Solution for Evil Sudoku #4125413689739

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

This Sudoku Puzzle has 56 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Naked Triple, undefined techniques.

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

Solution Steps:

  1. Row 6 / Column 4 → 4 (Hidden Single)
  2. Row 7 / Column 6 → 4 (Hidden Single)
  3. Row 1 / Column 2 → 2 (Hidden Single)
  4. Row 2 / Column 8 → 2 (Hidden Single)
  5. Row 5 / Column 3 → 2 (Hidden Single)
  6. Row 4 / Column 9 → 2 (Hidden Single)
  7. Row 7 / Column 7 → 7 (Hidden Single)
  8. Row 8 / Column 4 → 1 (Hidden Single)
  9. Row 4 / Column 6 → 1 (Hidden Single)
  10. Row 8 / Column 9 → 4 (Hidden Single)
  11. Row 3 / Column 8 → 3 (Hidden Single)
  12. Row 5 / Column 7 → 9 (Hidden Single)
  13. Row 4 / Column 1 → 7 (Hidden Single)
  14. Row 7 / Column 3 → 1 (Hidden Single)
  15. Row 9 / Column 9 → 1 (Hidden Single)
  16. Row 2 / Column 5 → 1 (Hidden Single)
  17. Row 8 / Column 5 → 8 (Hidden Single)
  18. Row 6 / Column 7 → 1 (Hidden Single)
  19. Row 4 / Column 8 → 8 (Hidden Single)
  20. Row 4 / Column 7 → 5 (Naked Single)
  21. Row 4 / Column 3 → 9 (Full House)
  22. Row 6 / Column 9 → 6 (Full House)
  23. Row 3 / Column 9 → 5 (Full House)
  24. Row 6 / Column 1 → 8 (Hidden Single)
  25. Locked Candidates Type 1 (Pointing): 7 in b8 => r9c3<>7
  26. Naked Triple: 5,6,8 in r13c4,r2c6 => r1c5<>5
  27. W-Wing: 8/6 in r2c7,r3c4 connected by 6 in r1c47 => r2c6,r3c7<>8
  28. Row 2 / Column 6 → 5 (Naked Single)
  29. Row 1 / Column 4 → 6 (Naked Single)
  30. Row 2 / Column 1 → 3 (Naked Single)
  31. Row 9 / Column 6 → 7 (Naked Single)
  32. Row 5 / Column 6 → 8 (Full House)
  33. Row 1 / Column 7 → 4 (Naked Single)
  34. Row 3 / Column 4 → 8 (Naked Single)
  35. Row 5 / Column 4 → 5 (Full House)
  36. Row 5 / Column 5 → 7 (Full House)
  37. Row 2 / Column 2 → 6 (Naked Single)
  38. Row 2 / Column 7 → 8 (Full House)
  39. Row 3 / Column 7 → 6 (Full House)
  40. Row 1 / Column 5 → 9 (Naked Single)
  41. Row 1 / Column 1 → 5 (Full House)
  42. Row 3 / Column 5 → 4 (Full House)
  43. Row 7 / Column 1 → 9 (Full House)
  44. Row 3 / Column 3 → 7 (Naked Single)
  45. Row 3 / Column 2 → 9 (Full House)
  46. Row 8 / Column 3 → 5 (Naked Single)
  47. Row 6 / Column 3 → 3 (Naked Single)
  48. Row 6 / Column 2 → 5 (Full House)
  49. Row 9 / Column 3 → 6 (Full House)
  50. Row 7 / Column 2 → 3 (Naked Single)
  51. Row 8 / Column 2 → 7 (Full House)
  52. Row 8 / Column 8 → 9 (Full House)
  53. Row 9 / Column 8 → 5 (Naked Single)
  54. Row 7 / Column 8 → 6 (Full House)
  55. Row 7 / Column 5 → 5 (Full House)
  56. Row 9 / Column 5 → 3 (Full House)
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