Solution for Evil Sudoku #1218729536475

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

This Sudoku Puzzle has 61 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 9 / Column 6 → 9 (Naked Single)
  2. Row 8 / Column 6 → 1 (Naked Single)
  3. Row 3 / Column 6 → 4 (Naked Single)
  4. Row 3 / Column 5 → 1 (Naked Single)
  5. Row 1 / Column 5 → 7 (Hidden Single)
  6. Row 4 / Column 5 → 9 (Naked Single)
  7. Row 4 / Column 4 → 1 (Naked Single)
  8. Row 6 / Column 4 → 8 (Naked Single)
  9. Row 6 / Column 5 → 4 (Naked Single)
  10. Row 7 / Column 4 → 3 (Naked Single)
  11. Locked Candidates Type 1 (Pointing): 1 in b3 => r2c12<>1
  12. Locked Candidates Type 1 (Pointing): 2 in b3 => r4789c8<>2
  13. Row 4 / Column 9 → 2 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 4 in b7 => r8c89<>4
  15. Row 8 / Column 9 → 6 (Naked Single)
  16. Row 8 / Column 3 → 4 (Naked Single)
  17. Row 8 / Column 1 → 2 (Naked Single)
  18. Row 7 / Column 2 → 7 (Naked Single)
  19. Row 9 / Column 2 → 6 (Full House)
  20. Row 7 / Column 8 → 4 (Naked Single)
  21. Row 2 / Column 1 → 4 (Hidden Single)
  22. Row 5 / Column 9 → 4 (Hidden Single)
  23. Row 2 / Column 3 → 7 (Hidden Single)
  24. Naked Pair: 6,9 in r1c34 => r1c18<>6, r1c2<>9
  25. Naked Pair: 5,7 in r6c69 => r6c127<>5, r6c1<>7
  26. Row 6 / Column 1 → 6 (Naked Single)
  27. Row 3 / Column 1 → 8 (Naked Single)
  28. Row 4 / Column 3 → 3 (Naked Single)
  29. Row 3 / Column 3 → 6 (Naked Single)
  30. Row 6 / Column 2 → 9 (Naked Single)
  31. Row 1 / Column 3 → 9 (Naked Single)
  32. Row 5 / Column 3 → 8 (Full House)
  33. Row 3 / Column 8 → 2 (Naked Single)
  34. Row 3 / Column 2 → 3 (Full House)
  35. Row 2 / Column 2 → 5 (Naked Single)
  36. Row 6 / Column 7 → 3 (Naked Single)
  37. Row 1 / Column 4 → 6 (Naked Single)
  38. Row 2 / Column 4 → 9 (Full House)
  39. Row 1 / Column 8 → 5 (Naked Single)
  40. Row 1 / Column 1 → 1 (Naked Single)
  41. Row 1 / Column 2 → 2 (Full House)
  42. Row 5 / Column 2 → 1 (Full House)
  43. Row 2 / Column 9 → 1 (Naked Single)
  44. Row 2 / Column 7 → 6 (Full House)
  45. Row 8 / Column 7 → 9 (Naked Single)
  46. Row 8 / Column 8 → 3 (Full House)
  47. Row 9 / Column 8 → 7 (Naked Single)
  48. Row 7 / Column 9 → 8 (Naked Single)
  49. Row 5 / Column 7 → 5 (Naked Single)
  50. Row 4 / Column 8 → 6 (Naked Single)
  51. Row 5 / Column 8 → 9 (Full House)
  52. Row 5 / Column 1 → 7 (Full House)
  53. Row 6 / Column 9 → 7 (Full House)
  54. Row 9 / Column 9 → 5 (Full House)
  55. Row 4 / Column 1 → 5 (Full House)
  56. Row 6 / Column 6 → 5 (Full House)
  57. Row 4 / Column 6 → 7 (Full House)
  58. Row 7 / Column 5 → 2 (Naked Single)
  59. Row 7 / Column 7 → 1 (Full House)
  60. Row 9 / Column 7 → 2 (Full House)
  61. Row 9 / Column 5 → 8 (Full House)
Show More...