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

This Sudoku Puzzle has 51 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Single, Full House, Locked Pair techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 1 / Column 4 → 2 (Hidden Single)
2. Locked Candidates Type 1 (Pointing): 4 in b5 => r28c6<>4
3. Row 8 / Column 4 → 4 (Hidden Single)
4. Locked Candidates Type 1 (Pointing): 5 in b5 => r17c6<>5
5. Row 1 / Column 6 → 1 (Naked Single)
6. Row 1 / Column 7 → 3 (Naked Single)
7. Row 1 / Column 2 → 5 (Full House)
8. Row 2 / Column 7 → 1 (Full House)
9. Row 2 / Column 4 → 7 (Naked Single)
10. Row 8 / Column 6 → 7 (Naked Single)
11. Row 3 / Column 4 → 5 (Naked Single)
12. Row 9 / Column 4 → 1 (Full House)
13. Locked Pair: 2,3 in r9c89 => r8c9,r9c1<>3, r7c89<>2
14. Row 8 / Column 9 → 1 (Naked Single)
15. Row 8 / Column 3 → 3 (Full House)
16. Row 5 / Column 8 → 1 (Hidden Single)
17. Row 2 / Column 2 → 3 (Hidden Single)
18. Row 2 / Column 5 → 4 (Hidden Single)
19. Row 4 / Column 2 → 4 (Hidden Single)
20. Row 5 / Column 1 → 9 (Naked Single)
21. Row 3 / Column 1 → 4 (Naked Single)
22. Row 5 / Column 9 → 2 (Naked Single)
23. Row 5 / Column 6 → 4 (Full House)
24. Row 9 / Column 9 → 3 (Naked Single)
25. Row 6 / Column 9 → 6 (Naked Single)
26. Row 9 / Column 8 → 2 (Naked Single)
27. Row 4 / Column 8 → 3 (Naked Single)
28. Row 4 / Column 9 → 9 (Full House)
29. Row 6 / Column 2 → 2 (Naked Single)
30. Row 7 / Column 2 → 6 (Full House)
31. Row 4 / Column 3 → 5 (Naked Single)
32. Row 6 / Column 6 → 5 (Naked Single)
33. Row 4 / Column 6 → 2 (Full House)
34. Row 4 / Column 1 → 6 (Full House)
35. Row 7 / Column 6 → 9 (Naked Single)
36. Row 2 / Column 6 → 6 (Full House)
37. Row 3 / Column 5 → 9 (Full House)
38. Row 9 / Column 1 → 5 (Naked Single)
39. Row 9 / Column 5 → 6 (Full House)
40. Row 7 / Column 5 → 5 (Full House)
41. Row 6 / Column 3 → 1 (Naked Single)
42. Row 6 / Column 1 → 3 (Full House)
43. Row 7 / Column 1 → 1 (Full House)
44. Row 7 / Column 3 → 2 (Full House)
45. Row 2 / Column 8 → 8 (Naked Single)
46. Row 2 / Column 3 → 9 (Full House)
47. Row 3 / Column 3 → 8 (Full House)
48. Row 3 / Column 9 → 7 (Naked Single)
49. Row 3 / Column 8 → 6 (Full House)
50. Row 7 / Column 8 → 7 (Full House)
51. Row 7 / Column 9 → 8 (Full House)