Solution for Evil Sudoku #4215748623996

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

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

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Solution Steps:

  1. Row 5 / Column 8 → 3 (Hidden Single)
  2. Row 4 / Column 1 → 7 (Hidden Single)
  3. Row 5 / Column 2 → 1 (Hidden Single)
  4. Row 6 / Column 3 → 2 (Hidden Single)
  5. Row 9 / Column 2 → 6 (Hidden Single)
  6. Row 8 / Column 6 → 1 (Hidden Single)
  7. Row 6 / Column 9 → 5 (Hidden Single)
  8. Row 3 / Column 8 → 2 (Hidden Single)
  9. Row 6 / Column 1 → 3 (Hidden Single)
  10. Row 7 / Column 2 → 4 (Hidden Single)
  11. Row 8 / Column 2 → 5 (Hidden Single)
  12. Row 7 / Column 5 → 5 (Hidden Single)
  13. Row 5 / Column 4 → 5 (Hidden Single)
  14. Locked Pair: 3,9 in r78c9 => r19c9,r79c7<>3, r13c9<>9
  15. Row 9 / Column 9 → 4 (Naked Single)
  16. Locked Candidates Type 1 (Pointing): 6 in b5 => r1c6<>6
  17. Locked Candidates Type 1 (Pointing): 9 in b5 => r23c4<>9
  18. Locked Pair: 3,4 in r2c46 => r1c6,r2c178,r3c4<>4, r1c6,r2c7<>3
  19. Row 2 / Column 8 → 9 (Naked Single)
  20. Row 1 / Column 7 → 3 (Hidden Single)
  21. Row 1 / Column 1 → 5 (Hidden Single)
  22. Row 2 / Column 1 → 1 (Naked Single)
  23. Row 2 / Column 7 → 5 (Naked Single)
  24. Row 9 / Column 1 → 8 (Naked Single)
  25. Row 7 / Column 1 → 9 (Naked Single)
  26. Row 3 / Column 1 → 4 (Full House)
  27. Row 9 / Column 5 → 7 (Naked Single)
  28. Row 9 / Column 7 → 2 (Naked Single)
  29. Row 7 / Column 9 → 3 (Naked Single)
  30. Row 8 / Column 3 → 3 (Naked Single)
  31. Row 3 / Column 7 → 1 (Naked Single)
  32. Row 5 / Column 5 → 8 (Naked Single)
  33. Row 5 / Column 6 → 7 (Full House)
  34. Row 7 / Column 7 → 8 (Naked Single)
  35. Row 8 / Column 9 → 9 (Full House)
  36. Row 8 / Column 4 → 8 (Full House)
  37. Row 4 / Column 7 → 4 (Full House)
  38. Row 9 / Column 4 → 3 (Naked Single)
  39. Row 9 / Column 3 → 1 (Full House)
  40. Row 7 / Column 3 → 7 (Full House)
  41. Row 7 / Column 6 → 2 (Full House)
  42. Row 1 / Column 6 → 8 (Naked Single)
  43. Row 3 / Column 4 → 7 (Naked Single)
  44. Row 2 / Column 4 → 4 (Naked Single)
  45. Row 2 / Column 6 → 3 (Full House)
  46. Row 4 / Column 6 → 6 (Naked Single)
  47. Row 6 / Column 6 → 4 (Full House)
  48. Row 1 / Column 3 → 9 (Naked Single)
  49. Row 3 / Column 3 → 8 (Full House)
  50. Row 3 / Column 9 → 6 (Naked Single)
  51. Row 3 / Column 5 → 9 (Full House)
  52. Row 1 / Column 5 → 6 (Full House)
  53. Row 6 / Column 4 → 9 (Naked Single)
  54. Row 4 / Column 4 → 2 (Full House)
  55. Row 4 / Column 8 → 8 (Naked Single)
  56. Row 4 / Column 9 → 1 (Naked Single)
  57. Row 1 / Column 9 → 7 (Full House)
  58. Row 1 / Column 8 → 4 (Full House)
  59. Row 4 / Column 2 → 9 (Full House)
  60. Row 6 / Column 2 → 8 (Full House)
  61. Row 6 / Column 8 → 6 (Full House)
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