Solution for Evil Sudoku #1278713524895

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

This Sudoku Puzzle has 60 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Pair, Naked Single, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 4 → 7 (Hidden Single)
  2. Row 4 / Column 8 → 8 (Hidden Single)
  3. Row 5 / Column 1 → 1 (Hidden Single)
  4. Row 3 / Column 4 → 8 (Hidden Single)
  5. Row 8 / Column 7 → 8 (Hidden Single)
  6. Row 8 / Column 6 → 7 (Hidden Single)
  7. Row 7 / Column 1 → 4 (Hidden Single)
  8. Row 1 / Column 9 → 8 (Hidden Single)
  9. Row 6 / Column 4 → 1 (Hidden Single)
  10. Row 3 / Column 6 → 1 (Hidden Single)
  11. Row 1 / Column 3 → 4 (Hidden Single)
  12. Row 3 / Column 9 → 4 (Hidden Single)
  13. Row 1 / Column 8 → 2 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 5 in b3 => r2c23<>5
  15. Locked Candidates Type 1 (Pointing): 6 in b3 => r2c23<>6
  16. Locked Pair: 3,9 in r2c23 => r13c1,r2c789,r3c23<>9
  17. Row 3 / Column 5 → 9 (Hidden Single)
  18. Locked Candidates Type 1 (Pointing): 5 in b2 => r1c1<>5
  19. Row 1 / Column 1 → 6 (Naked Single)
  20. Row 1 / Column 5 → 5 (Full House)
  21. Row 1 / Column 6 → 5 (Full House)
  22. Locked Pair: 3,6 in r79c5 => r5c5,r7c6<>3, r5c5,r7c46,r9c4<>6
  23. Row 5 / Column 5 → 6 (Naked Single)
  24. Row 7 / Column 6 → 9 (Naked Single)
  25. Row 4 / Column 4 → 9 (Naked Single)
  26. Row 7 / Column 4 → 2 (Full House)
  27. Row 9 / Column 4 → 2 (Full House)
  28. Row 5 / Column 8 → 9 (Naked Single)
  29. Row 7 / Column 5 → 3 (Naked Single)
  30. Row 9 / Column 5 → 3 (Naked Single)
  31. Row 6 / Column 6 → 4 (Naked Single)
  32. Row 5 / Column 9 → 2 (Naked Single)
  33. Row 8 / Column 8 → 6 (Naked Single)
  34. Row 7 / Column 7 → 6 (Naked Single)
  35. Row 4 / Column 6 → 3 (Naked Single)
  36. Row 5 / Column 3 → 3 (Naked Single)
  37. Row 5 / Column 7 → 4 (Naked Single)
  38. Row 6 / Column 8 → 5 (Full House)
  39. Row 7 / Column 8 → 1 (Full House)
  40. Row 6 / Column 7 → 5 (Full House)
  41. Row 2 / Column 8 → 1 (Full House)
  42. Row 7 / Column 9 → 1 (Naked Single)
  43. Row 9 / Column 7 → 9 (Naked Single)
  44. Row 9 / Column 9 → 9 (Naked Single)
  45. Row 2 / Column 7 → 5 (Naked Single)
  46. Row 2 / Column 3 → 9 (Naked Single)
  47. Row 5 / Column 2 → 4 (Naked Single)
  48. Row 2 / Column 9 → 6 (Naked Single)
  49. Row 9 / Column 1 → 5 (Naked Single)
  50. Row 2 / Column 2 → 3 (Naked Single)
  51. Row 8 / Column 3 → 2 (Naked Single)
  52. Row 3 / Column 1 → 2 (Naked Single)
  53. Row 3 / Column 3 → 5 (Full House)
  54. Row 3 / Column 2 → 5 (Full House)
  55. Row 4 / Column 3 → 6 (Full House)
  56. Row 4 / Column 2 → 6 (Full House)
  57. Row 9 / Column 2 → 6 (Naked Single)
  58. Row 8 / Column 2 → 9 (Naked Single)
  59. Row 8 / Column 1 → 3 (Full House)
  60. Row 6 / Column 2 → 2 (Naked Single)
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