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

This Sudoku Puzzle has 56 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 1 / Column 5 → 6 (Naked Single)
2. Row 9 / Column 4 → 9 (Naked Single)
3. Row 3 / Column 5 → 3 (Naked Single)
4. Row 6 / Column 4 → 6 (Naked Single)
5. Row 7 / Column 4 → 8 (Naked Single)
6. Row 2 / Column 4 → 7 (Full House)
7. Row 3 / Column 6 → 8 (Naked Single)
8. Row 1 / Column 6 → 1 (Full House)
9. Row 8 / Column 5 → 4 (Naked Single)
10. Row 5 / Column 5 → 5 (Full House)
11. Row 1 / Column 1 → 4 (Naked Single)
12. Row 1 / Column 7 → 7 (Full House)
13. Row 8 / Column 8 → 3 (Naked Single)
14. Row 8 / Column 2 → 7 (Hidden Single)
15. Row 5 / Column 6 → 7 (Hidden Single)
16. Row 9 / Column 7 → 5 (Hidden Single)
17. Row 2 / Column 8 → 8 (Hidden Single)
18. Row 4 / Column 8 → 7 (Hidden Single)
19. Row 8 / Column 1 → 8 (Hidden Single)
20. Row 4 / Column 2 → 8 (Hidden Single)
21. Row 8 / Column 3 → 1 (Hidden Single)
22. Row 6 / Column 9 → 1 (Hidden Single)
23. Locked Candidates Type 1 (Pointing): 9 in b7 => r7c7<>9
24. Locked Candidates Type 2 (Claiming): 2 in r8 => r7c7<>2
25. W-Wing: 2/3 in r2c3,r7c6 connected by 3 in r27c2 => r7c3<>2
26. Row 7 / Column 6 → 2 (Hidden Single)
27. Row 9 / Column 6 → 3 (Full House)
28. Row 9 / Column 1 → 2 (Full House)
29. Row 2 / Column 3 → 2 (Hidden Single)
30. Row 3 / Column 9 → 2 (Hidden Single)
31. Row 8 / Column 9 → 9 (Naked Single)
32. Row 8 / Column 7 → 2 (Full House)
33. Row 3 / Column 8 → 5 (Hidden Single)
34. Row 6 / Column 8 → 4 (Naked Single)
35. Row 7 / Column 8 → 6 (Full House)
36. Row 7 / Column 7 → 4 (Full House)
37. Row 5 / Column 9 → 6 (Naked Single)
38. Row 6 / Column 6 → 9 (Naked Single)
39. Row 4 / Column 6 → 4 (Full House)
40. Row 2 / Column 7 → 6 (Naked Single)
41. Row 2 / Column 9 → 4 (Full House)
42. Row 4 / Column 9 → 5 (Full House)
43. Row 6 / Column 7 → 3 (Naked Single)
44. Row 4 / Column 7 → 9 (Full House)
45. Row 6 / Column 3 → 5 (Full House)
46. Row 4 / Column 3 → 3 (Naked Single)
47. Row 4 / Column 1 → 6 (Full House)
48. Row 7 / Column 3 → 9 (Naked Single)
49. Row 5 / Column 3 → 4 (Full House)
50. Row 7 / Column 2 → 3 (Full House)
51. Row 3 / Column 1 → 9 (Naked Single)
52. Row 3 / Column 2 → 6 (Full House)
53. Row 2 / Column 2 → 1 (Naked Single)
54. Row 2 / Column 1 → 3 (Full House)
55. Row 5 / Column 1 → 1 (Full House)
56. Row 5 / Column 2 → 9 (Full House)