# Solution for Evil Sudoku #1357713524895

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

This Sudoku Puzzle has 67 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Single, Locked Triple, Naked Pair, Full House techniques.

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## Solution Steps:

1. Row 1 / Column 5 → 1 (Hidden Single)
2. Row 4 / Column 8 → 7 (Hidden Single)
3. Row 1 / Column 3 → 4 (Hidden Single)
4. Row 2 / Column 1 → 5 (Hidden Single)
5. Row 9 / Column 5 → 7 (Hidden Single)
6. Row 8 / Column 2 → 7 (Hidden Single)
7. Row 3 / Column 8 → 5 (Hidden Single)
8. Row 7 / Column 2 → 8 (Hidden Single)
9. Row 2 / Column 8 → 3 (Hidden Single)
10. Locked Candidates Type 1 (Pointing): 3 in b2 => r3c2<>3
11. Locked Candidates Type 1 (Pointing): 1 in b6 => r9c7<>1
12. Locked Candidates Type 1 (Pointing): 8 in b8 => r8c9<>8
13. Locked Candidates Type 2 (Claiming): 2 in c2 => r1c1<>2
14. Locked Candidates Type 2 (Claiming): 6 in c8 => r89c9,r9c7<>6
15. Locked Candidates Type 2 (Claiming): 9 in c8 => r89c9,r9c7<>9
16. Row 8 / Column 9 → 2 (Naked Single)
17. Locked Triple: 6,8,9 in r8c456 => r7c45,r8c38<>6, r7c45,r8c38<>9
18. Row 8 / Column 3 → 1 (Naked Single)
19. Row 8 / Column 8 → 1 (Naked Single)
20. Locked Candidates Type 1 (Pointing): 2 in b8 => r7c13<>2
21. Naked Pair: 6,9 in r16c9 => r35c9<>6, r35c9<>9
22. Row 3 / Column 9 → 4 (Naked Single)
23. Row 5 / Column 9 → 8 (Naked Single)
24. Row 9 / Column 9 → 8 (Naked Single)
25. Row 9 / Column 7 → 4 (Naked Single)
26. Row 4 / Column 1 → 8 (Hidden Single)
27. Row 4 / Column 3 → 2 (Hidden Single)
28. Row 9 / Column 1 → 2 (Hidden Single)
29. Locked Triple: 2,6,9 in r123c7 => r1c9,r456c7<>6, r1c9,r456c7<>9
30. Row 4 / Column 7 → 1 (Naked Single)
31. Row 5 / Column 7 → 5 (Naked Single)
32. Row 1 / Column 9 → 9 (Naked Single)
33. Row 6 / Column 7 → 5 (Naked Single)
34. Row 6 / Column 9 → 6 (Naked Single)
35. Row 6 / Column 4 → 1 (Hidden Single)
36. Row 6 / Column 6 → 4 (Hidden Single)
37. Row 3 / Column 6 → 3 (Hidden Single)
38. Row 5 / Column 5 → 3 (Hidden Single)
39. Locked Candidates Type 1 (Pointing): 9 in b1 => r6c2<>9
40. Row 6 / Column 2 → 3 (Naked Single)
41. Row 6 / Column 3 → 9 (Naked Single)
42. Row 5 / Column 1 → 6 (Full House)
43. Row 5 / Column 3 → 6 (Full House)
44. Row 9 / Column 3 → 6 (Naked Single)
45. Row 1 / Column 1 → 3 (Naked Single)
46. Row 7 / Column 1 → 9 (Full House)
47. Row 7 / Column 3 → 3 (Naked Single)
48. Row 9 / Column 8 → 9 (Naked Single)
49. Row 7 / Column 8 → 6 (Naked Single)
50. Locked Candidates Type 2 (Claiming): 6 in c3 => r123c2<>6
51. Row 1 / Column 2 → 2 (Naked Single)
52. Row 2 / Column 2 → 9 (Full House)
53. Row 3 / Column 2 → 9 (Full House)
54. Row 1 / Column 7 → 6 (Naked Single)
55. Row 2 / Column 7 → 2 (Naked Single)
56. Row 3 / Column 7 → 2 (Naked Single)
57. Row 3 / Column 5 → 6 (Naked Single)
58. Row 2 / Column 5 → 4 (Naked Single)
59. Row 2 / Column 6 → 8 (Full House)
60. Row 2 / Column 4 → 8 (Full House)
61. Row 8 / Column 5 → 9 (Naked Single)
62. Row 7 / Column 5 → 2 (Full House)
63. Row 7 / Column 4 → 4 (Full House)
64. Row 8 / Column 4 → 6 (Full House)
65. Row 8 / Column 6 → 6 (Full House)
66. Row 4 / Column 4 → 9 (Full House)
67. Row 4 / Column 6 → 9 (Full House)