Solution for Evil Sudoku #4256839217495

7
2
6
3
7
3
4
8
9
5
3
8
4
2
1
6
5
8
9
8
5
1
7
9
4
3

This Sudoku Puzzle has 62 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Pair, Locked Triple, Locked Candidates Type 1 (Pointing) techniques.

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

Solution Steps:

  1. Row 4 / Column 6 → 3 (Naked Single)
  2. Row 6 / Column 6 → 6 (Naked Single)
  3. Row 4 / Column 4 → 7 (Naked Single)
  4. Row 6 / Column 4 → 9 (Naked Single)
  5. Row 5 / Column 5 → 5 (Full House)
  6. Row 3 / Column 9 → 7 (Hidden Single)
  7. Row 5 / Column 9 → 3 (Hidden Single)
  8. Row 7 / Column 4 → 3 (Hidden Single)
  9. Row 5 / Column 3 → 7 (Hidden Single)
  10. Locked Pair: 1,9 in r5c78 => r4c8,r5c12<>1
  11. Locked Triple: 2,3,6 in r8c123 => r8c78,r9c2<>2, r79c1,r8c8,r9c2<>6
  12. Locked Candidates Type 1 (Pointing): 4 in b2 => r1c13<>4
  13. Locked Candidates Type 1 (Pointing): 2 in b3 => r1c5<>2
  14. Locked Candidates Type 1 (Pointing): 6 in b3 => r2c23<>6
  15. Locked Candidates Type 1 (Pointing): 5 in b8 => r13c6<>5
  16. Row 3 / Column 6 → 1 (Naked Single)
  17. Row 1 / Column 8 → 5 (Hidden Single)
  18. Row 8 / Column 8 → 9 (Naked Single)
  19. Row 5 / Column 8 → 1 (Naked Single)
  20. Row 2 / Column 8 → 6 (Naked Single)
  21. Row 5 / Column 7 → 9 (Naked Single)
  22. Row 2 / Column 7 → 1 (Naked Single)
  23. Row 2 / Column 9 → 9 (Naked Single)
  24. Row 1 / Column 9 → 2 (Full House)
  25. Row 2 / Column 3 → 4 (Naked Single)
  26. Locked Candidates Type 1 (Pointing): 4 in b4 => r9c2<>4
  27. Row 9 / Column 2 → 1 (Naked Single)
  28. Row 9 / Column 9 → 6 (Naked Single)
  29. Row 7 / Column 9 → 1 (Full House)
  30. Row 4 / Column 3 → 1 (Hidden Single)
  31. Row 1 / Column 3 → 9 (Naked Single)
  32. Row 1 / Column 5 → 4 (Naked Single)
  33. Row 3 / Column 3 → 6 (Naked Single)
  34. Row 8 / Column 3 → 2 (Full House)
  35. Row 1 / Column 6 → 8 (Naked Single)
  36. Row 1 / Column 1 → 1 (Full House)
  37. Row 9 / Column 5 → 2 (Naked Single)
  38. Row 3 / Column 1 → 3 (Naked Single)
  39. Row 2 / Column 4 → 5 (Naked Single)
  40. Row 2 / Column 2 → 8 (Full House)
  41. Row 3 / Column 2 → 5 (Full House)
  42. Row 8 / Column 6 → 5 (Naked Single)
  43. Row 7 / Column 6 → 4 (Full House)
  44. Row 3 / Column 5 → 9 (Naked Single)
  45. Row 7 / Column 5 → 6 (Full House)
  46. Row 9 / Column 4 → 8 (Full House)
  47. Row 3 / Column 4 → 2 (Full House)
  48. Row 8 / Column 1 → 6 (Naked Single)
  49. Row 5 / Column 2 → 6 (Naked Single)
  50. Row 5 / Column 1 → 8 (Full House)
  51. Row 8 / Column 7 → 8 (Naked Single)
  52. Row 8 / Column 2 → 3 (Full House)
  53. Row 7 / Column 1 → 7 (Naked Single)
  54. Row 9 / Column 1 → 4 (Full House)
  55. Row 9 / Column 7 → 7 (Full House)
  56. Row 7 / Column 8 → 2 (Naked Single)
  57. Row 7 / Column 7 → 5 (Full House)
  58. Row 6 / Column 7 → 2 (Full House)
  59. Row 4 / Column 8 → 4 (Naked Single)
  60. Row 4 / Column 2 → 2 (Full House)
  61. Row 6 / Column 2 → 4 (Full House)
  62. Row 6 / Column 8 → 7 (Full House)
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