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

This Sudoku Puzzle has 64 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Hidden Triple techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 3 / Column 9 → 4 (Hidden Single)
2. Row 3 / Column 5 → 7 (Hidden Single)
3. Row 5 / Column 5 → 8 (Hidden Single)
4. Row 4 / Column 8 → 7 (Hidden Single)
5. Row 5 / Column 2 → 7 (Hidden Single)
6. Row 2 / Column 8 → 8 (Hidden Single)
7. Row 9 / Column 2 → 8 (Hidden Single)
8. Row 3 / Column 3 → 8 (Hidden Single)
9. Row 1 / Column 2 → 6 (Hidden Single)
10. Row 2 / Column 4 → 6 (Hidden Single)
11. Row 8 / Column 9 → 6 (Hidden Single)
12. Row 7 / Column 4 → 7 (Hidden Single)
13. Row 9 / Column 8 → 2 (Hidden Single)
14. Row 2 / Column 7 → 9 (Hidden Single)
15. Row 8 / Column 2 → 4 (Hidden Single)
16. Row 7 / Column 7 → 4 (Hidden Single)
17. Row 9 / Column 7 → 3 (Naked Single)
18. Row 9 / Column 1 → 9 (Naked Single)
19. Row 9 / Column 4 → 4 (Full House)
20. Row 3 / Column 2 → 9 (Hidden Single)
21. Locked Candidates Type 1 (Pointing): 1 in b2 => r5c6<>1
22. Locked Candidates Type 1 (Pointing): 5 in b2 => r458c6<>5
23. Locked Candidates Type 1 (Pointing): 3 in b3 => r1c3<>3
24. Locked Candidates Type 1 (Pointing): 5 in b3 => r1c6<>5
25. Locked Candidates Type 1 (Pointing): 9 in b8 => r8c8<>9
26. Locked Candidates Type 1 (Pointing): 1 in b9 => r5c8<>1
27. Locked Candidates Type 2 (Claiming): 5 in c7 => r5c89,r6c9<>5
28. Naked Triple: 3,5,6 in r4c157 => r4c36<>3
29. Hidden Triple: 1,5,6 in r5c147 => r5c1<>2, r5c1<>3, r5c4<>9
30. Row 2 / Column 1 → 2 (Hidden Single)
31. Row 1 / Column 3 → 1 (Naked Single)
32. Row 2 / Column 6 → 5 (Naked Single)
33. Row 2 / Column 2 → 3 (Full House)
34. Row 3 / Column 1 → 5 (Full House)
35. Row 3 / Column 6 → 1 (Full House)
36. Row 1 / Column 6 → 2 (Full House)
37. Row 6 / Column 2 → 5 (Full House)
38. Row 8 / Column 3 → 3 (Naked Single)
39. Row 7 / Column 1 → 1 (Full House)
40. Row 5 / Column 1 → 6 (Naked Single)
41. Row 4 / Column 1 → 3 (Full House)
42. Row 8 / Column 6 → 9 (Naked Single)
43. Row 4 / Column 6 → 4 (Naked Single)
44. Row 5 / Column 6 → 3 (Full House)
45. Row 8 / Column 4 → 5 (Naked Single)
46. Row 7 / Column 5 → 3 (Full House)
47. Row 8 / Column 8 → 1 (Full House)
48. Row 4 / Column 3 → 9 (Naked Single)
49. Row 5 / Column 8 → 9 (Naked Single)
50. Row 6 / Column 5 → 6 (Naked Single)
51. Row 4 / Column 5 → 5 (Full House)
52. Row 4 / Column 7 → 6 (Full House)
53. Row 5 / Column 4 → 1 (Naked Single)
54. Row 6 / Column 4 → 9 (Full House)
55. Row 6 / Column 3 → 2 (Naked Single)
56. Row 5 / Column 3 → 4 (Full House)
57. Row 5 / Column 9 → 2 (Naked Single)
58. Row 5 / Column 7 → 5 (Full House)
59. Row 6 / Column 7 → 1 (Full House)
60. Row 6 / Column 9 → 3 (Full House)
61. Row 7 / Column 8 → 5 (Naked Single)
62. Row 1 / Column 8 → 3 (Full House)
63. Row 1 / Column 9 → 5 (Full House)
64. Row 7 / Column 9 → 9 (Full House)