Solution for Evil Sudoku #3173485169296

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

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 2 → 7 (Hidden Single)
  2. Row 1 / Column 4 → 3 (Hidden Single)
  3. Row 2 / Column 7 → 6 (Hidden Single)
  4. Row 7 / Column 4 → 6 (Hidden Single)
  5. Row 8 / Column 1 → 1 (Hidden Single)
  6. Row 9 / Column 6 → 4 (Hidden Single)
  7. Row 8 / Column 5 → 7 (Hidden Single)
  8. Row 2 / Column 5 → 9 (Hidden Single)
  9. Row 9 / Column 4 → 9 (Hidden Single)
  10. Row 8 / Column 3 → 8 (Hidden Single)
  11. Row 8 / Column 2 → 3 (Hidden Single)
  12. Row 6 / Column 5 → 3 (Hidden Single)
  13. Row 5 / Column 3 → 3 (Hidden Single)
  14. Locked Pair: 2,9 in r1c23 => r1c19,r3c13<>9, r1c79<>2
  15. Row 1 / Column 1 → 8 (Naked Single)
  16. Locked Candidates Type 1 (Pointing): 5 in b1 => r3c6<>5
  17. Locked Candidates Type 1 (Pointing): 1 in b5 => r4c9<>1
  18. Locked Candidates Type 1 (Pointing): 2 in b5 => r6c78<>2
  19. Locked Pair: 8,9 in r46c8 => r239c8,r4c9,r6c7<>8, r3c8,r4c9<>9
  20. Row 2 / Column 8 → 2 (Naked Single)
  21. Row 3 / Column 9 → 9 (Hidden Single)
  22. Row 3 / Column 8 → 3 (Hidden Single)
  23. Row 9 / Column 8 → 7 (Naked Single)
  24. Row 9 / Column 1 → 5 (Naked Single)
  25. Row 3 / Column 1 → 6 (Naked Single)
  26. Row 5 / Column 1 → 4 (Naked Single)
  27. Row 9 / Column 3 → 2 (Naked Single)
  28. Row 3 / Column 3 → 5 (Naked Single)
  29. Row 5 / Column 5 → 5 (Naked Single)
  30. Row 4 / Column 5 → 4 (Full House)
  31. Row 6 / Column 1 → 9 (Naked Single)
  32. Row 7 / Column 1 → 7 (Full House)
  33. Row 1 / Column 3 → 9 (Naked Single)
  34. Row 1 / Column 2 → 2 (Full House)
  35. Row 7 / Column 2 → 9 (Naked Single)
  36. Row 6 / Column 2 → 5 (Full House)
  37. Row 4 / Column 3 → 6 (Full House)
  38. Row 7 / Column 3 → 4 (Full House)
  39. Row 9 / Column 7 → 8 (Naked Single)
  40. Row 9 / Column 9 → 3 (Full House)
  41. Row 4 / Column 9 → 5 (Naked Single)
  42. Row 6 / Column 8 → 8 (Naked Single)
  43. Row 4 / Column 8 → 9 (Full House)
  44. Row 6 / Column 7 → 4 (Naked Single)
  45. Row 3 / Column 7 → 7 (Naked Single)
  46. Row 3 / Column 6 → 8 (Full House)
  47. Row 7 / Column 9 → 2 (Naked Single)
  48. Row 7 / Column 7 → 5 (Full House)
  49. Row 6 / Column 4 → 2 (Naked Single)
  50. Row 6 / Column 6 → 6 (Full House)
  51. Row 1 / Column 7 → 1 (Naked Single)
  52. Row 5 / Column 7 → 2 (Full House)
  53. Row 5 / Column 9 → 1 (Full House)
  54. Row 4 / Column 6 → 1 (Naked Single)
  55. Row 4 / Column 4 → 8 (Full House)
  56. Row 8 / Column 4 → 5 (Naked Single)
  57. Row 2 / Column 4 → 1 (Full House)
  58. Row 8 / Column 6 → 2 (Full House)
  59. Row 1 / Column 6 → 7 (Naked Single)
  60. Row 1 / Column 9 → 4 (Full House)
  61. Row 2 / Column 9 → 8 (Full House)
  62. Row 2 / Column 6 → 5 (Full House)
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