Solution for Evil Sudoku #1144713524895

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

This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Naked Single, Full House techniques.

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Solution Steps:

  1. Row 9 / Column 5 → 1 (Hidden Single)
  2. Row 8 / Column 3 → 4 (Hidden Single)
  3. Locked Candidates Type 1 (Pointing): 8 in b6 => r13c9<>8
  4. Locked Candidates Type 2 (Claiming): 8 in r1 => r2c1<>8
  5. Locked Candidates Type 2 (Claiming): 3 in r9 => r78c8,r8c9<>3
  6. Naked Triple: 3,6,9 in r46c4,r5c5 => r46c6<>6, r46c6<>9
  7. Row 4 / Column 6 → 1 (Naked Single)
  8. Row 6 / Column 6 → 1 (Naked Single)
  9. Row 1 / Column 3 → 1 (Hidden Single)
  10. Row 2 / Column 7 → 1 (Hidden Single)
  11. Row 1 / Column 1 → 8 (Hidden Single)
  12. Row 2 / Column 1 → 2 (Hidden Single)
  13. Locked Candidates Type 1 (Pointing): 5 in b1 => r78c2<>5
  14. Locked Candidates Type 1 (Pointing): 6 in b1 => r678c2<>6
  15. Locked Candidates Type 1 (Pointing): 9 in b1 => r678c2<>9
  16. Row 6 / Column 2 → 7 (Naked Single)
  17. Row 8 / Column 2 → 3 (Naked Single)
  18. Row 7 / Column 2 → 3 (Naked Single)
  19. Row 4 / Column 8 → 7 (Hidden Single)
  20. Row 7 / Column 1 → 7 (Hidden Single)
  21. Row 1 / Column 9 → 7 (Hidden Single)
  22. Row 4 / Column 4 → 3 (Hidden Single)
  23. Row 2 / Column 5 → 7 (Hidden Single)
  24. Naked Triple: 5,6,9 in r4c13,r5c1 => r5c3<>5, r56c3<>6, r56c3<>9
  25. Row 5 / Column 3 → 8 (Naked Single)
  26. Row 6 / Column 3 → 8 (Naked Single)
  27. Naked Triple: 2,6,9 in r135c5 => r78c5<>2, r78c5<>6, r78c5<>9
  28. Row 7 / Column 5 → 9 (Naked Single)
  29. Row 8 / Column 5 → 9 (Naked Single)
  30. Row 5 / Column 5 → 6 (Naked Single)
  31. Row 1 / Column 5 → 2 (Naked Single)
  32. Row 3 / Column 5 → 2 (Naked Single)
  33. Row 6 / Column 4 → 9 (Naked Single)
  34. Row 8 / Column 6 → 2 (Hidden Single)
  35. Row 8 / Column 8 → 6 (Naked Single)
  36. Row 7 / Column 8 → 2 (Naked Single)
  37. Row 8 / Column 9 → 5 (Naked Single)
  38. Row 8 / Column 4 → 8 (Naked Single)
  39. Row 7 / Column 4 → 6 (Hidden Single)
  40. Row 2 / Column 4 → 5 (Full House)
  41. Row 7 / Column 3 → 5 (Naked Single)
  42. Row 9 / Column 3 → 2 (Hidden Single)
  43. Row 6 / Column 7 → 2 (Hidden Single)
  44. Row 6 / Column 9 → 6 (Naked Single)
  45. Row 3 / Column 2 → 5 (Hidden Single)
  46. Row 9 / Column 1 → 6 (Hidden Single)
  47. Row 4 / Column 3 → 6 (Hidden Single)
  48. Locked Candidates Type 1 (Pointing): 9 in b8 => r13459c7<>9
  49. Row 1 / Column 7 → 6 (Naked Single)
  50. Row 1 / Column 2 → 9 (Full House)
  51. Row 2 / Column 2 → 6 (Full House)
  52. Row 4 / Column 7 → 5 (Naked Single)
  53. Row 9 / Column 7 → 3 (Full House)
  54. Row 3 / Column 7 → 3 (Full House)
  55. Row 4 / Column 1 → 9 (Full House)
  56. Row 5 / Column 7 → 3 (Full House)
  57. Row 9 / Column 8 → 9 (Full House)
  58. Row 9 / Column 9 → 9 (Full House)
  59. Row 3 / Column 9 → 9 (Full House)
  60. Row 5 / Column 1 → 5 (Full House)
  61. Row 5 / Column 9 → 9 (Full House)
  62. Row 2 / Column 8 → 8 (Full House)
  63. Row 3 / Column 8 → 8 (Full House)
  64. Row 2 / Column 6 → 9 (Full House)
  65. Row 3 / Column 6 → 6 (Naked Single)
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