Solution for Evil Sudoku #2184169357242

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

This Sudoku Puzzle has 60 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, undefined, Swordfish, Naked Single, Empty Rectangle, Full House techniques.

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

Solution Steps:

  1. Row 3 / Column 2 → 9 (Hidden Single)
  2. Row 6 / Column 4 → 1 (Hidden Single)
  3. Row 4 / Column 1 → 1 (Hidden Single)
  4. Row 7 / Column 5 → 9 (Hidden Single)
  5. Row 4 / Column 6 → 9 (Hidden Single)
  6. Row 8 / Column 8 → 4 (Hidden Single)
  7. Row 2 / Column 5 → 6 (Hidden Single)
  8. Row 7 / Column 7 → 6 (Hidden Single)
  9. Row 6 / Column 9 → 6 (Hidden Single)
  10. Row 7 / Column 3 → 7 (Hidden Single)
  11. Row 3 / Column 9 → 1 (Hidden Single)
  12. Row 2 / Column 2 → 1 (Hidden Single)
  13. Row 4 / Column 3 → 2 (Hidden Single)
  14. Row 6 / Column 5 → 7 (Hidden Single)
  15. Row 5 / Column 9 → 7 (Hidden Single)
  16. Row 9 / Column 8 → 1 (Hidden Single)
  17. Row 4 / Column 7 → 4 (Hidden Single)
  18. Locked Candidates Type 1 (Pointing): 5 in b2 => r8c6<>5
  19. Locked Candidates Type 1 (Pointing): 4 in b5 => r5c1<>4
  20. Locked Candidates Type 1 (Pointing): 3 in b8 => r8c2<>3
  21. Naked Pair: 2,8 in r3c57 => r3c6<>8
  22. X-Wing: 2 r27 c14 => r1c1,r89c4<>2
  23. Swordfish: 3 c237 r169 => r1c18,r6c1<>3
  24. Row 1 / Column 1 → 5 (Naked Single)
  25. Row 3 / Column 3 → 4 (Naked Single)
  26. Row 3 / Column 6 → 5 (Naked Single)
  27. Row 6 / Column 1 → 4 (Hidden Single)
  28. Naked Pair: 7,8 in r1c68 => r1c7<>8
  29. Empty Rectangle: 8 in b6 (r3c57) => r4c5<>8
  30. Row 4 / Column 5 → 3 (Naked Single)
  31. Row 2 / Column 8 → 3 (Hidden Single)
  32. Row 1 / Column 7 → 2 (Naked Single)
  33. Row 2 / Column 1 → 2 (Naked Single)
  34. Row 1 / Column 2 → 3 (Full House)
  35. Row 3 / Column 7 → 8 (Naked Single)
  36. Row 1 / Column 8 → 7 (Full House)
  37. Row 3 / Column 5 → 2 (Full House)
  38. Row 6 / Column 7 → 3 (Full House)
  39. Row 1 / Column 6 → 8 (Full House)
  40. Row 8 / Column 5 → 8 (Full House)
  41. Row 7 / Column 1 → 8 (Naked Single)
  42. Row 5 / Column 1 → 3 (Full House)
  43. Row 6 / Column 3 → 5 (Naked Single)
  44. Row 6 / Column 2 → 8 (Full House)
  45. Row 9 / Column 3 → 3 (Full House)
  46. Row 5 / Column 6 → 4 (Naked Single)
  47. Row 5 / Column 4 → 8 (Full House)
  48. Row 9 / Column 4 → 5 (Naked Single)
  49. Row 7 / Column 8 → 5 (Naked Single)
  50. Row 7 / Column 4 → 2 (Full House)
  51. Row 4 / Column 8 → 8 (Full House)
  52. Row 4 / Column 9 → 5 (Full House)
  53. Row 2 / Column 6 → 7 (Naked Single)
  54. Row 2 / Column 4 → 4 (Full House)
  55. Row 8 / Column 4 → 7 (Full House)
  56. Row 8 / Column 6 → 3 (Full House)
  57. Row 9 / Column 2 → 2 (Naked Single)
  58. Row 8 / Column 2 → 5 (Full House)
  59. Row 8 / Column 9 → 2 (Full House)
  60. Row 9 / Column 9 → 8 (Full House)
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