Solution for Evil Sudoku #1218243569775

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

This Sudoku Puzzle has 62 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 9 / Column 6 → 3 (Naked Single)
  2. Row 8 / Column 6 → 1 (Naked Single)
  3. Row 3 / Column 6 → 7 (Naked Single)
  4. Row 3 / Column 5 → 1 (Naked Single)
  5. Row 1 / Column 5 → 2 (Hidden Single)
  6. Row 4 / Column 5 → 3 (Naked Single)
  7. Row 4 / Column 4 → 1 (Naked Single)
  8. Row 6 / Column 4 → 8 (Naked Single)
  9. Row 6 / Column 5 → 7 (Naked Single)
  10. Row 7 / Column 4 → 6 (Naked Single)
  11. Locked Candidates Type 1 (Pointing): 1 in b3 => r2c12<>1
  12. Locked Candidates Type 1 (Pointing): 4 in b3 => r4789c8<>4
  13. Row 4 / Column 9 → 4 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 2 in b7 => r256c2<>2
  15. Locked Candidates Type 1 (Pointing): 7 in b7 => r8c89<>7
  16. Row 8 / Column 9 → 9 (Naked Single)
  17. Row 8 / Column 3 → 7 (Naked Single)
  18. Row 8 / Column 1 → 4 (Naked Single)
  19. Row 7 / Column 2 → 2 (Naked Single)
  20. Row 9 / Column 2 → 9 (Full House)
  21. Row 7 / Column 8 → 7 (Naked Single)
  22. Row 2 / Column 1 → 7 (Hidden Single)
  23. Row 5 / Column 9 → 7 (Hidden Single)
  24. Row 2 / Column 3 → 2 (Hidden Single)
  25. Naked Pair: 3,9 in r1c34 => r1c18<>9, r1c2<>3
  26. Naked Pair: 2,5 in r6c69 => r6c1<>2, r6c127<>5
  27. Row 6 / Column 1 → 9 (Naked Single)
  28. Row 3 / Column 1 → 8 (Naked Single)
  29. Row 4 / Column 3 → 6 (Naked Single)
  30. Row 3 / Column 3 → 9 (Naked Single)
  31. Row 6 / Column 2 → 3 (Naked Single)
  32. Row 1 / Column 3 → 3 (Naked Single)
  33. Row 5 / Column 3 → 8 (Full House)
  34. Row 3 / Column 8 → 4 (Naked Single)
  35. Row 3 / Column 2 → 6 (Full House)
  36. Row 2 / Column 2 → 5 (Naked Single)
  37. Row 6 / Column 7 → 6 (Naked Single)
  38. Row 1 / Column 4 → 9 (Naked Single)
  39. Row 2 / Column 4 → 3 (Full House)
  40. Row 1 / Column 8 → 5 (Naked Single)
  41. Row 1 / Column 1 → 1 (Naked Single)
  42. Row 1 / Column 2 → 4 (Full House)
  43. Row 5 / Column 2 → 1 (Full House)
  44. Row 2 / Column 9 → 1 (Naked Single)
  45. Row 2 / Column 7 → 9 (Full House)
  46. Row 8 / Column 7 → 3 (Naked Single)
  47. Row 8 / Column 8 → 6 (Full House)
  48. Row 9 / Column 8 → 2 (Naked Single)
  49. Row 7 / Column 9 → 8 (Naked Single)
  50. Row 5 / Column 7 → 5 (Naked Single)
  51. Row 4 / Column 8 → 9 (Naked Single)
  52. Row 5 / Column 8 → 3 (Full House)
  53. Row 5 / Column 1 → 2 (Full House)
  54. Row 6 / Column 9 → 2 (Full House)
  55. Row 9 / Column 9 → 5 (Full House)
  56. Row 4 / Column 1 → 5 (Full House)
  57. Row 6 / Column 6 → 5 (Full House)
  58. Row 4 / Column 6 → 2 (Full House)
  59. Row 7 / Column 5 → 4 (Naked Single)
  60. Row 7 / Column 7 → 1 (Full House)
  61. Row 9 / Column 7 → 4 (Full House)
  62. Row 9 / Column 5 → 8 (Full House)
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