Solution for Evil Sudoku #1427185693475

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

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.

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 1 / Column 4 → 5 (Naked Single)
  2. Row 2 / Column 4 → 2 (Naked Single)
  3. Row 7 / Column 4 → 4 (Naked Single)
  4. Row 7 / Column 5 → 2 (Naked Single)
  5. Row 3 / Column 6 → 9 (Hidden Single)
  6. Row 9 / Column 5 → 1 (Hidden Single)
  7. Row 6 / Column 5 → 5 (Naked Single)
  8. Row 4 / Column 6 → 7 (Naked Single)
  9. Row 6 / Column 6 → 2 (Naked Single)
  10. Row 4 / Column 5 → 4 (Naked Single)
  11. Locked Candidates Type 1 (Pointing): 1 in b3 => r458c8<>1
  12. Locked Candidates Type 1 (Pointing): 4 in b3 => r2c12<>4
  13. Locked Candidates Type 1 (Pointing): 2 in b7 => r8c89<>2
  14. Locked Candidates Type 1 (Pointing): 8 in b7 => r1236c2<>8
  15. Row 6 / Column 1 → 8 (Hidden Single)
  16. Row 2 / Column 1 → 3 (Naked Single)
  17. Row 2 / Column 7 → 4 (Naked Single)
  18. Row 2 / Column 9 → 8 (Naked Single)
  19. Row 3 / Column 8 → 1 (Naked Single)
  20. Row 1 / Column 8 → 3 (Full House)
  21. Row 3 / Column 2 → 4 (Naked Single)
  22. Row 8 / Column 9 → 4 (Hidden Single)
  23. Row 5 / Column 1 → 4 (Hidden Single)
  24. Row 8 / Column 7 → 1 (Hidden Single)
  25. Naked Pair: 1,6 in r4c14 => r4c389<>6, r4c9<>1
  26. Row 4 / Column 9 → 3 (Naked Single)
  27. Row 6 / Column 7 → 9 (Naked Single)
  28. Row 7 / Column 9 → 7 (Naked Single)
  29. Row 4 / Column 8 → 5 (Naked Single)
  30. Row 7 / Column 7 → 3 (Naked Single)
  31. Row 4 / Column 3 → 9 (Naked Single)
  32. Row 5 / Column 7 → 7 (Naked Single)
  33. Row 9 / Column 7 → 5 (Full House)
  34. Row 8 / Column 8 → 6 (Naked Single)
  35. Row 7 / Column 2 → 8 (Naked Single)
  36. Row 7 / Column 8 → 9 (Full House)
  37. Row 2 / Column 3 → 5 (Naked Single)
  38. Row 2 / Column 2 → 9 (Full House)
  39. Row 9 / Column 6 → 3 (Naked Single)
  40. Row 8 / Column 6 → 5 (Full House)
  41. Row 5 / Column 8 → 2 (Naked Single)
  42. Row 9 / Column 8 → 8 (Full House)
  43. Row 9 / Column 9 → 2 (Full House)
  44. Row 9 / Column 2 → 6 (Full House)
  45. Row 8 / Column 1 → 2 (Naked Single)
  46. Row 8 / Column 3 → 3 (Full House)
  47. Row 5 / Column 3 → 6 (Naked Single)
  48. Row 1 / Column 2 → 1 (Naked Single)
  49. Row 3 / Column 1 → 7 (Naked Single)
  50. Row 1 / Column 3 → 8 (Naked Single)
  51. Row 3 / Column 3 → 2 (Full House)
  52. Row 1 / Column 1 → 6 (Full House)
  53. Row 4 / Column 1 → 1 (Full House)
  54. Row 3 / Column 5 → 8 (Full House)
  55. Row 1 / Column 5 → 7 (Full House)
  56. Row 4 / Column 4 → 6 (Full House)
  57. Row 6 / Column 4 → 1 (Full House)
  58. Row 5 / Column 9 → 1 (Naked Single)
  59. Row 5 / Column 2 → 5 (Full House)
  60. Row 6 / Column 2 → 3 (Full House)
  61. Row 6 / Column 9 → 6 (Full House)
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