Solution for Evil Sudoku #2242178359695

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

This Sudoku Puzzle has 59 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Pair, Locked Triple, Locked Candidates Type 1 (Pointing) techniques.

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

Solution Steps:

  1. Row 4 / Column 6 → 2 (Naked Single)
  2. Row 6 / Column 6 → 7 (Naked Single)
  3. Row 6 / Column 4 → 9 (Naked Single)
  4. Row 4 / Column 4 → 8 (Naked Single)
  5. Row 5 / Column 5 → 4 (Full House)
  6. Row 7 / Column 9 → 9 (Hidden Single)
  7. Row 5 / Column 9 → 7 (Hidden Single)
  8. Row 3 / Column 4 → 7 (Hidden Single)
  9. Row 5 / Column 3 → 9 (Hidden Single)
  10. Locked Pair: 5,8 in r5c78 => r5c12,r6c8<>5
  11. Locked Triple: 2,3,7 in r2c123 => r1c2,r2c78<>3, r1c12,r2c8,r3c1<>2
  12. Locked Candidates Type 1 (Pointing): 4 in b2 => r79c6<>4
  13. Row 7 / Column 6 → 5 (Naked Single)
  14. Row 9 / Column 8 → 4 (Hidden Single)
  15. Row 2 / Column 8 → 8 (Naked Single)
  16. Row 5 / Column 8 → 5 (Naked Single)
  17. Row 5 / Column 7 → 8 (Naked Single)
  18. Row 8 / Column 8 → 2 (Naked Single)
  19. Row 8 / Column 7 → 5 (Naked Single)
  20. Row 8 / Column 9 → 8 (Naked Single)
  21. Row 9 / Column 9 → 3 (Full House)
  22. Row 8 / Column 3 → 6 (Naked Single)
  23. Locked Candidates Type 1 (Pointing): 6 in b4 => r1c2<>6
  24. Row 1 / Column 2 → 5 (Naked Single)
  25. Row 1 / Column 9 → 2 (Naked Single)
  26. Row 3 / Column 9 → 5 (Full House)
  27. Row 9 / Column 1 → 5 (Hidden Single)
  28. Row 9 / Column 3 → 8 (Naked Single)
  29. Row 7 / Column 3 → 2 (Naked Single)
  30. Row 9 / Column 5 → 6 (Naked Single)
  31. Row 9 / Column 6 → 1 (Full House)
  32. Row 2 / Column 3 → 3 (Naked Single)
  33. Row 6 / Column 3 → 5 (Full House)
  34. Row 7 / Column 1 → 7 (Naked Single)
  35. Row 1 / Column 5 → 3 (Naked Single)
  36. Row 2 / Column 6 → 4 (Naked Single)
  37. Row 3 / Column 6 → 6 (Full House)
  38. Row 8 / Column 4 → 4 (Naked Single)
  39. Row 8 / Column 2 → 1 (Full House)
  40. Row 7 / Column 2 → 4 (Full House)
  41. Row 2 / Column 1 → 2 (Naked Single)
  42. Row 1 / Column 4 → 1 (Naked Single)
  43. Row 3 / Column 5 → 2 (Full House)
  44. Row 7 / Column 5 → 8 (Full House)
  45. Row 7 / Column 4 → 3 (Full House)
  46. Row 2 / Column 7 → 1 (Naked Single)
  47. Row 2 / Column 2 → 7 (Full House)
  48. Row 3 / Column 1 → 9 (Naked Single)
  49. Row 1 / Column 1 → 6 (Full House)
  50. Row 5 / Column 1 → 1 (Full House)
  51. Row 5 / Column 2 → 2 (Full House)
  52. Row 1 / Column 7 → 9 (Full House)
  53. Row 3 / Column 8 → 3 (Naked Single)
  54. Row 3 / Column 7 → 4 (Full House)
  55. Row 4 / Column 7 → 3 (Full House)
  56. Row 6 / Column 8 → 6 (Naked Single)
  57. Row 4 / Column 8 → 9 (Full House)
  58. Row 4 / Column 2 → 6 (Full House)
  59. Row 6 / Column 2 → 3 (Full House)
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