Solution for Evil Sudoku #2174523981639

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

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

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

Solution Steps:

  1. Row 5 / Column 3 → 7 (Hidden Single)
  2. Row 4 / Column 4 → 5 (Hidden Single)
  3. Row 3 / Column 6 → 5 (Hidden Single)
  4. Row 3 / Column 7 → 6 (Hidden Single)
  5. Row 9 / Column 2 → 7 (Hidden Single)
  6. Row 6 / Column 9 → 7 (Hidden Single)
  7. Row 8 / Column 8 → 7 (Hidden Single)
  8. Row 5 / Column 7 → 1 (Hidden Single)
  9. Row 2 / Column 4 → 2 (Hidden Single)
  10. Row 6 / Column 6 → 2 (Hidden Single)
  11. Row 2 / Column 9 → 5 (Hidden Single)
  12. Row 6 / Column 1 → 6 (Hidden Single)
  13. Row 7 / Column 8 → 3 (Hidden Single)
  14. Row 1 / Column 9 → 2 (Hidden Single)
  15. Row 3 / Column 3 → 2 (Hidden Single)
  16. Row 8 / Column 5 → 2 (Hidden Single)
  17. Row 2 / Column 5 → 8 (Hidden Single)
  18. Row 4 / Column 7 → 2 (Hidden Single)
  19. Row 6 / Column 3 → 1 (Hidden Single)
  20. Row 4 / Column 1 → 8 (Hidden Single)
  21. Row 6 / Column 8 → 8 (Hidden Single)
  22. Row 6 / Column 7 → 4 (Full House)
  23. Row 4 / Column 9 → 9 (Full House)
  24. Row 7 / Column 9 → 4 (Full House)
  25. Locked Candidates Type 1 (Pointing): 6 in b2 => r1c3<>6
  26. Naked Triple: 4,8,9 in r79c4,r8c6 => r9c5<>4
  27. W-Wing: 8/9 in r7c4,r8c7 connected by 9 in r9c47 => r7c7,r8c6<>8
  28. Row 8 / Column 6 → 4 (Naked Single)
  29. Row 1 / Column 6 → 6 (Naked Single)
  30. Row 5 / Column 6 → 8 (Full House)
  31. Row 8 / Column 1 → 3 (Naked Single)
  32. Row 9 / Column 4 → 9 (Naked Single)
  33. Row 5 / Column 4 → 4 (Naked Single)
  34. Row 7 / Column 4 → 8 (Full House)
  35. Row 5 / Column 5 → 6 (Full House)
  36. Row 8 / Column 2 → 9 (Naked Single)
  37. Row 8 / Column 7 → 8 (Full House)
  38. Row 9 / Column 7 → 5 (Naked Single)
  39. Row 7 / Column 7 → 9 (Full House)
  40. Row 7 / Column 3 → 6 (Naked Single)
  41. Row 9 / Column 5 → 1 (Naked Single)
  42. Row 7 / Column 5 → 5 (Full House)
  43. Row 7 / Column 2 → 1 (Full House)
  44. Row 9 / Column 1 → 4 (Full House)
  45. Row 3 / Column 1 → 1 (Full House)
  46. Row 2 / Column 3 → 4 (Naked Single)
  47. Row 2 / Column 2 → 6 (Naked Single)
  48. Row 2 / Column 8 → 1 (Full House)
  49. Row 3 / Column 2 → 3 (Naked Single)
  50. Row 1 / Column 3 → 9 (Full House)
  51. Row 4 / Column 3 → 3 (Full House)
  52. Row 4 / Column 2 → 4 (Full House)
  53. Row 3 / Column 5 → 4 (Naked Single)
  54. Row 1 / Column 5 → 3 (Full House)
  55. Row 1 / Column 8 → 4 (Full House)
  56. Row 3 / Column 8 → 9 (Full House)
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