Solution for Evil Sudoku #1217396582444

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

This Sudoku Puzzle has steps and it is solved using techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 1 / Column 5 → 1 (Naked Single)
  2. Row 9 / Column 5 → 3 (Naked Single)
  3. Row 5 / Column 5 → 4 (Full House)
  4. Row 1 / Column 2 → 2 (Hidden Single)
  5. Row 1 / Column 1 → 5 (Hidden Single)
  6. Row 7 / Column 1 → 9 (Naked Single)
  7. Row 2 / Column 1 → 3 (Hidden Single)
  8. Row 2 / Column 2 → 6 (Hidden Single)
  9. Row 3 / Column 6 → 4 (Hidden Single)
  10. Row 6 / Column 6 → 2 (Hidden Single)
  11. Row 7 / Column 4 → 6 (Hidden Single)
  12. Row 8 / Column 9 → 1 (Hidden Single)
  13. Row 9 / Column 8 → 9 (Hidden Single)
  14. Row 1 / Column 7 → 9 (Hidden Single)
  15. Row 3 / Column 3 → 9 (Hidden Single)
  16. Naked Pair: 7,8 in r1c8,r8c8 => r4c8<>7,r4c8<>8,r6c8<>8
  17. X-Wing: 7 c4c8 r1r8 => r8c7<>7
  18. X-Wing: 7 c1c7 r3r5 => r3c9<>7,r5c3<>7,r5c9<>7
  19. XY-Chain: r1c4-r1c8-r8c8-r8c7-r8c4-r9c6-r9c2-r3c2-r2c3 => r2c6<>7
  20. Row 2 / Column 6 → 8 (Naked Single)
  21. Row 2 / Column 3 → 7 (Full House)
  22. Row 1 / Column 4 → 7 (Full House)
  23. Row 1 / Column 8 → 8 (Full House)
  24. Row 3 / Column 1 → 1 (Naked Single)
  25. Row 3 / Column 2 → 8 (Full House)
  26. Row 3 / Column 9 → 3 (Naked Single)
  27. Row 3 / Column 7 → 7 (Full House)
  28. Row 6 / Column 1 → 6 (Naked Single)
  29. Row 5 / Column 1 → 7 (Full House)
  30. Row 6 / Column 8 → 4 (Naked Single)
  31. Row 7 / Column 8 → 3 (Naked Single)
  32. Row 4 / Column 8 → 6 (Naked Single)
  33. Row 8 / Column 8 → 7 (Full House)
  34. Row 4 / Column 6 → 5 (Naked Single)
  35. Row 4 / Column 2 → 4 (Naked Single)
  36. Row 4 / Column 3 → 8 (Naked Single)
  37. Row 4 / Column 4 → 3 (Naked Single)
  38. Row 4 / Column 9 → 7 (Full House)
  39. Row 5 / Column 6 → 6 (Naked Single)
  40. Row 9 / Column 6 → 7 (Full House)
  41. Row 8 / Column 4 → 5 (Full House)
  42. Row 8 / Column 7 → 8 (Full House)
  43. Row 6 / Column 7 → 5 (Naked Single)
  44. Row 5 / Column 7 → 3 (Naked Single)
  45. Row 7 / Column 7 → 4 (Full House)
  46. Row 5 / Column 9 → 8 (Full House)
  47. Row 5 / Column 4 → 1 (Naked Single)
  48. Row 5 / Column 3 → 5 (Full House)
  49. Row 6 / Column 4 → 8 (Full House)
  50. Row 6 / Column 2 → 1 (Full House)
  51. Row 9 / Column 2 → 5 (Full House)
  52. Row 7 / Column 3 → 2 (Naked Single)
  53. Row 7 / Column 9 → 5 (Full House)
  54. Row 9 / Column 3 → 1 (Full House)
  55. Row 9 / Column 9 → 2 (Full House)
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