# Solution for Evil Sudoku #1424183965741

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

This Sudoku Puzzle has 71 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 3 / Column 5 → 1 (Naked Single)
2. Row 7 / Column 5 → 6 (Naked Single)
3. Row 8 / Column 5 → 8 (Naked Single)
4. Row 2 / Column 5 → 5 (Full House)
5. Row 4 / Column 6 → 5 (Hidden Single)
6. Row 1 / Column 3 → 5 (Hidden Single)
7. Row 9 / Column 9 → 5 (Hidden Single)
8. Row 8 / Column 9 → 2 (Hidden Single)
9. Locked Candidates Type 1 (Pointing): 1 in b1 => r79c2<>1
10. Locked Candidates Type 1 (Pointing): 2 in b8 => r6c6<>2
11. Locked Candidates Type 1 (Pointing): 4 in b9 => r16c8<>4
12. Locked Candidates Type 2 (Claiming): 7 in c9 => r1c78,r2c7,r3c8<>7
13. Naked Triple: 3,6,7 in r6c368 => r6c2<>3, r6c24<>6, r6c27<>7
14. Hidden Pair: 4,8 in r5c1,r6c2 => r5c1<>3, r5c1<>9
15. 2-String Kite: 7 in r6c3,r9c7 (connected by r4c7,r6c8) => r9c3<>7
16. Locked Candidates Type 2 (Claiming): 7 in c3 => r4c2<>7
17. XY-Wing: 6/9/7 in r2c69,r3c4 => r3c9<>7
18. Row 3 / Column 9 → 3 (Naked Single)
19. XY-Chain: 7 7- r2c9 -6- r5c9 -4- r5c1 -8- r6c2 -4- r7c2 -7 => r2c2<>7
20. AIC: 7 7- r7c2 -4- r6c2 =4= r6c7 =2= r4c7 =7= r9c7 -7 => r7c8,r9c12<>7
21. Locked Pair: 1,4 in r78c8 => r19c8,r9c7<>1
22. Continuous Nice Loop: 3/6/7/9 3= r1c2 =1= r1c7 =4= r1c9 =7= r2c9 =6= r2c6 -6- r6c6 -3- r6c8 =3= r4c8 -3- r4c2 =3= r1c2 =1 => r46c3<>3, r1c9,r5c6<>6, r1c2<>7, r1c27<>9
23. Skyscraper: 6 in r5c9,r6c6 (connected by r2c69) => r5c4,r6c8<>6
24. X-Wing: 6 c48 r14 => r4c23<>6
25. Row 9 / Column 2 → 6 (Hidden Single)
26. Sue de Coq: r4c78 - {23679} (r4c23 - {379}, r5c9,r6c7 - {246}) => r5c7<>4
27. Row 5 / Column 7 → 9 (Naked Single)
28. XY-Chain: 7 7- r1c9 -4- r1c7 -1- r2c7 -8- r3c8 -9- r3c4 -7 => r1c4<>7
29. Row 3 / Column 4 → 7 (Hidden Single)
30. Row 7 / Column 2 → 7 (Hidden Single)
31. Row 6 / Column 2 → 4 (Hidden Single)
32. Row 5 / Column 1 → 8 (Naked Single)
33. Row 6 / Column 7 → 2 (Naked Single)
34. Row 5 / Column 4 → 1 (Naked Single)
35. Row 4 / Column 7 → 7 (Naked Single)
36. Row 6 / Column 4 → 8 (Naked Single)
37. Row 5 / Column 6 → 3 (Naked Single)
38. Row 8 / Column 4 → 9 (Naked Single)
39. Row 4 / Column 3 → 9 (Naked Single)
40. Row 6 / Column 8 → 3 (Naked Single)
41. Row 9 / Column 7 → 8 (Naked Single)
42. Row 5 / Column 3 → 6 (Naked Single)
43. Row 5 / Column 9 → 4 (Full House)
44. Row 4 / Column 8 → 6 (Full House)
45. Row 6 / Column 6 → 6 (Naked Single)
46. Row 6 / Column 3 → 7 (Full House)
47. Row 4 / Column 2 → 3 (Full House)
48. Row 4 / Column 4 → 2 (Full House)
49. Row 1 / Column 4 → 6 (Full House)
50. Row 2 / Column 6 → 9 (Full House)
51. Row 9 / Column 3 → 1 (Naked Single)
52. Row 8 / Column 3 → 3 (Full House)
53. Row 2 / Column 7 → 1 (Naked Single)
54. Row 1 / Column 7 → 4 (Full House)
55. Row 9 / Column 8 → 7 (Naked Single)
56. Row 1 / Column 9 → 7 (Naked Single)
57. Row 2 / Column 9 → 6 (Full House)
58. Row 1 / Column 8 → 9 (Naked Single)
59. Row 3 / Column 8 → 8 (Full House)
60. Row 3 / Column 2 → 9 (Full House)
61. Row 1 / Column 2 → 1 (Naked Single)
62. Row 2 / Column 2 → 8 (Full House)
63. Row 2 / Column 1 → 7 (Full House)
64. Row 1 / Column 1 → 3 (Full House)
65. Row 9 / Column 6 → 2 (Naked Single)
66. Row 7 / Column 6 → 1 (Full House)
67. Row 9 / Column 1 → 9 (Full House)
68. Row 8 / Column 1 → 4 (Naked Single)
69. Row 7 / Column 1 → 2 (Full House)
70. Row 7 / Column 8 → 4 (Full House)
71. Row 8 / Column 8 → 1 (Full House)