Solution for Evil Sudoku #1218329547640

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

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 6 / Column 2 → 4 (Naked Single)
  2. Row 6 / Column 3 → 7 (Naked Single)
  3. Row 2 / Column 7 → 3 (Hidden Single)
  4. Row 2 / Column 2 → 6 (Naked Single)
  5. Row 5 / Column 8 → 5 (Hidden Single)
  6. Row 3 / Column 3 → 5 (Hidden Single)
  7. Row 5 / Column 1 → 2 (Hidden Single)
  8. Row 8 / Column 3 → 1 (Hidden Single)
  9. Row 9 / Column 1 → 3 (Hidden Single)
  10. Row 1 / Column 1 → 9 (Naked Single)
  11. Row 1 / Column 3 → 3 (Naked Single)
  12. Row 3 / Column 1 → 4 (Full House)
  13. Row 4 / Column 3 → 9 (Naked Single)
  14. Row 5 / Column 2 → 3 (Full House)
  15. Row 7 / Column 3 → 4 (Full House)
  16. Row 4 / Column 8 → 2 (Hidden Single)
  17. Row 2 / Column 8 → 7 (Naked Single)
  18. Row 2 / Column 9 → 2 (Naked Single)
  19. Row 4 / Column 5 → 3 (Hidden Single)
  20. Row 9 / Column 9 → 4 (Hidden Single)
  21. Row 3 / Column 4 → 7 (Hidden Single)
  22. Row 8 / Column 1 → 7 (Hidden Single)
  23. Row 7 / Column 1 → 6 (Full House)
  24. Locked Candidates Type 1 (Pointing): 6 in b6 => r39c7<>6
  25. Row 8 / Column 8 → 6 (Hidden Single)
  26. Row 3 / Column 8 → 8 (Full House)
  27. Naked Triple: 7,8,9 in r7c279 => r7c5<>9, r7c6<>8
  28. Hidden Pair: 8,9 in r59c4 => r9c4<>6
  29. Row 9 / Column 6 → 6 (Hidden Single)
  30. Naked Triple: 1,2,5 in r167c6 => r5c6<>1
  31. Skyscraper: 1 in r1c6,r5c5 (connected by r15c9) => r3c5,r6c6<>1
  32. Row 3 / Column 5 → 6 (Naked Single)
  33. Row 1 / Column 4 → 2 (Naked Single)
  34. Row 1 / Column 6 → 1 (Naked Single)
  35. Row 1 / Column 9 → 6 (Full House)
  36. Uniqueness Test 1: 2/5 in r6c56,r7c56 => r6c5<>2, r6c5<>5
  37. Row 6 / Column 5 → 1 (Naked Single)
  38. Row 5 / Column 5 → 9 (Naked Single)
  39. Row 6 / Column 7 → 6 (Naked Single)
  40. Row 5 / Column 4 → 8 (Naked Single)
  41. Row 8 / Column 5 → 4 (Naked Single)
  42. Row 4 / Column 7 → 7 (Naked Single)
  43. Row 5 / Column 9 → 1 (Full House)
  44. Row 5 / Column 6 → 7 (Full House)
  45. Row 6 / Column 4 → 5 (Naked Single)
  46. Row 6 / Column 6 → 2 (Full House)
  47. Row 9 / Column 4 → 9 (Naked Single)
  48. Row 9 / Column 7 → 8 (Full House)
  49. Row 2 / Column 5 → 5 (Naked Single)
  50. Row 2 / Column 4 → 4 (Full House)
  51. Row 7 / Column 5 → 2 (Full House)
  52. Row 4 / Column 4 → 6 (Full House)
  53. Row 4 / Column 6 → 4 (Full House)
  54. Row 8 / Column 6 → 8 (Naked Single)
  55. Row 7 / Column 6 → 5 (Full House)
  56. Row 8 / Column 2 → 9 (Full House)
  57. Row 7 / Column 2 → 8 (Full House)
  58. Row 3 / Column 9 → 9 (Naked Single)
  59. Row 3 / Column 7 → 1 (Full House)
  60. Row 7 / Column 7 → 9 (Full House)
  61. Row 7 / Column 9 → 7 (Full House)
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