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

This Sudoku Puzzle has 55 steps and it is solved using Naked Single, Full House, Hidden Single, Naked Triple, Locked Candidates Type 1 (Pointing), undefined techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 8 / Column 2 → 2 (Naked Single)
2. Row 6 / Column 8 → 7 (Naked Single)
3. Row 9 / Column 2 → 5 (Naked Single)
4. Row 4 / Column 8 → 8 (Naked Single)
5. Row 4 / Column 9 → 1 (Naked Single)
6. Row 4 / Column 2 → 6 (Naked Single)
7. Row 6 / Column 2 → 1 (Full House)
8. Row 6 / Column 6 → 3 (Naked Single)
9. Row 6 / Column 4 → 6 (Full House)
10. Row 9 / Column 6 → 2 (Hidden Single)
11. Row 7 / Column 5 → 5 (Hidden Single)
12. Row 5 / Column 5 → 8 (Naked Single)
13. Row 5 / Column 6 → 1 (Hidden Single)
14. Row 9 / Column 5 → 9 (Hidden Single)
15. Row 1 / Column 6 → 9 (Hidden Single)
16. Row 3 / Column 1 → 9 (Hidden Single)
17. Row 1 / Column 4 → 8 (Hidden Single)
18. Row 8 / Column 6 → 8 (Hidden Single)
19. Row 2 / Column 4 → 1 (Hidden Single)
20. Row 4 / Column 4 → 5 (Hidden Single)
21. Row 4 / Column 6 → 7 (Full House)
22. Row 2 / Column 6 → 5 (Full House)
23. Row 3 / Column 8 → 5 (Hidden Single)
24. Naked Triple: 2,3,7 in r13c9,r2c8 => r1c7<>2, r13c7<>7
25. Locked Candidates Type 1 (Pointing): 7 in b3 => r79c9<>7
26. W-Wing: 7/2 in r2c3,r7c7 connected by 2 in r27c8 => r7c3<>7
27. Locked Candidates Type 1 (Pointing): 7 in b7 => r1c1<>7
28. XY-Wing: 2/3/7 in r1c9,r2c58 => r1c5<>7
29. Row 1 / Column 5 → 6 (Naked Single)
30. Row 1 / Column 7 → 1 (Naked Single)
31. Row 1 / Column 1 → 5 (Naked Single)
32. Row 3 / Column 7 → 6 (Naked Single)
33. Row 5 / Column 1 → 3 (Naked Single)
34. Row 5 / Column 3 → 5 (Full House)
35. Row 8 / Column 1 → 7 (Naked Single)
36. Row 8 / Column 4 → 3 (Full House)
37. Row 9 / Column 4 → 7 (Full House)
38. Row 9 / Column 1 → 8 (Naked Single)
39. Row 7 / Column 1 → 1 (Full House)
40. Row 7 / Column 3 → 3 (Full House)
41. Row 9 / Column 7 → 4 (Naked Single)
42. Row 9 / Column 9 → 3 (Full House)
43. Row 7 / Column 8 → 2 (Naked Single)
44. Row 2 / Column 8 → 3 (Full House)
45. Row 5 / Column 7 → 2 (Naked Single)
46. Row 7 / Column 7 → 7 (Full House)
47. Row 7 / Column 9 → 8 (Full House)
48. Row 5 / Column 9 → 4 (Full House)
49. Row 3 / Column 9 → 7 (Naked Single)
50. Row 1 / Column 9 → 2 (Full House)
51. Row 1 / Column 3 → 7 (Full House)
52. Row 2 / Column 5 → 7 (Naked Single)
53. Row 3 / Column 5 → 3 (Full House)
54. Row 3 / Column 3 → 1 (Full House)
55. Row 2 / Column 3 → 2 (Full House)