Solution for Evil Sudoku #1174713524895

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

This Sudoku Puzzle has 61 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Pair, Full House, Naked Single techniques.

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Solution Steps:

  1. Row 6 / Column 2 → 7 (Hidden Single)
  2. Row 3 / Column 5 → 4 (Hidden Single)
  3. Row 9 / Column 5 → 1 (Hidden Single)
  4. Row 2 / Column 8 → 7 (Hidden Single)
  5. Row 8 / Column 3 → 4 (Hidden Single)
  6. Row 9 / Column 7 → 4 (Hidden Single)
  7. Row 3 / Column 8 → 8 (Hidden Single)
  8. Row 1 / Column 1 → 4 (Hidden Single)
  9. Row 1 / Column 3 → 8 (Hidden Single)
  10. Row 5 / Column 1 → 8 (Hidden Single)
  11. Row 6 / Column 9 → 8 (Hidden Single)
  12. Row 2 / Column 1 → 2 (Hidden Single)
  13. Row 6 / Column 7 → 2 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 5 in b1 => r78c2<>5
  15. Locked Candidates Type 1 (Pointing): 6 in b1 => r78c2<>6
  16. Locked Pair: 3,9 in r78c2 => r123c2,r7c13,r9c13<>9
  17. Row 4 / Column 1 → 9 (Hidden Single)
  18. Locked Candidates Type 1 (Pointing): 2 in b3 => r89c9<>2
  19. Locked Candidates Type 1 (Pointing): 5 in b4 => r79c3<>5
  20. Locked Pair: 2,6 in r79c3 => r456c3,r79c1<>6
  21. Row 7 / Column 1 → 5 (Full House)
  22. Row 9 / Column 1 → 5 (Full House)
  23. Row 5 / Column 3 → 5 (Naked Single)
  24. Row 6 / Column 3 → 1 (Full House)
  25. Row 4 / Column 3 → 1 (Full House)
  26. Row 4 / Column 6 → 6 (Naked Single)
  27. Row 6 / Column 4 → 9 (Full House)
  28. Row 6 / Column 6 → 9 (Full House)
  29. Row 4 / Column 4 → 3 (Naked Single)
  30. Row 4 / Column 8 → 3 (Naked Single)
  31. Row 5 / Column 5 → 3 (Naked Single)
  32. Row 4 / Column 7 → 5 (Naked Single)
  33. Row 7 / Column 4 → 6 (Naked Single)
  34. Row 7 / Column 3 → 2 (Naked Single)
  35. Row 7 / Column 5 → 9 (Naked Single)
  36. Row 7 / Column 8 → 9 (Naked Single)
  37. Row 9 / Column 3 → 6 (Naked Single)
  38. Row 2 / Column 5 → 6 (Naked Single)
  39. Row 7 / Column 2 → 3 (Naked Single)
  40. Row 8 / Column 5 → 2 (Naked Single)
  41. Row 9 / Column 8 → 2 (Naked Single)
  42. Row 9 / Column 9 → 3 (Naked Single)
  43. Row 1 / Column 5 → 2 (Naked Single)
  44. Row 8 / Column 2 → 9 (Naked Single)
  45. Row 8 / Column 8 → 6 (Naked Single)
  46. Row 3 / Column 6 → 5 (Naked Single)
  47. Row 8 / Column 9 → 5 (Naked Single)
  48. Row 2 / Column 4 → 8 (Full House)
  49. Row 8 / Column 6 → 8 (Full House)
  50. Row 8 / Column 4 → 8 (Full House)
  51. Row 2 / Column 6 → 8 (Naked Single)
  52. Row 3 / Column 2 → 6 (Naked Single)
  53. Row 1 / Column 2 → 1 (Naked Single)
  54. Row 2 / Column 2 → 5 (Full House)
  55. Row 3 / Column 7 → 3 (Hidden Single)
  56. Row 2 / Column 7 → 9 (Hidden Single)
  57. Row 1 / Column 7 → 6 (Full House)
  58. Row 3 / Column 9 → 2 (Full House)
  59. Row 1 / Column 9 → 6 (Full House)
  60. Row 5 / Column 7 → 6 (Full House)
  61. Row 5 / Column 9 → 9 (Naked Single)
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