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

This Sudoku Puzzle has 50 steps and it is solved using Naked Single, Locked Candidates Type 1 (Pointing), Naked Triple, Hidden Single, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 5 → 1 (Naked Single)
2. Locked Candidates Type 1 (Pointing): 1 in b2 => r789c6<>1
3. Locked Candidates Type 1 (Pointing): 8 in b5 => r5c1<>8
4. Locked Candidates Type 1 (Pointing): 2 in b9 => r7c1246<>2
5. Locked Candidates Type 1 (Pointing): 2 in b7 => r9c46<>2
6. Naked Triple: 1,3,5 in r7c2,r89c3 => r7c1<>3, r79c1,r9c2<>5, r9c2<>1
7. Row 7 / Column 1 → 7 (Naked Single)
8. Row 1 / Column 8 → 7 (Hidden Single)
9. Row 8 / Column 9 → 7 (Hidden Single)
10. Locked Candidates Type 1 (Pointing): 1 in b9 => r7c24<>1
11. Row 4 / Column 2 → 1 (Hidden Single)
12. Row 4 / Column 3 → 8 (Naked Single)
13. Row 4 / Column 1 → 9 (Full House)
14. Row 9 / Column 1 → 2 (Naked Single)
15. Row 9 / Column 2 → 9 (Naked Single)
16. Row 3 / Column 1 → 8 (Hidden Single)
17. Locked Candidates Type 1 (Pointing): 5 in b9 => r7c26<>5
18. Row 7 / Column 2 → 3 (Naked Single)
19. Row 5 / Column 2 → 5 (Naked Single)
20. Row 5 / Column 1 → 3 (Full House)
21. Row 2 / Column 1 → 5 (Full House)
22. Row 2 / Column 5 → 3 (Naked Single)
23. Row 8 / Column 5 → 5 (Full House)
24. Row 3 / Column 3 → 3 (Naked Single)
25. Row 8 / Column 3 → 1 (Naked Single)
26. Row 9 / Column 3 → 5 (Full House)
27. Row 9 / Column 6 → 7 (Naked Single)
28. Row 9 / Column 4 → 1 (Full House)
29. Row 8 / Column 4 → 2 (Naked Single)
30. Row 8 / Column 6 → 3 (Full House)
31. Row 5 / Column 6 → 8 (Naked Single)
32. Row 5 / Column 4 → 7 (Full House)
33. Row 1 / Column 4 → 4 (Naked Single)
34. Row 7 / Column 4 → 8 (Full House)
35. Row 7 / Column 6 → 4 (Full House)
36. Row 1 / Column 9 → 3 (Hidden Single)
37. Row 6 / Column 9 → 1 (Naked Single)
38. Row 6 / Column 8 → 3 (Full House)
39. Row 7 / Column 9 → 5 (Naked Single)
40. Row 3 / Column 9 → 4 (Full House)
41. Row 3 / Column 2 → 2 (Naked Single)
42. Row 2 / Column 2 → 4 (Full House)
43. Row 3 / Column 8 → 1 (Naked Single)
44. Row 3 / Column 6 → 5 (Full House)
45. Row 7 / Column 8 → 2 (Full House)
46. Row 7 / Column 7 → 1 (Full House)
47. Row 2 / Column 7 → 2 (Naked Single)
48. Row 1 / Column 7 → 5 (Full House)
49. Row 1 / Column 6 → 2 (Full House)
50. Row 2 / Column 6 → 1 (Full House)