Solution for Evil Sudoku #3198712635475

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

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

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

Solution Steps:

  1. Row 6 / Column 9 → 2 (Naked Single)
  2. Row 6 / Column 8 → 9 (Naked Single)
  3. Row 6 / Column 3 → 4 (Naked Single)
  4. Row 5 / Column 3 → 9 (Naked Single)
  5. Row 4 / Column 7 → 3 (Hidden Single)
  6. Row 5 / Column 1 → 7 (Hidden Single)
  7. Row 5 / Column 4 → 2 (Naked Single)
  8. Row 4 / Column 4 → 9 (Naked Single)
  9. Row 4 / Column 6 → 8 (Naked Single)
  10. Row 5 / Column 6 → 4 (Naked Single)
  11. Locked Candidates Type 1 (Pointing): 4 in b3 => r89c8<>4
  12. Locked Candidates Type 1 (Pointing): 7 in b3 => r2c256<>7
  13. Locked Candidates Type 1 (Pointing): 1 in b7 => r8c4789<>1
  14. Row 9 / Column 4 → 1 (Hidden Single)
  15. Row 9 / Column 8 → 5 (Naked Single)
  16. Row 3 / Column 8 → 4 (Naked Single)
  17. Row 1 / Column 8 → 1 (Naked Single)
  18. Row 2 / Column 7 → 7 (Naked Single)
  19. Row 2 / Column 9 → 5 (Full House)
  20. Row 8 / Column 7 → 4 (Naked Single)
  21. Row 1 / Column 2 → 4 (Hidden Single)
  22. Row 9 / Column 5 → 4 (Hidden Single)
  23. Row 3 / Column 2 → 7 (Hidden Single)
  24. Locked Candidates Type 1 (Pointing): 9 in b7 => r2c2<>9
  25. Naked Pair: 2,5 in r34c1 => r18c1<>5, r2c1<>2
  26. Naked Pair: 6,7 in r69c6 => r127c6<>6, r1c6<>7
  27. Row 1 / Column 6 → 5 (Naked Single)
  28. Row 1 / Column 3 → 8 (Naked Single)
  29. Row 3 / Column 4 → 3 (Naked Single)
  30. Row 2 / Column 6 → 2 (Naked Single)
  31. Row 3 / Column 3 → 5 (Naked Single)
  32. Row 2 / Column 2 → 6 (Naked Single)
  33. Row 3 / Column 5 → 8 (Naked Single)
  34. Row 3 / Column 1 → 2 (Full House)
  35. Row 7 / Column 6 → 3 (Naked Single)
  36. Row 8 / Column 3 → 1 (Naked Single)
  37. Row 2 / Column 3 → 3 (Full House)
  38. Row 1 / Column 1 → 9 (Naked Single)
  39. Row 2 / Column 1 → 1 (Full House)
  40. Row 2 / Column 5 → 9 (Full House)
  41. Row 9 / Column 2 → 9 (Naked Single)
  42. Row 4 / Column 1 → 5 (Naked Single)
  43. Row 8 / Column 1 → 6 (Full House)
  44. Row 7 / Column 2 → 5 (Full House)
  45. Row 4 / Column 2 → 2 (Full House)
  46. Row 7 / Column 8 → 2 (Naked Single)
  47. Row 8 / Column 8 → 3 (Full House)
  48. Row 9 / Column 7 → 8 (Naked Single)
  49. Row 8 / Column 9 → 7 (Naked Single)
  50. Row 7 / Column 5 → 6 (Naked Single)
  51. Row 5 / Column 7 → 1 (Naked Single)
  52. Row 5 / Column 9 → 8 (Full House)
  53. Row 7 / Column 7 → 9 (Full House)
  54. Row 7 / Column 9 → 1 (Full House)
  55. Row 9 / Column 9 → 6 (Full House)
  56. Row 9 / Column 6 → 7 (Full House)
  57. Row 6 / Column 6 → 6 (Full House)
  58. Row 6 / Column 4 → 7 (Full House)
  59. Row 8 / Column 4 → 5 (Naked Single)
  60. Row 8 / Column 5 → 2 (Full House)
  61. Row 1 / Column 5 → 7 (Full House)
  62. Row 1 / Column 4 → 6 (Full House)
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