Solution for Evil Sudoku #4357489216375

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

This Sudoku Puzzle has 61 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Full House, Naked Pair techniques.

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Solution Steps:

  1. Row 4 / Column 9 → 9 (Naked Single)
  2. Row 4 / Column 8 → 5 (Naked Single)
  3. Row 4 / Column 3 → 3 (Naked Single)
  4. Row 5 / Column 3 → 5 (Naked Single)
  5. Row 5 / Column 1 → 4 (Hidden Single)
  6. Row 5 / Column 4 → 9 (Naked Single)
  7. Row 6 / Column 4 → 5 (Naked Single)
  8. Row 6 / Column 6 → 7 (Naked Single)
  9. Row 5 / Column 6 → 3 (Naked Single)
  10. Row 6 / Column 7 → 1 (Naked Single)
  11. Locked Candidates Type 1 (Pointing): 5 in b1 => r89c2<>5
  12. Locked Candidates Type 1 (Pointing): 8 in b1 => r2c4789<>8
  13. Row 1 / Column 4 → 8 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 3 in b9 => r12c8<>3
  15. Row 1 / Column 8 → 6 (Naked Single)
  16. Row 7 / Column 8 → 3 (Naked Single)
  17. Row 9 / Column 8 → 8 (Naked Single)
  18. Row 8 / Column 7 → 4 (Naked Single)
  19. Row 8 / Column 9 → 6 (Full House)
  20. Row 2 / Column 7 → 3 (Naked Single)
  21. Row 9 / Column 2 → 3 (Hidden Single)
  22. Row 1 / Column 5 → 3 (Hidden Single)
  23. Row 7 / Column 2 → 4 (Hidden Single)
  24. Naked Pair: 6,9 in r67c1 => r29c1<>6, r8c1<>9
  25. Naked Pair: 2,4 in r14c6 => r389c6<>2, r9c6<>4
  26. Row 9 / Column 6 → 6 (Naked Single)
  27. Row 7 / Column 4 → 1 (Naked Single)
  28. Row 9 / Column 3 → 7 (Naked Single)
  29. Row 8 / Column 6 → 9 (Naked Single)
  30. Row 7 / Column 3 → 6 (Naked Single)
  31. Row 3 / Column 6 → 1 (Naked Single)
  32. Row 7 / Column 5 → 7 (Naked Single)
  33. Row 7 / Column 1 → 9 (Full House)
  34. Row 8 / Column 2 → 2 (Naked Single)
  35. Row 2 / Column 3 → 8 (Naked Single)
  36. Row 8 / Column 3 → 1 (Full House)
  37. Row 3 / Column 8 → 9 (Naked Single)
  38. Row 2 / Column 8 → 1 (Full House)
  39. Row 6 / Column 1 → 6 (Naked Single)
  40. Row 6 / Column 2 → 9 (Full House)
  41. Row 1 / Column 2 → 5 (Naked Single)
  42. Row 3 / Column 2 → 6 (Full House)
  43. Row 2 / Column 1 → 2 (Full House)
  44. Row 8 / Column 5 → 5 (Naked Single)
  45. Row 8 / Column 1 → 8 (Full House)
  46. Row 9 / Column 1 → 5 (Full House)
  47. Row 3 / Column 5 → 2 (Naked Single)
  48. Row 1 / Column 7 → 7 (Naked Single)
  49. Row 2 / Column 9 → 4 (Naked Single)
  50. Row 1 / Column 6 → 4 (Naked Single)
  51. Row 1 / Column 9 → 2 (Full House)
  52. Row 4 / Column 6 → 2 (Full House)
  53. Row 4 / Column 4 → 4 (Full House)
  54. Row 3 / Column 9 → 8 (Naked Single)
  55. Row 3 / Column 7 → 5 (Full House)
  56. Row 5 / Column 7 → 8 (Full House)
  57. Row 5 / Column 9 → 7 (Full House)
  58. Row 9 / Column 5 → 4 (Naked Single)
  59. Row 2 / Column 5 → 9 (Full House)
  60. Row 2 / Column 4 → 6 (Full House)
  61. Row 9 / Column 4 → 2 (Full House)
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