Solution for Evil Sudoku #1372845391644

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

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

Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 1 → 8 (Naked Single)
  2. Row 5 / Column 9 → 7 (Naked Single)
  3. Row 5 / Column 5 → 6 (Full House)
  4. Row 6 / Column 4 → 1 (Hidden Single)
  5. Row 6 / Column 7 → 6 (Hidden Single)
  6. Row 9 / Column 2 → 7 (Hidden Single)
  7. Row 4 / Column 3 → 5 (Hidden Single)
  8. Row 1 / Column 8 → 8 (Hidden Single)
  9. Row 2 / Column 8 → 5 (Hidden Single)
  10. Row 2 / Column 9 → 1 (Hidden Single)
  11. Row 1 / Column 9 → 3 (Hidden Single)
  12. Row 1 / Column 3 → 4 (Naked Single)
  13. Row 3 / Column 7 → 4 (Hidden Single)
  14. Row 7 / Column 9 → 4 (Hidden Single)
  15. Row 8 / Column 1 → 4 (Hidden Single)
  16. Naked Pair: 2,9 in r8c2,r8c9 => r8c4<>9,r8c6<>2,r8c6<>9
  17. X-Wing: 2 r4r8 c2c9 => r7c2<>2
  18. X-Wing: 2 r1r7 c5c7 => r3c5<>2,r9c5<>2,r9c7<>2
  19. XY-Chain: r1c7-r3c8-r6c8-r4c9-r8c9-r8c2-r7c2-r4c2-r6c1-r2c1 => r2c7<>7
  20. Row 2 / Column 7 → 9 (Naked Single)
  21. Row 3 / Column 8 → 2 (Naked Single)
  22. Row 6 / Column 8 → 9 (Full House)
  23. Row 1 / Column 7 → 7 (Full House)
  24. Row 4 / Column 9 → 2 (Full House)
  25. Row 8 / Column 9 → 9 (Full House)
  26. Row 1 / Column 4 → 5 (Naked Single)
  27. Row 1 / Column 5 → 2 (Full House)
  28. Row 4 / Column 2 → 3 (Naked Single)
  29. Row 6 / Column 1 → 2 (Full House)
  30. Row 7 / Column 2 → 9 (Naked Single)
  31. Row 8 / Column 2 → 2 (Full House)
  32. Row 8 / Column 4 → 6 (Naked Single)
  33. Row 7 / Column 4 → 3 (Naked Single)
  34. Row 2 / Column 4 → 7 (Naked Single)
  35. Row 4 / Column 4 → 9 (Full House)
  36. Row 2 / Column 1 → 3 (Naked Single)
  37. Row 2 / Column 6 → 6 (Full House)
  38. Row 3 / Column 3 → 1 (Naked Single)
  39. Row 3 / Column 1 → 7 (Full House)
  40. Row 9 / Column 1 → 1 (Full House)
  41. Row 4 / Column 6 → 8 (Naked Single)
  42. Row 4 / Column 5 → 7 (Full House)
  43. Row 7 / Column 5 → 8 (Naked Single)
  44. Row 7 / Column 3 → 6 (Naked Single)
  45. Row 7 / Column 7 → 2 (Full House)
  46. Row 9 / Column 7 → 8 (Full House)
  47. Row 8 / Column 3 → 8 (Naked Single)
  48. Row 8 / Column 6 → 5 (Full House)
  49. Row 9 / Column 3 → 3 (Full House)
  50. Row 6 / Column 6 → 3 (Naked Single)
  51. Row 6 / Column 5 → 5 (Full House)
  52. Row 3 / Column 6 → 9 (Naked Single)
  53. Row 3 / Column 5 → 3 (Full House)
  54. Row 9 / Column 5 → 9 (Full House)
  55. Row 9 / Column 6 → 2 (Full House)
Show More...