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

This Sudoku Puzzle has 64 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Naked Pair, Bivalue Universal Grave + 1 techniques.

Try To Solve This Puzzle

Solution Steps:

1. Row 1 / Column 3 → 3 (Hidden Single)
2. Row 5 / Column 3 → 5 (Hidden Single)
3. Row 2 / Column 6 → 5 (Hidden Single)
4. Row 1 / Column 1 → 4 (Hidden Single)
5. Row 1 / Column 7 → 5 (Hidden Single)
6. Row 4 / Column 3 → 4 (Hidden Single)
7. Row 3 / Column 2 → 5 (Hidden Single)
8. Row 7 / Column 8 → 5 (Hidden Single)
9. Row 4 / Column 2 → 1 (Hidden Single)
10. Row 9 / Column 3 → 2 (Hidden Single)
11. Row 3 / Column 1 → 7 (Hidden Single)
12. Row 9 / Column 1 → 6 (Naked Single)
13. Row 7 / Column 1 → 9 (Naked Single)
14. Row 7 / Column 3 → 1 (Naked Single)
15. Row 2 / Column 2 → 8 (Hidden Single)
16. Row 6 / Column 2 → 6 (Naked Single)
17. Row 6 / Column 8 → 2 (Naked Single)
18. Row 2 / Column 8 → 6 (Naked Single)
19. Row 1 / Column 9 → 9 (Naked Single)
20. Row 1 / Column 5 → 6 (Full House)
21. Row 2 / Column 3 → 9 (Naked Single)
22. Row 2 / Column 4 → 2 (Full House)
23. Row 3 / Column 3 → 6 (Full House)
24. Row 8 / Column 4 → 1 (Hidden Single)
25. Row 4 / Column 7 → 9 (Hidden Single)
26. Row 5 / Column 5 → 2 (Hidden Single)
27. Row 5 / Column 1 → 8 (Naked Single)
28. Row 4 / Column 1 → 2 (Full House)
29. Row 5 / Column 8 → 1 (Hidden Single)
30. Row 4 / Column 9 → 8 (Hidden Single)
31. Locked Candidates Type 1 (Pointing): 3 in b5 => r7c4<>3
32. Locked Candidates Type 1 (Pointing): 7 in b5 => r89c6<>7
33. Row 9 / Column 6 → 8 (Naked Single)
34. Row 6 / Column 6 → 9 (Naked Single)
35. Row 6 / Column 4 → 8 (Full House)
36. Row 3 / Column 4 → 9 (Naked Single)
37. Row 3 / Column 5 → 8 (Full House)
38. Row 7 / Column 7 → 8 (Hidden Single)
39. Row 8 / Column 5 → 9 (Hidden Single)
40. Locked Candidates Type 1 (Pointing): 6 in b6 => r5c46<>6
41. Naked Pair: 3,7 in r7c25 => r7c9<>3
42. Naked Pair: 3,7 in r8c28 => r8c7<>7, r8c9<>3
43. Bivalue Universal Grave + 1 => r8c9<>2, r8c9<>4
44. Row 8 / Column 9 → 6 (Naked Single)
45. Row 5 / Column 9 → 3 (Naked Single)
46. Row 7 / Column 9 → 4 (Naked Single)
47. Row 8 / Column 6 → 4 (Naked Single)
48. Row 8 / Column 7 → 2 (Naked Single)
49. Row 4 / Column 8 → 7 (Naked Single)
50. Row 5 / Column 7 → 6 (Full House)
51. Row 8 / Column 8 → 3 (Full House)
52. Row 8 / Column 2 → 7 (Full House)
53. Row 7 / Column 2 → 3 (Full House)
54. Row 5 / Column 4 → 4 (Naked Single)
55. Row 5 / Column 6 → 7 (Full House)
56. Row 4 / Column 6 → 6 (Full House)
57. Row 4 / Column 4 → 3 (Full House)
58. Row 7 / Column 4 → 6 (Full House)
59. Row 7 / Column 5 → 7 (Full House)
60. Row 9 / Column 5 → 3 (Full House)
61. Row 9 / Column 9 → 1 (Naked Single)
62. Row 3 / Column 9 → 2 (Full House)
63. Row 3 / Column 7 → 1 (Full House)
64. Row 9 / Column 7 → 7 (Full House)