# Solution for Evil Sudoku #1229713524895

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

This Sudoku Puzzle has 64 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Hidden Pair, Naked Quadruple, Naked Single, Full House techniques.

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## Solution Steps:

1. Row 5 / Column 1 → 1 (Hidden Single)
2. Row 7 / Column 1 → 4 (Hidden Single)
3. Locked Candidates Type 1 (Pointing): 4 in b3 => r5c9<>4
4. Locked Candidates Type 1 (Pointing): 5 in b7 => r9c5<>5
5. Locked Candidates Type 1 (Pointing): 9 in b7 => r8c78<>9
6. Locked Candidates Type 1 (Pointing): 8 in b8 => r9c79<>8
7. Locked Candidates Type 2 (Claiming): 3 in c1 => r8c23,r9c2<>3
8. Locked Candidates Type 2 (Claiming): 8 in c9 => r1c8<>8
9. Hidden Pair: 4,8 in r13c9 => r13c9<>6, r13c9<>9, r3c9<>1
10. Locked Candidates Type 1 (Pointing): 1 in b3 => r2c4<>1
11. Naked Quadruple: 3,4,6,9 in r5c2357 => r5c89<>6, r5c89<>9
12. Row 5 / Column 8 → 7 (Naked Single)
13. Row 5 / Column 9 → 7 (Naked Single)
14. Row 9 / Column 9 → 6 (Naked Single)
15. Row 9 / Column 7 → 3 (Naked Single)
16. Row 7 / Column 7 → 9 (Naked Single)
17. Row 8 / Column 7 → 8 (Naked Single)
18. Row 9 / Column 1 → 5 (Naked Single)
19. Row 9 / Column 5 → 8 (Naked Single)
20. Row 7 / Column 9 → 1 (Naked Single)
21. Row 8 / Column 8 → 2 (Full House)
22. Row 7 / Column 8 → 2 (Full House)
23. Row 9 / Column 2 → 2 (Naked Single)
24. Row 9 / Column 4 → 7 (Full House)
25. Row 2 / Column 9 → 9 (Naked Single)
26. Row 8 / Column 3 → 6 (Naked Single)
27. Row 7 / Column 4 → 6 (Naked Single)
28. Row 2 / Column 4 → 6 (Naked Single)
29. Row 8 / Column 2 → 9 (Naked Single)
30. Row 8 / Column 6 → 3 (Full House)
31. Row 8 / Column 1 → 3 (Full House)
32. Row 7 / Column 5 → 5 (Full House)
33. Row 7 / Column 6 → 5 (Full House)
34. Row 4 / Column 4 → 9 (Naked Single)
35. Row 6 / Column 4 → 1 (Naked Single)
36. Row 2 / Column 7 → 5 (Naked Single)
37. Row 1 / Column 5 → 9 (Naked Single)
38. Row 3 / Column 5 → 9 (Naked Single)
39. Row 1 / Column 6 → 7 (Naked Single)
40. Row 3 / Column 6 → 1 (Naked Single)
41. Row 3 / Column 4 → 8 (Naked Single)
42. Row 1 / Column 8 → 6 (Naked Single)
43. Row 2 / Column 2 → 3 (Naked Single)
44. Row 2 / Column 8 → 1 (Naked Single)
45. Row 1 / Column 1 → 6 (Naked Single)
46. Row 3 / Column 1 → 6 (Naked Single)
47. Row 3 / Column 9 → 4 (Naked Single)
48. Row 1 / Column 9 → 8 (Full House)
49. Row 2 / Column 3 → 7 (Naked Single)
50. Row 3 / Column 2 → 5 (Naked Single)
51. Row 1 / Column 3 → 4 (Naked Single)
52. Row 3 / Column 3 → 2 (Naked Single)
53. Row 5 / Column 3 → 3 (Naked Single)
54. Row 4 / Column 3 → 5 (Full House)
55. Row 5 / Column 5 → 6 (Naked Single)
56. Row 4 / Column 6 → 4 (Full House)
57. Row 6 / Column 6 → 4 (Full House)
58. Row 4 / Column 8 → 8 (Naked Single)
59. Row 4 / Column 2 → 6 (Full House)
60. Row 5 / Column 2 → 4 (Naked Single)
61. Row 6 / Column 2 → 8 (Full House)
62. Row 5 / Column 7 → 4 (Naked Single)
63. Row 6 / Column 7 → 6 (Naked Single)
64. Row 6 / Column 8 → 5 (Naked Single)