Solution for Evil Sudoku #1246713524895

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

This Sudoku Puzzle has 59 steps and it is solved using Hidden Single, Locked Pair, Naked Single, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 1 → 1 (Hidden Single)
  2. Row 3 / Column 3 → 4 (Hidden Single)
  3. Locked Pair: 1,9 in r6c46 => r4c46,r5c5,r6c278<>9
  4. Row 4 / Column 4 → 6 (Naked Single)
  5. Row 4 / Column 6 → 3 (Naked Single)
  6. Row 5 / Column 5 → 3 (Naked Single)
  7. Locked Pair: 2,9 in r5c23 => r5c789,r6c2<>2, r4c23,r5c789<>9
  8. Row 5 / Column 7 → 6 (Naked Single)
  9. Row 4 / Column 3 → 5 (Naked Single)
  10. Row 5 / Column 8 → 7 (Naked Single)
  11. Row 5 / Column 9 → 7 (Naked Single)
  12. Row 4 / Column 2 → 8 (Naked Single)
  13. Row 4 / Column 8 → 9 (Full House)
  14. Row 6 / Column 2 → 8 (Naked Single)
  15. Row 8 / Column 6 → 7 (Hidden Single)
  16. Row 1 / Column 3 → 7 (Hidden Single)
  17. Row 2 / Column 4 → 7 (Hidden Single)
  18. Locked Pair: 5,9 in r7c56 => r7c1,r9c5<>5, r7c1479,r9c45<>9
  19. Row 7 / Column 4 → 2 (Naked Single)
  20. Row 9 / Column 5 → 8 (Naked Single)
  21. Row 7 / Column 7 → 3 (Naked Single)
  22. Row 9 / Column 4 → 8 (Naked Single)
  23. Row 7 / Column 1 → 6 (Naked Single)
  24. Row 7 / Column 8 → 1 (Naked Single)
  25. Row 7 / Column 9 → 1 (Naked Single)
  26. Row 8 / Column 7 → 8 (Hidden Single)
  27. Row 3 / Column 9 → 8 (Hidden Single)
  28. Row 8 / Column 8 → 6 (Hidden Single)
  29. Row 2 / Column 8 → 5 (Naked Single)
  30. Row 1 / Column 8 → 2 (Full House)
  31. Row 6 / Column 8 → 2 (Full House)
  32. Row 2 / Column 7 → 9 (Naked Single)
  33. Row 1 / Column 9 → 6 (Full House)
  34. Row 2 / Column 9 → 6 (Full House)
  35. Row 6 / Column 7 → 5 (Naked Single)
  36. Row 9 / Column 7 → 2 (Full House)
  37. Row 2 / Column 3 → 3 (Naked Single)
  38. Row 2 / Column 2 → 3 (Naked Single)
  39. Row 9 / Column 9 → 9 (Naked Single)
  40. Row 9 / Column 2 → 5 (Naked Single)
  41. Row 9 / Column 1 → 3 (Naked Single)
  42. Row 3 / Column 5 → 6 (Hidden Single)
  43. Locked Pair: 5,9 in r1c56 => r1c1,r3c6<>5, r1c1,r3c46<>9
  44. Row 1 / Column 1 → 9 (Naked Single)
  45. Row 3 / Column 4 → 1 (Naked Single)
  46. Row 3 / Column 6 → 1 (Naked Single)
  47. Row 1 / Column 5 → 5 (Naked Single)
  48. Row 1 / Column 6 → 5 (Naked Single)
  49. Row 3 / Column 2 → 2 (Naked Single)
  50. Row 8 / Column 1 → 2 (Naked Single)
  51. Row 8 / Column 2 → 9 (Full House)
  52. Row 8 / Column 3 → 9 (Full House)
  53. Row 6 / Column 4 → 9 (Naked Single)
  54. Row 6 / Column 6 → 9 (Naked Single)
  55. Row 7 / Column 5 → 9 (Naked Single)
  56. Row 7 / Column 6 → 9 (Naked Single)
  57. Row 3 / Column 1 → 5 (Naked Single)
  58. Row 5 / Column 2 → 9 (Naked Single)
  59. Row 5 / Column 3 → 2 (Naked Single)
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