Solution for Hard Sudoku #118713524895

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

This Sudoku Puzzle has 55 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming) techniques.

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Solution Steps:

1. Row 6 / Column 9 → 8 (Hidden Single)
2. Row 1 / Column 9 → 9 (Hidden Single)
3. Row 5 / Column 7 → 7 (Hidden Single)
4. Row 5 / Column 3 → 2 (Hidden Single)
5. Row 5 / Column 9 → 6 (Naked Single)
6. Row 5 / Column 1 → 4 (Full House)
7. Row 7 / Column 9 → 2 (Naked Single)
8. Row 2 / Column 9 → 5 (Full House)
9. Row 2 / Column 7 → 4 (Hidden Single)
10. Row 6 / Column 8 → 4 (Hidden Single)
11. Row 4 / Column 7 → 2 (Hidden Single)
12. Row 4 / Column 8 → 5 (Full House)
13. Row 3 / Column 8 → 2 (Hidden Single)
14. Row 1 / Column 8 → 1 (Hidden Single)
15. Locked Candidates Type 1 (Pointing): 6 in b5 => r123789c5<>6
16. Locked Candidates Type 1 (Pointing): 9 in b5 => r789c5<>9
17. Row 7 / Column 7 → 9 (Hidden Single)
18. Locked Candidates Type 2 (Claiming): 1 in c3 => r3c12<>1
19. Row 3 / Column 1 → 6 (Naked Single)
20. Row 3 / Column 6 → 5 (Naked Single)
21. Row 8 / Column 1 → 9 (Naked Single)
22. Row 4 / Column 1 → 1 (Full House)
23. Row 9 / Column 1 → 1 (Full House)
24. Row 4 / Column 2 → 6 (Naked Single)
25. Row 4 / Column 5 → 9 (Full House)
26. Row 6 / Column 5 → 6 (Full House)
27. Row 6 / Column 2 → 5 (Naked Single)
28. Row 6 / Column 3 → 9 (Full House)
29. Row 1 / Column 2 → 4 (Naked Single)
30. Row 1 / Column 3 → 5 (Naked Single)
31. Row 3 / Column 2 → 3 (Naked Single)
32. Row 2 / Column 3 → 1 (Full House)
33. Row 3 / Column 3 → 1 (Full House)
34. Row 7 / Column 2 → 7 (Full House)
35. Row 9 / Column 2 → 7 (Full House)
36. Row 3 / Column 5 → 4 (Naked Single)
37. Row 7 / Column 5 → 3 (Naked Single)
38. Row 2 / Column 5 → 2 (Naked Single)
39. Row 7 / Column 8 → 6 (Naked Single)
40. Row 7 / Column 4 → 4 (Full House)
41. Row 8 / Column 7 → 5 (Full House)
42. Row 9 / Column 7 → 5 (Full House)
43. Row 9 / Column 8 → 3 (Full House)
44. Row 8 / Column 5 → 8 (Naked Single)
45. Row 9 / Column 5 → 2 (Naked Single)
46. Row 2 / Column 6 → 6 (Naked Single)
47. Row 2 / Column 4 → 3 (Full House)
48. Row 8 / Column 4 → 6 (Naked Single)
49. Row 9 / Column 4 → 6 (Naked Single)
50. Row 1 / Column 5 → 7 (Naked Single)
51. Row 8 / Column 6 → 6 (Naked Single)
52. Row 1 / Column 4 → 7 (Naked Single)
53. Row 1 / Column 6 → 8 (Naked Single)
54. Row 9 / Column 6 → 9 (Naked Single)
55. Row 8 / Column 3 → 4 (Hidden Single)