Solution for Evil Sudoku #1356713524895

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

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

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Solution Steps:

  1. Row 1 / Column 5 → 1 (Hidden Single)
  2. Row 1 / Column 3 → 4 (Hidden Single)
  3. Row 2 / Column 1 → 5 (Hidden Single)
  4. Row 3 / Column 8 → 5 (Hidden Single)
  5. Row 2 / Column 8 → 3 (Hidden Single)
  6. Row 3 / Column 9 → 7 (Hidden Single)
  7. Row 6 / Column 9 → 9 (Naked Single)
  8. Row 4 / Column 8 → 7 (Hidden Single)
  9. Row 6 / Column 2 → 7 (Hidden Single)
  10. Row 9 / Column 9 → 4 (Hidden Single)
  11. Row 9 / Column 1 → 7 (Hidden Single)
  12. Row 8 / Column 5 → 7 (Hidden Single)
  13. Row 9 / Column 7 → 8 (Hidden Single)
  14. Row 4 / Column 1 → 8 (Hidden Single)
  15. Row 5 / Column 9 → 8 (Hidden Single)
  16. Row 8 / Column 9 → 2 (Hidden Single)
  17. Row 1 / Column 9 → 6 (Full House)
  18. Row 4 / Column 3 → 2 (Hidden Single)
  19. Row 2 / Column 2 → 6 (Hidden Single)
  20. Row 9 / Column 5 → 2 (Hidden Single)
  21. Row 2 / Column 4 → 2 (Hidden Single)
  22. Row 2 / Column 6 → 8 (Hidden Single)
  23. Locked Candidates Type 1 (Pointing): 3 in b2 => r3c2<>3
  24. Locked Candidates Type 1 (Pointing): 9 in b4 => r5c5<>9
  25. Naked Pair: 8,9 in r8c24 => r8c368<>9
  26. Row 8 / Column 6 → 6 (Naked Single)
  27. Row 4 / Column 6 → 9 (Naked Single)
  28. Row 8 / Column 3 → 1 (Naked Single)
  29. Row 8 / Column 8 → 1 (Naked Single)
  30. Row 4 / Column 4 → 1 (Naked Single)
  31. Row 4 / Column 7 → 6 (Full House)
  32. Row 6 / Column 4 → 4 (Naked Single)
  33. Row 5 / Column 7 → 5 (Naked Single)
  34. Row 6 / Column 7 → 1 (Full House)
  35. Row 6 / Column 6 → 3 (Naked Single)
  36. Row 3 / Column 6 → 4 (Full House)
  37. Row 5 / Column 5 → 6 (Full House)
  38. Row 6 / Column 3 → 5 (Full House)
  39. Row 2 / Column 5 → 9 (Naked Single)
  40. Row 2 / Column 7 → 4 (Full House)
  41. Row 3 / Column 5 → 3 (Full House)
  42. Row 7 / Column 5 → 4 (Full House)
  43. Uniqueness Test 1: 2/9 in r1c27,r3c27 => r1c2<>2, r1c2<>9
  44. Row 1 / Column 2 → 3 (Naked Single)
  45. Uniqueness Test 1: 8/9 in r7c24,r8c24 => r7c2<>8, r7c2<>9
  46. Row 7 / Column 2 → 2 (Naked Single)
  47. Row 3 / Column 2 → 9 (Naked Single)
  48. Row 1 / Column 1 → 2 (Full House)
  49. Row 3 / Column 7 → 2 (Full House)
  50. Row 8 / Column 2 → 8 (Full House)
  51. Row 1 / Column 7 → 9 (Full House)
  52. Row 8 / Column 4 → 9 (Naked Single)
  53. Row 7 / Column 4 → 8 (Full House)
  54. Bivalue Universal Grave + 1 => r7c3<>3, r7c3<>6
  55. Row 7 / Column 3 → 9 (Naked Single)
  56. Row 5 / Column 3 → 3 (Naked Single)
  57. Row 9 / Column 3 → 6 (Full House)
  58. Row 7 / Column 1 → 3 (Full House)
  59. Row 7 / Column 8 → 6 (Full House)
  60. Row 5 / Column 1 → 9 (Full House)
  61. Row 9 / Column 8 → 9 (Full House)
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