Solution for Evil Sudoku #1283713524895

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

This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Quadruple, Naked Single, Locked Candidates Type 2 (Claiming), Full House, Give Up techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 2 → 3 (Hidden Single)
  2. Row 5 / Column 5 → 3 (Hidden Single)
  3. Row 8 / Column 8 → 8 (Hidden Single)
  4. Row 5 / Column 1 → 1 (Hidden Single)
  5. Row 7 / Column 1 → 4 (Hidden Single)
  6. Row 8 / Column 6 → 7 (Hidden Single)
  7. Row 5 / Column 8 → 7 (Hidden Single)
  8. Row 9 / Column 9 → 7 (Hidden Single)
  9. Row 7 / Column 7 → 3 (Hidden Single)
  10. Row 8 / Column 1 → 3 (Hidden Single)
  11. Row 1 / Column 3 → 7 (Hidden Single)
  12. Row 2 / Column 4 → 7 (Hidden Single)
  13. Row 1 / Column 9 → 4 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 1 in b2 => r3c9<>1
  15. Locked Candidates Type 1 (Pointing): 5 in b7 => r9c5<>5
  16. Naked Quadruple: 4,5,6,9 in r4c2346 => r4c8<>5, r4c8<>6, r4c8<>9
  17. Row 4 / Column 8 → 9 (Naked Single)
  18. Row 4 / Column 4 → 6 (Naked Single)
  19. Row 4 / Column 6 → 4 (Naked Single)
  20. Row 4 / Column 2 → 5 (Naked Single)
  21. Row 4 / Column 3 → 5 (Naked Single)
  22. Row 9 / Column 1 → 5 (Hidden Single)
  23. Locked Candidates Type 1 (Pointing): 9 in b5 => r6c2<>9
  24. Locked Candidates Type 2 (Claiming): 5 in r2 => r1c8<>5
  25. Locked Candidates Type 2 (Claiming): 5 in r1 => r3c56<>5
  26. Locked Candidates Type 2 (Claiming): 2 in c1 => r3c23<>2
  27. Locked Candidates Type 2 (Claiming): 6 in c1 => r23c3,r3c2<>6
  28. Row 2 / Column 3 → 9 (Naked Single)
  29. Row 3 / Column 2 → 4 (Naked Single)
  30. Row 3 / Column 3 → 4 (Naked Single)
  31. Row 3 / Column 9 → 9 (Hidden Single)
  32. Row 5 / Column 2 → 9 (Hidden Single)
  33. Row 6 / Column 7 → 4 (Hidden Single)
  34. Row 3 / Column 1 → 2 (Hidden Single)
  35. Row 1 / Column 1 → 6 (Full House)
  36. Row 1 / Column 8 → 2 (Naked Single)
  37. Row 8 / Column 7 → 9 (Hidden Single)
  38. Row 6 / Column 8 → 5 (Hidden Single)
  39. Row 2 / Column 7 → 5 (Hidden Single)
  40. Row 6 / Column 2 → 2 (Hidden Single)
  41. Row 8 / Column 2 → 6 (Full House)
  42. Row 9 / Column 2 → 6 (Full House)
  43. Row 8 / Column 3 → 2 (Full House)
  44. Row 5 / Column 3 → 6 (Naked Single)
  45. Row 9 / Column 7 → 2 (Full House)
  46. Row 5 / Column 7 → 2 (Full House)
  47. Row 5 / Column 9 → 2 (Full House)
  48. Row 7 / Column 4 → 2 (Hidden Single)
  49. Locked Candidates Type 1 (Pointing): 6 in b8 => r7c89<>6
  50. Row 7 / Column 8 → 1 (Full House)
  51. Row 7 / Column 9 → 1 (Full House)
  52. Row 2 / Column 8 → 6 (Full House)
  53. Row 2 / Column 9 → 6 (Full House)
  54. Locked Candidates Type 2 (Claiming): 9 in r7 => r9c45<>9
  55. Row 9 / Column 4 → 8 (Naked Single)
  56. Row 9 / Column 5 → 8 (Naked Single)
  57. Row 3 / Column 4 → 1 (Naked Single)
  58. Row 6 / Column 4 → 9 (Full House)
  59. Row 6 / Column 6 → 1 (Full House)
  60. Row 3 / Column 5 → 6 (Naked Single)
  61. Row 3 / Column 6 → 6 (Naked Single)
  62. Give Up: Don't know how to proceed!
Show More...