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

This Sudoku Puzzle has 52 steps and it is solved using Locked Candidates Type 1 (Pointing), Locked Triple, Naked Single, Hidden Single, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Locked Candidates Type 1 (Pointing): 3 in b6 => r123c9<>3
2. Locked Triple: 6,7,8 in r123c9 => r13c7,r8c9<>6, r123c7,r8c9<>8
3. Row 8 / Column 9 → 5 (Naked Single)
4. Row 8 / Column 2 → 9 (Naked Single)
5. Row 4 / Column 7 → 5 (Hidden Single)
6. Row 4 / Column 1 → 2 (Naked Single)
7. Row 1 / Column 7 → 9 (Hidden Single)
8. Row 2 / Column 7 → 3 (Naked Single)
9. Row 3 / Column 7 → 1 (Naked Single)
10. Row 2 / Column 1 → 9 (Hidden Single)
11. Row 9 / Column 5 → 9 (Hidden Single)
12. Row 3 / Column 2 → 2 (Hidden Single)
13. Row 6 / Column 9 → 2 (Hidden Single)
14. Row 5 / Column 9 → 3 (Full House)
15. Row 1 / Column 4 → 3 (Hidden Single)
16. Row 1 / Column 2 → 5 (Naked Single)
17. Row 6 / Column 2 → 3 (Full House)
18. Row 2 / Column 3 → 8 (Naked Single)
19. Row 1 / Column 3 → 6 (Naked Single)
20. Row 3 / Column 3 → 3 (Full House)
21. Row 2 / Column 9 → 7 (Naked Single)
22. Row 1 / Column 9 → 8 (Naked Single)
23. Row 3 / Column 9 → 6 (Full House)
24. Row 2 / Column 4 → 5 (Naked Single)
25. Row 2 / Column 5 → 2 (Full House)
26. Row 1 / Column 5 → 1 (Naked Single)
27. Row 1 / Column 6 → 4 (Full House)
28. Row 6 / Column 4 → 1 (Naked Single)
29. Row 6 / Column 3 → 5 (Full House)
30. Row 5 / Column 1 → 1 (Full House)
31. Row 5 / Column 4 → 6 (Naked Single)
32. Row 9 / Column 4 → 8 (Naked Single)
33. Row 8 / Column 1 → 8 (Naked Single)
34. Row 5 / Column 5 → 5 (Naked Single)
35. Row 5 / Column 6 → 2 (Full House)
36. Row 4 / Column 4 → 7 (Naked Single)
37. Row 7 / Column 4 → 4 (Full House)
38. Row 4 / Column 6 → 8 (Full House)
39. Row 9 / Column 7 → 2 (Naked Single)
40. Row 7 / Column 1 → 5 (Naked Single)
41. Row 9 / Column 1 → 3 (Full House)
42. Row 8 / Column 7 → 6 (Naked Single)
43. Row 7 / Column 7 → 8 (Full House)
44. Row 7 / Column 5 → 6 (Naked Single)
45. Row 7 / Column 3 → 2 (Full House)
46. Row 3 / Column 6 → 7 (Naked Single)
47. Row 3 / Column 5 → 8 (Full House)
48. Row 8 / Column 5 → 7 (Full House)
49. Row 9 / Column 3 → 1 (Naked Single)
50. Row 8 / Column 3 → 4 (Full House)
51. Row 8 / Column 6 → 1 (Full House)
52. Row 9 / Column 6 → 5 (Full House)