# Solution for Evil Sudoku #1359783124641

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

This Sudoku Puzzle has 74 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Hidden Pair, undefined, AIC, Locked Pair, Continuous Nice Loop, Skyscraper, Sue de Coq techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 3 → 7 (Naked Single)
2. Row 5 / Column 7 → 2 (Naked Single)
3. Row 5 / Column 8 → 8 (Naked Single)
4. Row 5 / Column 2 → 4 (Full House)
5. Row 1 / Column 9 → 4 (Hidden Single)
6. Row 4 / Column 4 → 4 (Hidden Single)
7. Row 7 / Column 1 → 4 (Hidden Single)
8. Row 1 / Column 8 → 5 (Hidden Single)
9. Locked Candidates Type 1 (Pointing): 9 in b3 => r2c16<>9
10. Locked Candidates Type 1 (Pointing): 5 in b6 => r4c6<>5
11. Locked Candidates Type 1 (Pointing): 7 in b7 => r8c79<>7
12. Locked Candidates Type 2 (Claiming): 6 in r1 => r2c13,r3c12<>6
13. Naked Triple: 2,3,6 in r247c6 => r38c6<>6, r68c6<>2, r8c6<>3
14. Hidden Pair: 8,9 in r8c6,r9c5 => r9c5<>1, r9c5<>3
15. 2-String Kite: 6 in r3c9,r7c6 (connected by r2c6,r3c4) => r7c9<>6
16. Locked Candidates Type 2 (Claiming): 6 in r7 => r8c4<>6
17. XY-Wing: 1/2/6 in r14c2,r6c3 => r1c3<>6
18. Row 1 / Column 3 → 3 (Naked Single)
19. XY-Chain: 6 6- r1c2 -2- r1c5 -9- r9c5 -8- r8c6 -9- r8c7 -6 => r8c2<>6
20. AIC: 6 6- r3c9 =6= r3c4 =5= r3c6 =9= r8c6 -9- r8c7 -6 => r2c7,r89c9<>6
21. Locked Pair: 7,9 in r2c78 => r2c19,r3c9<>7
22. Continuous Nice Loop: 1/2/3/6 6= r1c1 =9= r3c1 =7= r8c1 =3= r8c4 -3- r2c4 =3= r2c6 -3- r4c6 -2- r4c2 =2= r1c2 =6= r1c1 =9 => r38c1<>1, r1c1,r4c5<>2, r7c46<>3, r8c1<>6
23. Skyscraper: 2 in r1c5,r4c6 (connected by r14c2) => r2c6,r6c5<>2
24. X-Wing: 2 r26 c14 => r78c4<>2
25. Row 8 / Column 9 → 2 (Hidden Single)
26. Sue de Coq: r23c4 - {12356} (r78c4 - {136}, r1c5,r3c6 - {259}) => r3c5<>9
27. Row 3 / Column 5 → 1 (Naked Single)
28. XY-Chain: 6 6- r2c6 -3- r4c6 -2- r6c4 -5- r3c4 -6 => r2c4<>6
29. XY-Chain: 7 7- r4c5 -3- r4c6 -2- r7c6 -6- r7c4 -1- r7c9 -7 => r4c9<>7
30. Row 7 / Column 9 → 7 (Hidden Single)
31. Finned X-Wing: 1 c29 r49 fr8c2 => r9c1<>1
32. Hidden Pair: 1,2 in r26c1 => r6c1<>6
33. Row 6 / Column 3 → 6 (Hidden Single)
34. Row 8 / Column 7 → 6 (Hidden Single)
35. Row 8 / Column 6 → 9 (Hidden Single)
36. Row 3 / Column 6 → 5 (Naked Single)
37. Row 9 / Column 5 → 8 (Naked Single)
38. Row 3 / Column 4 → 6 (Naked Single)
39. Row 6 / Column 6 → 8 (Naked Single)
40. Row 6 / Column 5 → 7 (Naked Single)
41. Row 2 / Column 6 → 3 (Naked Single)
42. Row 3 / Column 9 → 8 (Naked Single)
43. Row 7 / Column 4 → 1 (Naked Single)
44. Row 4 / Column 5 → 3 (Naked Single)
45. Row 6 / Column 8 → 1 (Naked Single)
46. Row 2 / Column 4 → 2 (Naked Single)
47. Row 1 / Column 5 → 9 (Full House)
48. Row 7 / Column 5 → 2 (Full House)
49. Row 4 / Column 6 → 2 (Naked Single)
50. Row 6 / Column 4 → 5 (Full House)
51. Row 8 / Column 4 → 3 (Full House)
52. Row 6 / Column 1 → 2 (Full House)
53. Row 7 / Column 6 → 6 (Full House)
54. Row 7 / Column 8 → 3 (Full House)
55. Row 4 / Column 2 → 1 (Full House)
56. Row 2 / Column 9 → 6 (Naked Single)
57. Row 3 / Column 2 → 7 (Naked Single)
58. Row 3 / Column 1 → 9 (Full House)
59. Row 4 / Column 9 → 5 (Naked Single)
60. Row 4 / Column 7 → 7 (Full House)
61. Row 9 / Column 9 → 1 (Full House)
62. Row 2 / Column 1 → 1 (Naked Single)
63. Row 1 / Column 1 → 6 (Naked Single)
64. Row 1 / Column 2 → 2 (Full House)
65. Row 2 / Column 3 → 8 (Full House)
66. Row 8 / Column 3 → 1 (Full House)
67. Row 8 / Column 1 → 7 (Naked Single)
68. Row 8 / Column 2 → 8 (Full House)
69. Row 9 / Column 2 → 6 (Full House)
70. Row 9 / Column 1 → 3 (Full House)
71. Row 9 / Column 8 → 9 (Naked Single)
72. Row 2 / Column 8 → 7 (Full House)
73. Row 2 / Column 7 → 9 (Full House)
74. Row 9 / Column 7 → 5 (Full House)