -9- r2c6 -3- r8c6 -9- r8c1 -8- r3c1 -5 => r3c45<>5
18. Row 3 / Column 4 → 2 (Naked Single)
19. Row 3 / Column 5 → 3 (Naked Single)
20. Row 2 / Column 6 → 9 (Naked Single)
21. Row 2 / Column 4 → 5 (Full House)
22. Row 2 / Column 8 → 3 (Full House)
23. Row 8 / Column 6 → 3 (Naked Single)
24. Row 6 / Column 5 → 5 (Hidden Single)
25. Row 9 / Column 7 → 3 (Hidden Single)
26. Row 9 / Column 4 → 6 (Hidden Single)
27. Row 7 / Column 7 → 6 (Hidden Single)
28. Row 4 / Column 6 → 6 (Hidden Single)
29. Row 9 / Column 1 → 9 (Hidden Single)
30. Row 8 / Column 1 → 8 (Naked Single)
31. Row 3 / Column 1 → 5 (Naked Single)
32. Row 8 / Column 4 → 9 (Naked Single)
33. Row 9 / Column 3 → 2 (Naked Single)
34. Row 1 / Column 1 → 4 (Naked Single)
35. Row 1 / Column 2 → 8 (Full House)
36. Row 7 / Column 1 → 7 (Full House)
37. Row 8 / Column 2 → 1 (Naked Single)
38. Row 9 / Column 2 → 4 (Full House)
39. Row 8 / Column 8 → 5 (Naked Single)
40. Row 8 / Column 9 → 2 (Full House)
41. Row 9 / Column 5 → 1 (Naked Single)
42. Row 4 / Column 8 → 8 (Naked Single)
43. Row 5 / Column 5 → 4 (Naked Single)
44. Row 7 / Column 5 → 2 (Full House)
45. Row 7 / Column 6 → 8 (Naked Single)
46. Row 6 / Column 6 → 1 (Full House)
47. Row 7 / Column 4 → 4 (Full House)
48. Row 7 / Column 9 → 1 (Full House)
49. Row 4 / Column 4 → 7 (Naked Single)
50. Row 6 / Column 4 → 8 (Full House)
51. Row 9 / Column 8 → 7 (Naked Single)
52. Row 9 / Column 9 → 8 (Full House)
53. Row 6 / Column 8 → 4 (Naked Single)
54. Row 5 / Column 8 → 1 (Full House)
55. Row 4 / Column 2 → 2 (Naked Single)
56. Row 4 / Column 7 → 5 (Full House)
57. Row 6 / Column 2 → 7 (Full House)
58. Row 6 / Column 3 → 9 (Naked Single)
59. Row 5 / Column 3 → 8 (Full House)
60. Row 6 / Column 7 → 2 (Full House)
61. Row 3 / Column 9 → 7 (Naked Single)
62. Row 3 / Column 7 → 8 (Full House)
63. Row 1 / Column 7 → 9 (Naked Single)
64. Row 1 / Column 9 → 5 (Full House)
65. Row 5 / Column 9 → 9 (Full House)
66. Row 5 / Column 7 → 7 (Full House)