Solution for Evil Sudoku #4165873412996

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

This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Locked Pair, Naked Single, Locked Candidates Type 1 (Pointing), Full House techniques.

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Solution Steps:

  1. Row 4 / Column 8 → 6 (Hidden Single)
  2. Row 1 / Column 6 → 5 (Hidden Single)
  3. Row 2 / Column 3 → 1 (Hidden Single)
  4. Row 8 / Column 9 → 4 (Hidden Single)
  5. Row 2 / Column 5 → 2 (Hidden Single)
  6. Row 8 / Column 5 → 6 (Hidden Single)
  7. Row 9 / Column 4 → 8 (Hidden Single)
  8. Row 7 / Column 6 → 1 (Hidden Single)
  9. Row 8 / Column 7 → 7 (Hidden Single)
  10. Row 9 / Column 6 → 2 (Hidden Single)
  11. Row 8 / Column 8 → 5 (Hidden Single)
  12. Row 6 / Column 5 → 5 (Hidden Single)
  13. Row 5 / Column 7 → 5 (Hidden Single)
  14. Locked Pair: 2,9 in r1c78 => r1c19,r3c79<>2, r1c13<>9
  15. Row 1 / Column 9 → 7 (Naked Single)
  16. Locked Candidates Type 1 (Pointing): 3 in b3 => r3c4<>3
  17. Locked Candidates Type 1 (Pointing): 4 in b5 => r4c1<>4
  18. Locked Candidates Type 1 (Pointing): 9 in b5 => r6c23<>9
  19. Locked Pair: 2,7 in r46c2 => r239c2,r4c1,r6c3<>7, r3c2,r4c1<>2
  20. Row 2 / Column 2 → 9 (Naked Single)
  21. Row 3 / Column 1 → 2 (Hidden Single)
  22. Row 3 / Column 2 → 5 (Hidden Single)
  23. Row 9 / Column 2 → 6 (Naked Single)
  24. Row 9 / Column 9 → 3 (Naked Single)
  25. Row 3 / Column 9 → 1 (Naked Single)
  26. Row 5 / Column 9 → 8 (Naked Single)
  27. Row 9 / Column 7 → 9 (Naked Single)
  28. Row 3 / Column 7 → 3 (Naked Single)
  29. Row 5 / Column 5 → 3 (Naked Single)
  30. Row 4 / Column 5 → 8 (Full House)
  31. Row 6 / Column 9 → 2 (Naked Single)
  32. Row 7 / Column 9 → 6 (Full House)
  33. Row 1 / Column 7 → 2 (Naked Single)
  34. Row 1 / Column 8 → 9 (Full House)
  35. Row 7 / Column 8 → 2 (Naked Single)
  36. Row 6 / Column 8 → 3 (Full House)
  37. Row 4 / Column 7 → 1 (Full House)
  38. Row 7 / Column 7 → 8 (Full House)
  39. Row 9 / Column 3 → 7 (Naked Single)
  40. Row 9 / Column 1 → 5 (Full House)
  41. Row 4 / Column 1 → 3 (Naked Single)
  42. Row 6 / Column 2 → 7 (Naked Single)
  43. Row 4 / Column 2 → 2 (Full House)
  44. Row 6 / Column 3 → 8 (Naked Single)
  45. Row 3 / Column 3 → 6 (Naked Single)
  46. Row 3 / Column 4 → 7 (Full House)
  47. Row 7 / Column 1 → 9 (Naked Single)
  48. Row 7 / Column 3 → 3 (Full House)
  49. Row 6 / Column 6 → 9 (Naked Single)
  50. Row 6 / Column 4 → 1 (Full House)
  51. Row 1 / Column 3 → 4 (Naked Single)
  52. Row 5 / Column 3 → 9 (Full House)
  53. Row 5 / Column 1 → 4 (Full House)
  54. Row 4 / Column 4 → 4 (Naked Single)
  55. Row 4 / Column 6 → 7 (Full House)
  56. Row 8 / Column 6 → 3 (Naked Single)
  57. Row 2 / Column 6 → 4 (Full House)
  58. Row 8 / Column 4 → 9 (Full House)
  59. Row 1 / Column 1 → 8 (Naked Single)
  60. Row 1 / Column 4 → 6 (Full House)
  61. Row 2 / Column 1 → 7 (Full House)
  62. Row 2 / Column 4 → 3 (Full House)
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