Solution for Evil Sudoku #1243713524895

1
8
3
4
2
4
7
3
7
4
3
2
5
8
7
1
4
3
7
8
1
4
1
3
5
4

This Sudoku Puzzle has 61 steps and it is solved using Hidden Single, Locked Pair, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Full House techniques.

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Solution Steps:

  1. Row 2 / Column 2 → 3 (Hidden Single)
  2. Row 5 / Column 5 → 3 (Hidden Single)
  3. Row 5 / Column 1 → 1 (Hidden Single)
  4. Row 3 / Column 3 → 4 (Hidden Single)
  5. Locked Pair: 6,9 in r4c46 => r4c238,r6c46<>6, r4c238,r6c46<>9
  6. Row 4 / Column 3 → 5 (Naked Single)
  7. Row 6 / Column 4 → 1 (Naked Single)
  8. Row 6 / Column 6 → 1 (Naked Single)
  9. Row 4 / Column 2 → 8 (Naked Single)
  10. Row 4 / Column 8 → 8 (Naked Single)
  11. Row 3 / Column 9 → 1 (Hidden Single)
  12. Row 8 / Column 7 → 8 (Hidden Single)
  13. Row 7 / Column 8 → 1 (Hidden Single)
  14. Row 1 / Column 9 → 8 (Hidden Single)
  15. Row 8 / Column 1 → 3 (Hidden Single)
  16. Row 7 / Column 7 → 3 (Hidden Single)
  17. Row 1 / Column 8 → 2 (Hidden Single)
  18. Locked Candidates Type 1 (Pointing): 6 in b3 => r2c34<>6
  19. Locked Candidates Type 1 (Pointing): 9 in b3 => r2c34<>9
  20. Row 2 / Column 3 → 7 (Naked Single)
  21. Row 2 / Column 4 → 7 (Naked Single)
  22. Row 8 / Column 6 → 7 (Hidden Single)
  23. Row 9 / Column 9 → 7 (Hidden Single)
  24. Row 5 / Column 8 → 7 (Hidden Single)
  25. Locked Candidates Type 2 (Claiming): 2 in r8 => r79c1,r9c2<>2
  26. Row 3 / Column 1 → 2 (Hidden Single)
  27. Naked Triple: 5,6,9 in r1c56,r3c6 => r3c45<>6, r3c45<>9, r3c5<>5
  28. Row 3 / Column 4 → 8 (Naked Single)
  29. Row 3 / Column 5 → 8 (Naked Single)
  30. Naked Triple: 5,6,9 in r79c1,r9c2 => r8c23<>6, r8c23<>9
  31. Row 8 / Column 2 → 2 (Naked Single)
  32. Row 8 / Column 3 → 2 (Naked Single)
  33. Row 8 / Column 8 → 6 (Hidden Single)
  34. Row 6 / Column 7 → 2 (Hidden Single)
  35. Row 9 / Column 7 → 9 (Naked Single)
  36. Row 7 / Column 9 → 2 (Full House)
  37. Row 5 / Column 7 → 6 (Naked Single)
  38. Row 2 / Column 7 → 5 (Full House)
  39. Row 5 / Column 2 → 9 (Full House)
  40. Row 5 / Column 3 → 9 (Full House)
  41. Row 5 / Column 9 → 9 (Full House)
  42. Row 2 / Column 8 → 9 (Naked Single)
  43. Row 2 / Column 9 → 6 (Full House)
  44. Row 6 / Column 2 → 6 (Naked Single)
  45. Row 3 / Column 2 → 5 (Full House)
  46. Row 9 / Column 2 → 5 (Full House)
  47. Row 1 / Column 3 → 6 (Naked Single)
  48. Row 1 / Column 1 → 9 (Full House)
  49. Row 9 / Column 1 → 6 (Full House)
  50. Row 1 / Column 5 → 5 (Full House)
  51. Row 1 / Column 6 → 5 (Full House)
  52. Row 7 / Column 1 → 6 (Full House)
  53. Row 6 / Column 8 → 5 (Naked Single)
  54. Row 9 / Column 5 → 6 (Naked Single)
  55. Row 9 / Column 4 → 2 (Naked Single)
  56. Row 7 / Column 4 → 9 (Naked Single)
  57. Row 7 / Column 5 → 9 (Naked Single)
  58. Row 7 / Column 6 → 9 (Naked Single)
  59. Row 4 / Column 4 → 6 (Naked Single)
  60. Row 3 / Column 6 → 6 (Naked Single)
  61. Row 4 / Column 6 → 6 (Naked Single)
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