Solution for Evil Sudoku #2443971256843

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

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

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Solution Steps:

  1. Row 4 / Column 2 → 1 (Naked Single)
  2. Row 4 / Column 3 → 5 (Naked Single)
  3. Row 2 / Column 5 → 5 (Hidden Single)
  4. Row 4 / Column 8 → 7 (Hidden Single)
  5. Row 6 / Column 5 → 8 (Hidden Single)
  6. Row 2 / Column 8 → 1 (Hidden Single)
  7. Row 1 / Column 6 → 7 (Hidden Single)
  8. Row 9 / Column 4 → 7 (Hidden Single)
  9. Row 6 / Column 7 → 4 (Hidden Single)
  10. Row 6 / Column 6 → 3 (Naked Single)
  11. Row 5 / Column 6 → 1 (Naked Single)
  12. Row 7 / Column 6 → 4 (Full House)
  13. Row 6 / Column 2 → 2 (Naked Single)
  14. Row 6 / Column 8 → 9 (Full House)
  15. Row 3 / Column 1 → 1 (Hidden Single)
  16. Row 7 / Column 5 → 1 (Hidden Single)
  17. Row 8 / Column 9 → 7 (Hidden Single)
  18. Row 5 / Column 4 → 9 (Hidden Single)
  19. Row 3 / Column 7 → 7 (Hidden Single)
  20. Row 3 / Column 3 → 2 (Hidden Single)
  21. Row 8 / Column 1 → 5 (Hidden Single)
  22. Row 7 / Column 9 → 5 (Hidden Single)
  23. Row 8 / Column 2 → 4 (Hidden Single)
  24. Locked Candidates Type 1 (Pointing): 9 in b3 => r9c9<>9
  25. X-Wing: 3 c38 r17 => r1c159,r7c1<>3
  26. Row 3 / Column 5 → 3 (Hidden Single)
  27. X-Wing: 8 c38 r18 => r1c1<>8
  28. Naked Pair: 4,6 in r1c15 => r1c89<>6, r1c9<>4
  29. Row 1 / Column 9 → 9 (Naked Single)
  30. Row 3 / Column 2 → 9 (Hidden Single)
  31. Empty Rectangle: 6 in b3 (r29c2) => r9c9<>6
  32. XY-Wing: 2/8/3 in r18c8,r9c9 => r2c9,r7c8<>3
  33. Row 9 / Column 9 → 3 (Hidden Single)
  34. Row 1 / Column 8 → 3 (Hidden Single)
  35. Row 1 / Column 3 → 8 (Naked Single)
  36. Row 8 / Column 3 → 9 (Naked Single)
  37. Row 7 / Column 3 → 3 (Full House)
  38. Row 8 / Column 5 → 2 (Naked Single)
  39. Row 8 / Column 8 → 8 (Full House)
  40. Row 9 / Column 5 → 9 (Full House)
  41. Row 9 / Column 7 → 6 (Naked Single)
  42. Row 2 / Column 7 → 8 (Naked Single)
  43. Row 7 / Column 7 → 9 (Full House)
  44. Row 7 / Column 8 → 2 (Full House)
  45. Row 5 / Column 8 → 6 (Full House)
  46. Row 7 / Column 1 → 6 (Full House)
  47. Row 5 / Column 9 → 2 (Full House)
  48. Row 9 / Column 2 → 8 (Naked Single)
  49. Row 9 / Column 1 → 2 (Full House)
  50. Row 1 / Column 1 → 4 (Naked Single)
  51. Row 1 / Column 5 → 6 (Full House)
  52. Row 3 / Column 4 → 4 (Full House)
  53. Row 4 / Column 5 → 4 (Full House)
  54. Row 3 / Column 9 → 6 (Full House)
  55. Row 4 / Column 4 → 6 (Full House)
  56. Row 2 / Column 9 → 4 (Full House)
  57. Row 5 / Column 2 → 3 (Naked Single)
  58. Row 2 / Column 2 → 6 (Full House)
  59. Row 2 / Column 1 → 3 (Full House)
  60. Row 5 / Column 1 → 8 (Full House)
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