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

This Sudoku Puzzle has 49 steps and it is solved using Naked Single, Full House, Hidden Single, Bivalue Universal Grave + 1 techniques.

Try To Solve This Puzzle

Solution Steps:

1. Row 1 / Column 2 → 3 (Naked Single)
2. Row 6 / Column 2 → 7 (Naked Single)
3. Row 2 / Column 3 → 6 (Naked Single)
4. Row 7 / Column 2 → 8 (Naked Single)
5. Row 2 / Column 1 → 8 (Naked Single)
6. Row 3 / Column 3 → 2 (Full House)
7. Row 6 / Column 3 → 9 (Naked Single)
8. Row 7 / Column 1 → 9 (Naked Single)
9. Row 5 / Column 1 → 6 (Full House)
10. Row 9 / Column 2 → 1 (Naked Single)
11. Row 4 / Column 2 → 4 (Full House)
12. Row 4 / Column 3 → 1 (Full House)
13. Row 5 / Column 5 → 3 (Naked Single)
14. Row 5 / Column 6 → 9 (Naked Single)
15. Row 4 / Column 4 → 6 (Naked Single)
16. Row 6 / Column 5 → 2 (Full House)
17. Row 5 / Column 8 → 5 (Naked Single)
18. Row 5 / Column 7 → 1 (Full House)
19. Row 4 / Column 7 → 2 (Naked Single)
20. Row 4 / Column 8 → 9 (Full House)
21. Row 1 / Column 8 → 6 (Naked Single)
22. Row 1 / Column 5 → 5 (Naked Single)
23. Row 1 / Column 9 → 9 (Full House)
24. Row 6 / Column 8 → 3 (Naked Single)
25. Row 6 / Column 7 → 6 (Full House)
26. Row 7 / Column 5 → 6 (Naked Single)
27. Row 3 / Column 8 → 4 (Naked Single)
28. Row 8 / Column 8 → 8 (Full House)
29. Row 7 / Column 6 → 3 (Naked Single)
30. Row 8 / Column 5 → 1 (Naked Single)
31. Row 2 / Column 6 → 4 (Naked Single)
32. Row 7 / Column 3 → 5 (Naked Single)
33. Row 7 / Column 9 → 2 (Full House)
34. Row 9 / Column 3 → 3 (Full House)
35. Row 9 / Column 4 → 5 (Naked Single)
36. Row 3 / Column 5 → 8 (Naked Single)
37. Row 9 / Column 5 → 4 (Full House)
38. Row 9 / Column 6 → 8 (Full House)
39. Row 8 / Column 4 → 9 (Full House)
40. Row 3 / Column 6 → 6 (Full House)
41. Row 2 / Column 7 → 7 (Hidden Single)
42. Bivalue Universal Grave + 1 => r3c9<>1, r3c9<>5
43. Row 3 / Column 9 → 3 (Naked Single)
44. Row 2 / Column 9 → 1 (Naked Single)
45. Row 3 / Column 7 → 5 (Full House)
46. Row 3 / Column 4 → 1 (Full House)
47. Row 8 / Column 9 → 5 (Full House)
48. Row 2 / Column 4 → 3 (Full House)
49. Row 8 / Column 7 → 3 (Full House)