Solution for Evil Sudoku #1128514376992

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

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

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Solution Steps:

  1. Row 1 / Column 6 → 2 (Hidden Single)
  2. Row 2 / Column 1 → 6 (Hidden Single)
  3. Row 4 / Column 8 → 6 (Hidden Single)
  4. Row 7 / Column 5 → 2 (Hidden Single)
  5. Row 1 / Column 4 → 8 (Hidden Single)
  6. Locked Pair: 4,9 in r78c4 => r269c4,r79c6<>4, r239c4,r79c6<>9
  7. Row 9 / Column 4 → 6 (Naked Single)
  8. Row 6 / Column 6 → 6 (Hidden Single)
  9. Locked Candidates Type 1 (Pointing): 4 in b2 => r2c89<>4
  10. Locked Candidates Type 1 (Pointing): 1 in b5 => r23c6<>1
  11. Locked Candidates Type 1 (Pointing): 2 in b6 => r4c123<>2
  12. Locked Candidates Type 1 (Pointing): 7 in b7 => r46c3<>7
  13. Locked Candidates Type 1 (Pointing): 8 in b8 => r45c6<>8
  14. Locked Candidates Type 2 (Claiming): 1 in r1 => r2c89,r3c9<>1
  15. Locked Pair: 3,5 in r23c9 => r2c8,r3c7,r47c9<>5, r3c7,r79c9<>3
  16. Row 7 / Column 8 → 5 (Hidden Single)
  17. Row 7 / Column 9 → 1 (Hidden Single)
  18. Row 1 / Column 9 → 4 (Naked Single)
  19. Row 1 / Column 8 → 1 (Full House)
  20. Row 4 / Column 9 → 2 (Naked Single)
  21. Row 9 / Column 9 → 8 (Naked Single)
  22. Row 9 / Column 6 → 3 (Naked Single)
  23. Row 7 / Column 6 → 8 (Naked Single)
  24. Locked Candidates Type 1 (Pointing): 4 in b6 => r789c7<>4
  25. Naked Pair: 4,9 in r8c48 => r8c2<>4, r8c27<>9
  26. Locked Candidates Type 1 (Pointing): 4 in b7 => r456c1<>4
  27. Locked Candidates Type 1 (Pointing): 9 in b7 => r45c1<>9
  28. Locked Pair: 1,8 in r45c1 => r3c1,r4c3<>1, r3c1,r4c23,r5c2<>8
  29. Row 3 / Column 1 → 3 (Naked Single)
  30. Row 4 / Column 3 → 5 (Naked Single)
  31. Row 2 / Column 2 → 2 (Naked Single)
  32. Row 3 / Column 2 → 8 (Naked Single)
  33. Row 2 / Column 3 → 1 (Full House)
  34. Row 3 / Column 9 → 5 (Naked Single)
  35. Row 2 / Column 9 → 3 (Full House)
  36. Row 6 / Column 1 → 2 (Naked Single)
  37. Row 4 / Column 7 → 4 (Naked Single)
  38. Row 5 / Column 7 → 5 (Full House)
  39. Row 8 / Column 2 → 3 (Naked Single)
  40. Row 3 / Column 6 → 9 (Naked Single)
  41. Row 6 / Column 3 → 3 (Naked Single)
  42. Row 7 / Column 3 → 7 (Naked Single)
  43. Row 8 / Column 7 → 2 (Naked Single)
  44. Row 3 / Column 7 → 7 (Naked Single)
  45. Row 2 / Column 8 → 9 (Full House)
  46. Row 3 / Column 4 → 1 (Full House)
  47. Row 4 / Column 6 → 1 (Naked Single)
  48. Row 9 / Column 3 → 2 (Naked Single)
  49. Row 8 / Column 3 → 8 (Full House)
  50. Row 9 / Column 7 → 9 (Naked Single)
  51. Row 7 / Column 7 → 3 (Full House)
  52. Row 8 / Column 8 → 4 (Naked Single)
  53. Row 8 / Column 4 → 9 (Full House)
  54. Row 9 / Column 8 → 7 (Full House)
  55. Row 9 / Column 1 → 4 (Full House)
  56. Row 7 / Column 4 → 4 (Full House)
  57. Row 7 / Column 1 → 9 (Full House)
  58. Row 4 / Column 1 → 8 (Naked Single)
  59. Row 5 / Column 1 → 1 (Full House)
  60. Row 5 / Column 6 → 4 (Naked Single)
  61. Row 2 / Column 6 → 5 (Full House)
  62. Row 5 / Column 2 → 9 (Naked Single)
  63. Row 5 / Column 5 → 8 (Full House)
  64. Row 6 / Column 5 → 7 (Naked Single)
  65. Row 2 / Column 4 → 7 (Naked Single)
  66. Row 2 / Column 5 → 4 (Full House)
  67. Row 4 / Column 5 → 9 (Full House)
  68. Row 4 / Column 2 → 7 (Full House)
  69. Row 6 / Column 2 → 4 (Full House)
  70. Row 6 / Column 4 → 5 (Full House)
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