# Solution for Evil Sudoku #1177713524895

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

This Sudoku Puzzle has 70 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Hidden Pair, Locked Pair, Naked Single, Full House techniques.

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## Solution Steps:

1. Row 6 / Column 2 → 7 (Hidden Single)
2. Row 9 / Column 5 → 1 (Hidden Single)
3. Row 2 / Column 8 → 7 (Hidden Single)
4. Row 9 / Column 7 → 4 (Hidden Single)
5. Row 3 / Column 8 → 8 (Hidden Single)
6. Locked Candidates Type 1 (Pointing): 4 in b1 => r1c5<>4
7. Locked Candidates Type 1 (Pointing): 8 in b2 => r2c1<>8
8. Locked Candidates Type 1 (Pointing): 1 in b4 => r1c3<>1
9. Locked Candidates Type 1 (Pointing): 5 in b9 => r5c9<>5
10. Locked Candidates Type 2 (Claiming): 3 in r9 => r78c8,r8c9<>3
11. Locked Candidates Type 2 (Claiming): 2 in c8 => r89c9<>2
12. Hidden Pair: 4,8 in r1c13 => r1c13<>2, r1c13<>6, r1c13<>9
13. Row 2 / Column 1 → 2 (Hidden Single)
14. Locked Candidates Type 1 (Pointing): 5 in b1 => r78c2<>5
15. Locked Candidates Type 1 (Pointing): 6 in b1 => r78c2<>6
16. Locked Pair: 3,9 in r78c2 => r123c2,r7c13,r89c3,r9c1<>9
17. Locked Candidates Type 2 (Claiming): 9 in r9 => r78c8,r8c9<>9
18. Locked Pair: 2,6 in r78c8 => r49c8,r89c9<>6, r9c8<>2
19. Row 8 / Column 9 → 5 (Naked Single)
20. Row 9 / Column 3 → 2 (Hidden Single)
21. Row 7 / Column 4 → 5 (Hidden Single)
22. Row 9 / Column 1 → 5 (Hidden Single)
23. Locked Pair: 4,6 in r7c13 => r7c5,r8c3<>4, r7c58,r8c3<>6
24. Row 7 / Column 8 → 2 (Naked Single)
25. Row 8 / Column 3 → 6 (Naked Single)
26. Row 8 / Column 8 → 6 (Naked Single)
27. Row 7 / Column 1 → 4 (Naked Single)
28. Row 7 / Column 3 → 4 (Naked Single)
29. Row 1 / Column 1 → 8 (Naked Single)
30. Row 1 / Column 3 → 8 (Naked Single)
31. Row 5 / Column 9 → 8 (Hidden Single)
32. Locked Candidates Type 2 (Claiming): 9 in c1 => r456c3<>9
33. Row 5 / Column 3 → 5 (Naked Single)
34. Row 6 / Column 3 → 1 (Naked Single)
35. Row 4 / Column 3 → 1 (Naked Single)
36. Row 4 / Column 7 → 5 (Hidden Single)
37. Locked Pair: 6,9 in r6c46 => r4c46,r5c5,r6c79<>6, r4c46,r5c5,r6c79<>9
38. Row 6 / Column 7 → 2 (Naked Single)
39. Row 6 / Column 9 → 2 (Naked Single)
40. Row 4 / Column 6 → 4 (Naked Single)
41. Row 5 / Column 5 → 3 (Naked Single)
42. Row 4 / Column 4 → 3 (Naked Single)
43. Row 7 / Column 5 → 9 (Naked Single)
44. Row 4 / Column 8 → 9 (Naked Single)
45. Row 2 / Column 5 → 6 (Naked Single)
46. Row 7 / Column 2 → 3 (Naked Single)
47. Row 4 / Column 1 → 6 (Naked Single)
48. Row 5 / Column 1 → 9 (Full House)
49. Row 5 / Column 7 → 6 (Full House)
50. Row 9 / Column 8 → 3 (Naked Single)
51. Row 9 / Column 9 → 9 (Full House)
52. Row 1 / Column 5 → 2 (Naked Single)
53. Row 3 / Column 5 → 4 (Full House)
54. Row 8 / Column 5 → 4 (Full House)
55. Row 8 / Column 2 → 9 (Naked Single)
56. Row 1 / Column 9 → 6 (Naked Single)
57. Row 8 / Column 4 → 8 (Naked Single)
58. Row 1 / Column 2 → 1 (Naked Single)
59. Row 3 / Column 9 → 3 (Naked Single)
60. Row 2 / Column 4 → 9 (Naked Single)
61. Row 8 / Column 6 → 2 (Naked Single)
62. Row 1 / Column 7 → 9 (Naked Single)
63. Row 2 / Column 2 → 5 (Naked Single)
64. Row 3 / Column 2 → 6 (Full House)
65. Row 3 / Column 7 → 9 (Naked Single)
66. Row 2 / Column 7 → 1 (Naked Single)
67. Row 2 / Column 6 → 8 (Full House)
68. Row 3 / Column 6 → 5 (Full House)
69. Row 6 / Column 4 → 6 (Naked Single)
70. Row 6 / Column 6 → 9 (Full House)