Solution for Evil Sudoku #1125461783941

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

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 5 / Column 7 → 4 (Naked Single)
  2. Row 5 / Column 2 → 6 (Naked Single)
  3. Row 5 / Column 3 → 8 (Naked Single)
  4. Row 5 / Column 8 → 3 (Full House)
  5. Row 3 / Column 9 → 3 (Hidden Single)
  6. Row 6 / Column 6 → 3 (Hidden Single)
  7. Row 9 / Column 1 → 3 (Hidden Single)
  8. Row 9 / Column 2 → 2 (Hidden Single)
  9. Locked Candidates Type 1 (Pointing): 4 in b3 => r2c13<>4
  10. Locked Candidates Type 1 (Pointing): 2 in b4 => r6c4<>2
  11. Locked Candidates Type 1 (Pointing): 5 in b7 => r8c49<>5
  12. Locked Candidates Type 2 (Claiming): 9 in r9 => r7c89,r8c79<>9
  13. Naked Triple: 1,8,9 in r368c4 => r2c4<>1, r24c4<>8, r27c4<>9
  14. Hidden Pair: 5,6 in r1c5,r2c4 => r1c5<>1, r1c5<>7
  15. 2-String Kite: 9 in r3c4,r7c1 (connected by r7c6,r8c4) => r3c1<>9
  16. Locked Candidates Type 2 (Claiming): 9 in r3 => r2c6<>9
  17. XY-Wing: 7/8/9 in r4c7,r69c8 => r9c7<>9
  18. Row 9 / Column 7 → 1 (Naked Single)
  19. XY-Chain: 9 9- r2c3 -5- r2c4 -6- r1c5 -5- r9c5 -8- r9c8 -9 => r2c8<>9
  20. AIC: 9 9- r2c3 -5- r2c4 =5= r7c4 =2= r7c6 =9= r7c1 -9 => r12c1,r8c3<>9
  21. Locked Pair: 4,5 in r8c23 => r78c1,r8c9<>4
  22. Continuous Nice Loop: 1/7/8/9 4= r2c9 =1= r2c6 -1- r8c6 =1= r8c4 -1- r6c4 -8- r6c8 =8= r9c8 =9= r9c9 =5= r7c9 =4= r2c9 =1 => r3c46<>1, r27c9<>7, r6c5,r9c9<>8, r2c9<>9
  23. Skyscraper: 8 in r6c4,r9c5 (connected by r69c8) => r4c5,r8c4<>8
  24. X-Wing: 8 r48 c69 => r23c6<>8
  25. Row 2 / Column 1 → 8 (Hidden Single)
  26. Sue de Coq: r78c6 - {12789} (r23c6 - {179}, r7c4,r9c5 - {258}) => r7c5<>5
  27. Row 7 / Column 5 → 7 (Naked Single)
  28. XY-Chain: 6 6- r1c5 -5- r9c5 -8- r9c8 -9- r9c9 -5- r7c9 -4- r7c8 -6 => r1c8<>6
  29. Row 1 / Column 5 → 6 (Hidden Single)
  30. Row 2 / Column 4 → 5 (Naked Single)
  31. Row 4 / Column 5 → 4 (Naked Single)
  32. Row 2 / Column 3 → 9 (Naked Single)
  33. Row 7 / Column 4 → 2 (Naked Single)
  34. Row 4 / Column 2 → 7 (Naked Single)
  35. Row 6 / Column 5 → 1 (Naked Single)
  36. Row 4 / Column 4 → 6 (Naked Single)
  37. Row 7 / Column 6 → 9 (Naked Single)
  38. Row 4 / Column 7 → 9 (Naked Single)
  39. Row 3 / Column 5 → 8 (Naked Single)
  40. Row 9 / Column 5 → 5 (Full House)
  41. Row 6 / Column 4 → 8 (Naked Single)
  42. Row 4 / Column 6 → 2 (Full House)
  43. Row 4 / Column 9 → 8 (Full House)
  44. Row 6 / Column 8 → 7 (Full House)
  45. Row 3 / Column 6 → 7 (Naked Single)
  46. Row 7 / Column 1 → 6 (Naked Single)
  47. Row 8 / Column 4 → 1 (Naked Single)
  48. Row 3 / Column 4 → 9 (Full House)
  49. Row 2 / Column 6 → 1 (Full House)
  50. Row 8 / Column 6 → 8 (Full House)
  51. Row 9 / Column 9 → 9 (Naked Single)
  52. Row 9 / Column 8 → 8 (Full House)
  53. Row 8 / Column 9 → 7 (Naked Single)
  54. Row 1 / Column 8 → 9 (Naked Single)
  55. Row 3 / Column 1 → 4 (Naked Single)
  56. Row 3 / Column 2 → 1 (Full House)
  57. Row 7 / Column 8 → 4 (Naked Single)
  58. Row 2 / Column 8 → 6 (Full House)
  59. Row 7 / Column 9 → 5 (Full House)
  60. Row 8 / Column 7 → 6 (Full House)
  61. Row 2 / Column 7 → 7 (Full House)
  62. Row 2 / Column 9 → 4 (Full House)
  63. Row 1 / Column 9 → 1 (Full House)
  64. Row 8 / Column 1 → 9 (Naked Single)
  65. Row 6 / Column 1 → 2 (Naked Single)
  66. Row 1 / Column 1 → 7 (Full House)
  67. Row 6 / Column 3 → 4 (Full House)
  68. Row 1 / Column 2 → 5 (Naked Single)
  69. Row 1 / Column 3 → 2 (Full House)
  70. Row 8 / Column 3 → 5 (Full House)
  71. Row 8 / Column 2 → 4 (Full House)
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