Solution for Evil Sudoku #1376713524895

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

This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Naked Single, Full House, Naked Pair techniques.

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Solution Steps:

  1. Row 1 / Column 5 → 1 (Hidden Single)
  2. Row 3 / Column 8 → 7 (Hidden Single)
  3. Row 6 / Column 2 → 7 (Hidden Single)
  4. Row 1 / Column 3 → 4 (Hidden Single)
  5. Row 2 / Column 8 → 3 (Hidden Single)
  6. Locked Candidates Type 1 (Pointing): 5 in b1 => r5c1<>5
  7. Locked Candidates Type 1 (Pointing): 6 in b1 => r78c2<>6
  8. Locked Candidates Type 1 (Pointing): 3 in b2 => r3c2<>3
  9. Locked Candidates Type 1 (Pointing): 8 in b4 => r79c1<>8
  10. Locked Candidates Type 1 (Pointing): 4 in b9 => r9c5<>4
  11. Locked Candidates Type 2 (Claiming): 8 in r9 => r8c9<>8
  12. Locked Candidates Type 2 (Claiming): 5 in c8 => r8c9<>5
  13. Naked Triple: 1,6,9 in r4c468 => r4c137<>9, r4c7<>1, r4c7<>6
  14. Row 4 / Column 3 → 2 (Naked Single)
  15. Row 4 / Column 7 → 8 (Naked Single)
  16. Row 4 / Column 1 → 8 (Naked Single)
  17. Row 9 / Column 9 → 8 (Hidden Single)
  18. Row 9 / Column 7 → 4 (Hidden Single)
  19. Row 3 / Column 9 → 4 (Hidden Single)
  20. Row 6 / Column 7 → 1 (Hidden Single)
  21. Row 8 / Column 9 → 2 (Hidden Single)
  22. Row 4 / Column 4 → 1 (Hidden Single)
  23. Locked Candidates Type 1 (Pointing): 6 in b9 => r4c8<>6
  24. Row 4 / Column 8 → 9 (Naked Single)
  25. Row 4 / Column 6 → 6 (Naked Single)
  26. Row 6 / Column 9 → 5 (Naked Single)
  27. Row 5 / Column 7 → 6 (Full House)
  28. Row 5 / Column 9 → 6 (Full House)
  29. Row 1 / Column 9 → 9 (Naked Single)
  30. Row 5 / Column 3 → 5 (Hidden Single)
  31. Row 2 / Column 2 → 6 (Hidden Single)
  32. Naked Pair: 2,5 in r12c7 => r3c7<>2, r3c7<>5
  33. Row 3 / Column 7 → 5 (Naked Single)
  34. Row 1 / Column 7 → 2 (Naked Single)
  35. Row 2 / Column 7 → 2 (Naked Single)
  36. Row 1 / Column 2 → 3 (Naked Single)
  37. Row 1 / Column 1 → 5 (Full House)
  38. Row 2 / Column 1 → 9 (Naked Single)
  39. Row 3 / Column 2 → 2 (Full House)
  40. Row 2 / Column 5 → 4 (Naked Single)
  41. Row 5 / Column 1 → 3 (Naked Single)
  42. Row 9 / Column 1 → 2 (Naked Single)
  43. Row 5 / Column 5 → 9 (Naked Single)
  44. Row 6 / Column 3 → 9 (Naked Single)
  45. Row 7 / Column 1 → 2 (Naked Single)
  46. Row 3 / Column 5 → 3 (Naked Single)
  47. Row 8 / Column 5 → 6 (Full House)
  48. Row 9 / Column 5 → 6 (Full House)
  49. Row 7 / Column 5 → 6 (Full House)
  50. Row 6 / Column 4 → 4 (Naked Single)
  51. Row 6 / Column 6 → 3 (Full House)
  52. Row 3 / Column 6 → 9 (Naked Single)
  53. Row 8 / Column 3 → 1 (Naked Single)
  54. Row 9 / Column 3 → 1 (Naked Single)
  55. Row 9 / Column 8 → 1 (Naked Single)
  56. Row 7 / Column 3 → 3 (Naked Single)
  57. Row 7 / Column 8 → 5 (Naked Single)
  58. Row 8 / Column 8 → 5 (Naked Single)
  59. Row 8 / Column 6 → 8 (Naked Single)
  60. Row 2 / Column 6 → 5 (Full House)
  61. Row 2 / Column 4 → 8 (Full House)
  62. Row 7 / Column 4 → 9 (Full House)
  63. Row 8 / Column 4 → 9 (Full House)
  64. Row 8 / Column 2 → 9 (Naked Single)
  65. Row 7 / Column 2 → 8 (Naked Single)
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