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

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), Naked Triple, undefined techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 4 → 2 (Naked Single)
2. Row 5 / Column 6 → 1 (Naked Single)
3. Row 5 / Column 1 → 6 (Naked Single)
4. Row 5 / Column 9 → 5 (Full House)
5. Row 6 / Column 5 → 4 (Naked Single)
6. Row 4 / Column 5 → 9 (Full House)
7. Row 6 / Column 2 → 2 (Naked Single)
8. Row 4 / Column 2 → 4 (Naked Single)
9. Row 4 / Column 1 → 1 (Full House)
10. Row 4 / Column 8 → 2 (Full House)
11. Row 6 / Column 8 → 1 (Naked Single)
12. Row 6 / Column 9 → 7 (Full House)
13. Row 1 / Column 5 → 5 (Hidden Single)
14. Row 7 / Column 9 → 3 (Hidden Single)
15. Row 1 / Column 8 → 3 (Hidden Single)
16. Row 8 / Column 1 → 5 (Hidden Single)
17. Row 9 / Column 7 → 5 (Hidden Single)
18. Row 3 / Column 5 → 3 (Hidden Single)
19. Row 2 / Column 2 → 3 (Hidden Single)
20. Locked Candidates Type 1 (Pointing): 9 in b3 => r89c9<>9
21. Locked Candidates Type 2 (Claiming): 4 in r8 => r7c7,r9c9<>4
22. Naked Triple: 2,4,6 in r8c579 => r8c6<>2, r8c6<>6
23. X-Wing: 6 r27 c35 => r19c3,r89c5<>6
24. Row 8 / Column 5 → 2 (Naked Single)
25. Row 8 / Column 7 → 4 (Naked Single)
26. Row 3 / Column 7 → 7 (Naked Single)
27. Row 8 / Column 9 → 6 (Naked Single)
28. Row 1 / Column 7 → 1 (Naked Single)
29. Row 7 / Column 7 → 2 (Full House)
30. Row 9 / Column 9 → 1 (Naked Single)
31. Row 2 / Column 9 → 9 (Naked Single)
32. Row 3 / Column 9 → 4 (Full House)
33. Row 9 / Column 5 → 7 (Naked Single)
34. Row 2 / Column 4 → 7 (Naked Single)
35. Row 2 / Column 5 → 6 (Naked Single)
36. Row 7 / Column 5 → 1 (Full House)
37. Row 2 / Column 1 → 2 (Naked Single)
38. Row 2 / Column 3 → 1 (Full House)
39. Row 3 / Column 1 → 9 (Naked Single)
40. Row 3 / Column 3 → 8 (Naked Single)
41. Row 3 / Column 6 → 2 (Full House)
42. Row 1 / Column 2 → 6 (Naked Single)
43. Row 9 / Column 2 → 9 (Full House)
44. Row 7 / Column 1 → 4 (Naked Single)
45. Row 1 / Column 1 → 7 (Full House)
46. Row 1 / Column 3 → 4 (Full House)
47. Row 9 / Column 8 → 8 (Naked Single)
48. Row 8 / Column 8 → 9 (Full House)
49. Row 8 / Column 6 → 8 (Full House)
50. Row 7 / Column 3 → 6 (Naked Single)
51. Row 7 / Column 4 → 9 (Full House)
52. Row 9 / Column 3 → 2 (Full House)
53. Row 9 / Column 4 → 4 (Naked Single)
54. Row 9 / Column 6 → 6 (Full House)
55. Row 1 / Column 6 → 9 (Full House)
56. Row 1 / Column 4 → 8 (Full House)