Solution for Evil Sudoku #3139842671542

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

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 3 → 4 (Hidden Single)
  2. Row 4 / Column 1 → 4 (Hidden Single)
  3. Row 3 / Column 7 → 1 (Hidden Single)
  4. Row 8 / Column 5 → 4 (Hidden Single)
  5. Row 2 / Column 2 → 9 (Hidden Single)
  6. Row 6 / Column 9 → 8 (Hidden Single)
  7. Row 4 / Column 6 → 8 (Hidden Single)
  8. Row 3 / Column 5 → 2 (Hidden Single)
  9. Row 7 / Column 8 → 2 (Hidden Single)
  10. Row 6 / Column 4 → 2 (Hidden Single)
  11. Row 5 / Column 1 → 1 (Hidden Single)
  12. Row 6 / Column 7 → 5 (Hidden Single)
  13. Row 4 / Column 5 → 1 (Hidden Single)
  14. Row 7 / Column 1 → 8 (Hidden Single)
  15. Row 8 / Column 8 → 8 (Hidden Single)
  16. Row 6 / Column 3 → 9 (Hidden Single)
  17. Row 1 / Column 2 → 8 (Hidden Single)
  18. Locked Candidates Type 1 (Pointing): 6 in b2 => r2c8<>6
  19. Locked Candidates Type 1 (Pointing): 9 in b5 => r5c9<>9
  20. Locked Candidates Type 1 (Pointing): 7 in b8 => r2c4<>7
  21. Naked Pair: 3,5 in r7c35 => r7c4<>3
  22. X-Wing: 5 r38 c69 => r12c6,r9c9<>5
  23. Swordfish: 6 c378 r149 => r49c9,r9c2<>6
  24. Row 9 / Column 9 → 7 (Naked Single)
  25. Row 7 / Column 7 → 9 (Naked Single)
  26. Row 7 / Column 4 → 7 (Naked Single)
  27. Row 4 / Column 9 → 9 (Hidden Single)
  28. Naked Pair: 1,3 in r9c24 => r9c3<>3
  29. Empty Rectangle: 3 in b4 (r7c35) => r6c5<>3
  30. Row 6 / Column 5 → 6 (Naked Single)
  31. Row 2 / Column 4 → 6 (Hidden Single)
  32. Row 5 / Column 9 → 6 (Hidden Single)
  33. Row 4 / Column 7 → 7 (Naked Single)
  34. Row 1 / Column 7 → 6 (Full House)
  35. Row 4 / Column 8 → 3 (Full House)
  36. Row 4 / Column 3 → 6 (Full House)
  37. Row 8 / Column 9 → 5 (Naked Single)
  38. Row 3 / Column 9 → 3 (Full House)
  39. Row 9 / Column 8 → 6 (Full House)
  40. Row 9 / Column 3 → 5 (Naked Single)
  41. Row 7 / Column 3 → 3 (Full House)
  42. Row 7 / Column 5 → 5 (Full House)
  43. Row 2 / Column 5 → 3 (Full House)
  44. Row 3 / Column 2 → 7 (Naked Single)
  45. Row 3 / Column 6 → 5 (Full House)
  46. Row 9 / Column 2 → 1 (Naked Single)
  47. Row 8 / Column 2 → 6 (Full House)
  48. Row 6 / Column 2 → 3 (Full House)
  49. Row 9 / Column 4 → 3 (Full House)
  50. Row 6 / Column 1 → 7 (Full House)
  51. Row 1 / Column 6 → 7 (Naked Single)
  52. Row 2 / Column 6 → 1 (Full House)
  53. Row 2 / Column 1 → 5 (Naked Single)
  54. Row 1 / Column 1 → 3 (Full House)
  55. Row 1 / Column 8 → 5 (Full House)
  56. Row 2 / Column 8 → 7 (Full House)
  57. Row 5 / Column 4 → 9 (Naked Single)
  58. Row 5 / Column 6 → 3 (Full House)
  59. Row 8 / Column 6 → 9 (Full House)
  60. Row 8 / Column 4 → 1 (Full House)
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