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

This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Naked Triple, undefined techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 7 → 9 (Hidden Single)
  2. Row 7 / Column 5 → 9 (Hidden Single)
  3. Row 5 / Column 5 → 8 (Hidden Single)
  4. Row 8 / Column 8 → 8 (Hidden Single)
  5. Row 2 / Column 4 → 2 (Hidden Single)
  6. Row 9 / Column 5 → 2 (Hidden Single)
  7. Row 5 / Column 9 → 4 (Hidden Single)
  8. Row 7 / Column 2 → 8 (Hidden Single)
  9. Row 4 / Column 4 → 9 (Hidden Single)
  10. Row 6 / Column 5 → 4 (Hidden Single)
  11. Row 9 / Column 9 → 3 (Hidden Single)
  12. Row 6 / Column 7 → 3 (Hidden Single)
  13. Row 6 / Column 4 → 1 (Hidden Single)
  14. Row 4 / Column 5 → 3 (Hidden Single)
  15. Row 6 / Column 6 → 6 (Hidden Single)
  16. Row 5 / Column 4 → 7 (Naked Single)
  17. Row 4 / Column 6 → 5 (Full House)
  18. Row 8 / Column 4 → 6 (Full House)
  19. Row 5 / Column 1 → 3 (Hidden Single)
  20. Row 5 / Column 2 → 5 (Naked Single)
  21. Row 5 / Column 3 → 6 (Full House)
  22. Row 9 / Column 1 → 6 (Hidden Single)
  23. Locked Candidates Type 1 (Pointing): 2 in b4 => r3c2<>2
  24. Locked Candidates Type 1 (Pointing): 7 in b6 => r29c8<>7
  25. Locked Candidates Type 1 (Pointing): 5 in b7 => r123c3<>5
  26. Locked Candidates Type 1 (Pointing): 7 in b8 => r123c6<>7
  27. Naked Triple: 1,2,7 in r346c2 => r2c2<>1, r28c2<>7
  28. X-Wing: 4 r17 c17 => r289c7<>4
  29. Naked Triple: 1,5,7 in r289c7 => r137c7<>1, r13c7<>5, r137c7<>7
  30. Locked Candidates Type 1 (Pointing): 5 in b3 => r2c5<>5
  31. XY-Wing: 5/7/4 in r8c67,r9c8 => r9c6<>4
  32. Row 9 / Column 6 → 7 (Naked Single)
  33. Row 8 / Column 6 → 4 (Full House)
  34. Row 8 / Column 2 → 3 (Naked Single)
  35. Row 2 / Column 2 → 4 (Naked Single)
  36. Row 2 / Column 8 → 5 (Naked Single)
  37. Row 9 / Column 8 → 4 (Naked Single)
  38. Row 7 / Column 7 → 2 (Naked Single)
  39. Row 3 / Column 7 → 8 (Naked Single)
  40. Row 1 / Column 7 → 4 (Naked Single)
  41. Row 7 / Column 1 → 4 (Hidden Single)
  42. Row 2 / Column 3 → 3 (Hidden Single)
  43. Row 1 / Column 6 → 8 (Hidden Single)
  44. Row 2 / Column 6 → 9 (Hidden Single)
  45. Row 3 / Column 6 → 1 (Full House)
  46. Row 3 / Column 2 → 7 (Naked Single)
  47. Row 3 / Column 1 → 5 (Naked Single)
  48. Row 6 / Column 2 → 2 (Naked Single)
  49. Row 4 / Column 2 → 1 (Full House)
  50. Row 6 / Column 8 → 7 (Full House)
  51. Row 4 / Column 1 → 7 (Full House)
  52. Row 1 / Column 1 → 1 (Full House)
  53. Row 4 / Column 8 → 2 (Full House)
  54. Row 3 / Column 5 → 6 (Naked Single)
  55. Row 1 / Column 3 → 2 (Naked Single)
  56. Row 3 / Column 3 → 9 (Full House)
  57. Row 3 / Column 9 → 2 (Full House)
  58. Row 2 / Column 5 → 7 (Naked Single)
  59. Row 1 / Column 5 → 5 (Full House)
  60. Row 1 / Column 9 → 7 (Full House)
  61. Row 2 / Column 7 → 1 (Naked Single)
  62. Row 2 / Column 9 → 6 (Full House)
  63. Row 7 / Column 9 → 1 (Full House)
  64. Row 7 / Column 3 → 7 (Full House)
  65. Row 9 / Column 7 → 5 (Naked Single)
  66. Row 8 / Column 7 → 7 (Full House)
  67. Row 8 / Column 3 → 5 (Full House)
  68. Row 9 / Column 3 → 1 (Full House)
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