Solution for Evil Sudoku #1129713524895

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

This Sudoku Puzzle has 64 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 techniques.

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Solution Steps:

  1. Row 9 / Column 5 → 1 (Hidden Single)
  2. Row 9 / Column 7 → 4 (Hidden Single)
  3. Locked Candidates Type 1 (Pointing): 4 in b1 => r1c5<>4
  4. Locked Candidates Type 1 (Pointing): 8 in b6 => r13c9<>8
  5. Locked Candidates Type 1 (Pointing): 5 in b9 => r5c9<>5
  6. Locked Candidates Type 1 (Pointing): 9 in b9 => r23c8<>9
  7. Locked Candidates Type 2 (Claiming): 8 in r1 => r2c1<>8
  8. Locked Candidates Type 2 (Claiming): 3 in r9 => r78c8,r8c9<>3
  9. Hidden Pair: 4,8 in r1c13 => r1c13<>6, r1c13<>9, r1c3<>1
  10. Locked Candidates Type 1 (Pointing): 1 in b1 => r6c2<>1
  11. Naked Quadruple: 3,4,6,9 in r3578c5 => r12c5<>6, r12c5<>9
  12. Row 1 / Column 5 → 7 (Naked Single)
  13. Row 2 / Column 5 → 7 (Naked Single)
  14. Row 1 / Column 9 → 6 (Naked Single)
  15. Row 3 / Column 9 → 3 (Naked Single)
  16. Row 3 / Column 7 → 9 (Naked Single)
  17. Row 3 / Column 8 → 8 (Naked Single)
  18. Row 5 / Column 9 → 8 (Naked Single)
  19. Row 9 / Column 9 → 5 (Naked Single)
  20. Row 1 / Column 7 → 1 (Naked Single)
  21. Row 2 / Column 8 → 2 (Full House)
  22. Row 2 / Column 7 → 2 (Full House)
  23. Row 8 / Column 9 → 2 (Naked Single)
  24. Row 6 / Column 9 → 7 (Full House)
  25. Row 1 / Column 2 → 9 (Naked Single)
  26. Row 7 / Column 8 → 6 (Naked Single)
  27. Row 6 / Column 7 → 6 (Naked Single)
  28. Row 6 / Column 2 → 6 (Naked Single)
  29. Row 4 / Column 8 → 3 (Naked Single)
  30. Row 8 / Column 8 → 9 (Full House)
  31. Row 4 / Column 7 → 5 (Full House)
  32. Row 5 / Column 7 → 5 (Full House)
  33. Row 9 / Column 8 → 9 (Full House)
  34. Row 6 / Column 4 → 9 (Naked Single)
  35. Row 6 / Column 6 → 1 (Naked Single)
  36. Row 3 / Column 2 → 5 (Naked Single)
  37. Row 4 / Column 1 → 7 (Naked Single)
  38. Row 4 / Column 3 → 1 (Naked Single)
  39. Row 5 / Column 1 → 9 (Naked Single)
  40. Row 5 / Column 3 → 9 (Naked Single)
  41. Row 9 / Column 1 → 6 (Naked Single)
  42. Row 9 / Column 3 → 6 (Naked Single)
  43. Row 6 / Column 3 → 8 (Naked Single)
  44. Row 2 / Column 1 → 6 (Naked Single)
  45. Row 2 / Column 2 → 1 (Naked Single)
  46. Row 8 / Column 2 → 3 (Naked Single)
  47. Row 1 / Column 3 → 4 (Naked Single)
  48. Row 1 / Column 1 → 8 (Full House)
  49. Row 7 / Column 2 → 7 (Naked Single)
  50. Row 8 / Column 3 → 5 (Naked Single)
  51. Row 7 / Column 1 → 4 (Naked Single)
  52. Row 7 / Column 3 → 2 (Naked Single)
  53. Row 7 / Column 5 → 3 (Naked Single)
  54. Row 7 / Column 4 → 5 (Full House)
  55. Row 5 / Column 5 → 6 (Naked Single)
  56. Row 4 / Column 4 → 4 (Full House)
  57. Row 4 / Column 6 → 4 (Full House)
  58. Row 2 / Column 4 → 8 (Naked Single)
  59. Row 8 / Column 4 → 6 (Full House)
  60. Row 3 / Column 5 → 4 (Naked Single)
  61. Row 3 / Column 6 → 6 (Full House)
  62. Row 8 / Column 5 → 4 (Naked Single)
  63. Row 2 / Column 6 → 5 (Naked Single)
  64. Row 8 / Column 6 → 8 (Naked Single)
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