Solution for Evil Sudoku #2153941278640

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

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

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

Solution Steps:

  1. Row 8 / Column 4 → 7 (Naked Single)
  2. Row 7 / Column 4 → 8 (Naked Single)
  3. Row 3 / Column 8 → 9 (Hidden Single)
  4. Row 8 / Column 8 → 6 (Naked Single)
  5. Row 9 / Column 1 → 9 (Hidden Single)
  6. Row 9 / Column 9 → 1 (Naked Single)
  7. Row 7 / Column 9 → 9 (Naked Single)
  8. Row 9 / Column 5 → 4 (Naked Single)
  9. Row 9 / Column 7 → 7 (Naked Single)
  10. Row 7 / Column 7 → 2 (Full House)
  11. Row 7 / Column 6 → 1 (Naked Single)
  12. Row 8 / Column 5 → 9 (Full House)
  13. Row 7 / Column 3 → 7 (Naked Single)
  14. Row 7 / Column 2 → 5 (Full House)
  15. Row 2 / Column 5 → 2 (Hidden Single)
  16. Row 5 / Column 6 → 9 (Hidden Single)
  17. Row 2 / Column 6 → 4 (Hidden Single)
  18. Row 2 / Column 8 → 8 (Naked Single)
  19. Row 1 / Column 8 → 4 (Naked Single)
  20. Row 1 / Column 1 → 7 (Hidden Single)
  21. Row 9 / Column 2 → 8 (Hidden Single)
  22. Row 9 / Column 3 → 6 (Full House)
  23. Row 6 / Column 7 → 8 (Hidden Single)
  24. Locked Candidates Type 1 (Pointing): 6 in b2 => r3c17<>6
  25. Row 2 / Column 2 → 6 (Hidden Single)
  26. Row 2 / Column 7 → 3 (Full House)
  27. Naked Triple: 1,3,8 in r138c3 => r4c3<>3, r5c3<>1
  28. Hidden Pair: 1,3 in r6c15 => r6c1<>6
  29. Row 4 / Column 1 → 6 (Hidden Single)
  30. Naked Triple: 2,4,5 in r4c349 => r4c5<>5
  31. Skyscraper: 5 in r3c7,r4c9 (connected by r34c4) => r1c9,r5c7<>5
  32. Row 1 / Column 9 → 6 (Naked Single)
  33. Row 5 / Column 7 → 6 (Naked Single)
  34. Row 6 / Column 9 → 4 (Naked Single)
  35. Row 4 / Column 9 → 5 (Full House)
  36. Uniqueness Test 1: 2/4 in r4c34,r5c34 => r5c4<>2, r5c4<>4
  37. Row 5 / Column 4 → 5 (Naked Single)
  38. Row 3 / Column 4 → 6 (Naked Single)
  39. Row 5 / Column 5 → 1 (Naked Single)
  40. Row 3 / Column 6 → 8 (Naked Single)
  41. Row 1 / Column 5 → 5 (Full House)
  42. Row 6 / Column 4 → 2 (Naked Single)
  43. Row 4 / Column 4 → 4 (Full House)
  44. Row 5 / Column 2 → 7 (Naked Single)
  45. Row 6 / Column 5 → 3 (Naked Single)
  46. Row 4 / Column 5 → 8 (Full House)
  47. Row 4 / Column 6 → 7 (Naked Single)
  48. Row 6 / Column 6 → 6 (Full House)
  49. Row 1 / Column 7 → 1 (Naked Single)
  50. Row 1 / Column 3 → 8 (Full House)
  51. Row 3 / Column 7 → 5 (Full House)
  52. Row 6 / Column 8 → 7 (Naked Single)
  53. Row 5 / Column 8 → 2 (Full House)
  54. Row 6 / Column 1 → 1 (Full House)
  55. Row 5 / Column 3 → 4 (Full House)
  56. Row 3 / Column 1 → 3 (Full House)
  57. Row 3 / Column 3 → 1 (Full House)
  58. Row 4 / Column 3 → 2 (Naked Single)
  59. Row 4 / Column 2 → 3 (Full House)
  60. Row 8 / Column 3 → 3 (Full House)
  61. Row 8 / Column 2 → 1 (Full House)
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