Solution for Evil Sudoku #1247713524895

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

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, Hidden Pair, Full House techniques.

Naked Single Explanation
Hidden Single Explanation
Hidden Pair Explanation
Locked Candidates Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 4 → 7 (Hidden Single)
  2. Row 5 / Column 1 → 1 (Hidden Single)
  3. Row 3 / Column 3 → 4 (Hidden Single)
  4. Row 8 / Column 8 → 7 (Hidden Single)
  5. Row 5 / Column 9 → 7 (Hidden Single)
  6. Row 8 / Column 7 → 8 (Hidden Single)
  7. Locked Candidates Type 1 (Pointing): 1 in b2 => r3c9<>1
  8. Locked Candidates Type 1 (Pointing): 8 in b6 => r1c8<>8
  9. Locked Candidates Type 2 (Claiming): 2 in r8 => r79c1,r9c2<>2
  10. Locked Candidates Type 2 (Claiming): 3 in c1 => r8c23,r9c2<>3
  11. Naked Triple: 3,6,9 in r4c46,r5c5 => r6c46<>6, r6c46<>9
  12. Row 6 / Column 4 → 1 (Naked Single)
  13. Row 6 / Column 6 → 1 (Naked Single)
  14. Hidden Pair: 1,3 in r4c6,r5c5 => r4c6,r5c5<>6, r4c6,r5c5<>9
  15. Row 4 / Column 6 → 3 (Naked Single)
  16. Row 5 / Column 5 → 3 (Naked Single)
  17. Row 4 / Column 4 → 6 (Hidden Single)
  18. Row 8 / Column 1 → 3 (Hidden Single)
  19. Row 2 / Column 2 → 3 (Hidden Single)
  20. Row 7 / Column 7 → 3 (Hidden Single)
  21. Locked Candidates Type 2 (Claiming): 2 in c1 => r1c3,r3c2<>2
  22. Naked Triple: 5,6,9 in r12c3,r3c2 => r13c1<>5, r13c1<>6, r13c1<>9
  23. Row 1 / Column 1 → 2 (Naked Single)
  24. Row 3 / Column 1 → 2 (Naked Single)
  25. Locked Candidates Type 2 (Claiming): 5 in c1 => r9c2<>5
  26. Locked Candidates Type 2 (Claiming): 6 in c1 => r8c23,r9c2<>6
  27. Row 9 / Column 2 → 9 (Naked Single)
  28. Row 8 / Column 2 → 2 (Naked Single)
  29. Row 8 / Column 3 → 2 (Naked Single)
  30. Row 5 / Column 2 → 6 (Naked Single)
  31. Row 3 / Column 2 → 5 (Naked Single)
  32. Row 4 / Column 2 → 8 (Full House)
  33. Row 6 / Column 2 → 8 (Full House)
  34. Row 5 / Column 3 → 9 (Naked Single)
  35. Row 1 / Column 3 → 6 (Naked Single)
  36. Row 2 / Column 3 → 6 (Naked Single)
  37. Row 4 / Column 3 → 5 (Naked Single)
  38. Row 4 / Column 8 → 9 (Full House)
  39. Row 5 / Column 7 → 2 (Naked Single)
  40. Row 5 / Column 8 → 2 (Naked Single)
  41. Row 1 / Column 8 → 5 (Naked Single)
  42. Row 9 / Column 7 → 6 (Naked Single)
  43. Row 1 / Column 6 → 9 (Naked Single)
  44. Row 1 / Column 5 → 8 (Full House)
  45. Row 1 / Column 9 → 8 (Full House)
  46. Row 2 / Column 7 → 9 (Naked Single)
  47. Row 6 / Column 7 → 5 (Full House)
  48. Row 2 / Column 8 → 1 (Naked Single)
  49. Row 6 / Column 8 → 6 (Naked Single)
  50. Row 7 / Column 8 → 1 (Naked Single)
  51. Row 9 / Column 1 → 5 (Naked Single)
  52. Row 9 / Column 9 → 2 (Naked Single)
  53. Row 3 / Column 4 → 8 (Naked Single)
  54. Row 3 / Column 6 → 6 (Naked Single)
  55. Row 8 / Column 6 → 6 (Naked Single)
  56. Row 3 / Column 5 → 6 (Naked Single)
  57. Row 9 / Column 5 → 5 (Naked Single)
  58. Row 2 / Column 9 → 1 (Naked Single)
  59. Row 3 / Column 9 → 6 (Naked Single)
  60. Row 7 / Column 1 → 6 (Naked Single)
  61. Row 7 / Column 9 → 9 (Naked Single)
  62. Row 9 / Column 4 → 8 (Naked Single)
  63. Row 7 / Column 6 → 5 (Naked Single)
  64. Row 7 / Column 5 → 9 (Naked Single)
  65. Row 7 / Column 4 → 2 (Naked Single)
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