Solution for Evil Sudoku #1326713524895

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

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

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Solution Steps:

  1. Row 1 / Column 5 → 1 (Hidden Single)
  2. Row 1 / Column 3 → 4 (Hidden Single)
  3. Locked Candidates Type 1 (Pointing): 5 in b1 => r5c1<>5
  4. Locked Candidates Type 1 (Pointing): 6 in b1 => r78c2<>6
  5. Locked Candidates Type 1 (Pointing): 8 in b4 => r79c1<>8
  6. Locked Candidates Type 1 (Pointing): 4 in b9 => r9c5<>4
  7. Locked Candidates Type 2 (Claiming): 3 in r1 => r2c12,r3c2<>3
  8. Locked Candidates Type 2 (Claiming): 8 in r9 => r8c9<>8
  9. Hidden Pair: 4,8 in r9c79 => r9c7<>1, r9c79<>6, r9c79<>9
  10. Locked Candidates Type 1 (Pointing): 1 in b9 => r4c8<>1
  11. Naked Quadruple: 3,4,6,9 in r2357c5 => r89c5<>6, r89c5<>9
  12. Row 8 / Column 5 → 7 (Naked Single)
  13. Row 9 / Column 5 → 7 (Naked Single)
  14. Row 9 / Column 1 → 9 (Naked Single)
  15. Row 7 / Column 1 → 3 (Naked Single)
  16. Row 1 / Column 1 → 5 (Naked Single)
  17. Row 5 / Column 1 → 8 (Naked Single)
  18. Row 7 / Column 2 → 8 (Naked Single)
  19. Row 7 / Column 3 → 6 (Naked Single)
  20. Row 2 / Column 1 → 2 (Naked Single)
  21. Row 4 / Column 1 → 7 (Full House)
  22. Row 8 / Column 2 → 2 (Naked Single)
  23. Row 9 / Column 3 → 1 (Full House)
  24. Row 8 / Column 3 → 1 (Full House)
  25. Row 3 / Column 2 → 9 (Naked Single)
  26. Row 9 / Column 8 → 6 (Naked Single)
  27. Row 2 / Column 2 → 6 (Naked Single)
  28. Row 6 / Column 2 → 3 (Full House)
  29. Row 1 / Column 2 → 3 (Full House)
  30. Row 4 / Column 8 → 9 (Naked Single)
  31. Row 4 / Column 3 → 2 (Naked Single)
  32. Row 4 / Column 4 → 1 (Naked Single)
  33. Row 4 / Column 6 → 6 (Naked Single)
  34. Row 4 / Column 7 → 8 (Full House)
  35. Row 7 / Column 8 → 5 (Naked Single)
  36. Row 8 / Column 8 → 5 (Naked Single)
  37. Row 9 / Column 7 → 4 (Naked Single)
  38. Row 2 / Column 8 → 3 (Naked Single)
  39. Row 8 / Column 9 → 9 (Naked Single)
  40. Row 9 / Column 9 → 8 (Naked Single)
  41. Row 3 / Column 8 → 7 (Naked Single)
  42. Row 1 / Column 9 → 6 (Naked Single)
  43. Row 8 / Column 4 → 8 (Naked Single)
  44. Row 8 / Column 6 → 8 (Naked Single)
  45. Row 1 / Column 7 → 9 (Naked Single)
  46. Row 5 / Column 9 → 5 (Naked Single)
  47. Row 2 / Column 7 → 5 (Naked Single)
  48. Row 3 / Column 9 → 4 (Naked Single)
  49. Row 6 / Column 9 → 7 (Full House)
  50. Row 3 / Column 7 → 2 (Full House)
  51. Row 5 / Column 3 → 9 (Naked Single)
  52. Row 6 / Column 3 → 5 (Full House)
  53. Row 5 / Column 7 → 6 (Naked Single)
  54. Row 6 / Column 7 → 1 (Full House)
  55. Row 5 / Column 5 → 3 (Full House)
  56. Row 3 / Column 5 → 3 (Naked Single)
  57. Row 3 / Column 6 → 5 (Naked Single)
  58. Naked Pair: 4,9 in r2c45 => r2c6<>4, r2c6<>9
  59. Row 2 / Column 6 → 9 (Naked Single)
  60. Row 2 / Column 4 → 4 (Naked Single)
  61. Row 6 / Column 4 → 9 (Full House)
  62. Row 6 / Column 6 → 4 (Full House)
  63. Row 7 / Column 4 → 9 (Full House)
  64. Row 2 / Column 5 → 4 (Naked Single)
  65. Row 7 / Column 5 → 4 (Naked Single)
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