Solution for Evil Sudoku #2178439612542

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

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