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

This Sudoku Puzzle has 66 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Naked Pair, Hidden Pair techniques.

Naked Single Explanation
Hidden Single Explanation
Hidden Pair Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 6 / Column 5 → 2 (Hidden Single)
  2. Row 9 / Column 5 → 4 (Naked Single)
  3. Row 9 / Column 4 → 6 (Naked Single)
  4. Row 1 / Column 6 → 1 (Hidden Single)
  5. Row 8 / Column 6 → 5 (Hidden Single)
  6. Row 9 / Column 7 → 8 (Hidden Single)
  7. Row 3 / Column 4 → 4 (Hidden Single)
  8. Row 7 / Column 6 → 2 (Hidden Single)
  9. Row 8 / Column 1 → 2 (Hidden Single)
  10. Row 3 / Column 8 → 2 (Hidden Single)
  11. Row 9 / Column 9 → 2 (Hidden Single)
  12. Row 2 / Column 3 → 2 (Hidden Single)
  13. Row 7 / Column 7 → 1 (Hidden Single)
  14. Row 3 / Column 3 → 8 (Hidden Single)
  15. Row 7 / Column 4 → 3 (Hidden Single)
  16. Row 8 / Column 4 → 9 (Full House)
  17. Row 8 / Column 7 → 3 (Hidden Single)
  18. Locked Candidates Type 1 (Pointing): 9 in b2 => r45c6<>9
  19. Locked Candidates Type 1 (Pointing): 4 in b9 => r145c8<>4
  20. Row 1 / Column 7 → 4 (Hidden Single)
  21. Locked Candidates Type 1 (Pointing): 6 in b9 => r145c8<>6
  22. Locked Candidates Type 1 (Pointing): 6 in b3 => r2c2<>6
  23. Naked Pair: 3,9 in r3c69 => r3c2<>3, r3c7<>9
  24. Naked Pair: 5,7 in r1c8,r3c7 => r2c7<>7
  25. Hidden Pair: 3,4 in r4c3,r5c2 => r4c3,r5c2<>1, r4c3,r5c2<>6, r4c3<>9, r5c2<>5
  26. Row 4 / Column 9 → 1 (Hidden Single)
  27. Row 5 / Column 4 → 1 (Hidden Single)
  28. Row 4 / Column 3 → 4 (Hidden Single)
  29. Row 5 / Column 2 → 3 (Naked Single)
  30. Row 8 / Column 3 → 6 (Naked Single)
  31. Row 8 / Column 8 → 4 (Full House)
  32. Row 7 / Column 8 → 6 (Full House)
  33. Row 2 / Column 2 → 7 (Naked Single)
  34. Row 5 / Column 5 → 9 (Naked Single)
  35. Row 7 / Column 3 → 9 (Naked Single)
  36. Row 2 / Column 4 → 8 (Naked Single)
  37. Row 6 / Column 4 → 7 (Full House)
  38. Row 3 / Column 2 → 5 (Naked Single)
  39. Row 7 / Column 2 → 4 (Naked Single)
  40. Row 7 / Column 1 → 7 (Full House)
  41. Row 4 / Column 5 → 3 (Naked Single)
  42. Row 1 / Column 5 → 7 (Full House)
  43. Row 1 / Column 1 → 6 (Naked Single)
  44. Row 1 / Column 3 → 3 (Full House)
  45. Row 1 / Column 8 → 5 (Full House)
  46. Row 3 / Column 7 → 7 (Naked Single)
  47. Row 9 / Column 2 → 1 (Naked Single)
  48. Row 6 / Column 2 → 6 (Full House)
  49. Row 9 / Column 3 → 5 (Full House)
  50. Row 6 / Column 3 → 1 (Full House)
  51. Row 5 / Column 8 → 8 (Naked Single)
  52. Row 4 / Column 8 → 7 (Full House)
  53. Row 6 / Column 9 → 9 (Naked Single)
  54. Row 5 / Column 1 → 5 (Naked Single)
  55. Row 5 / Column 6 → 6 (Naked Single)
  56. Row 4 / Column 6 → 8 (Full House)
  57. Row 5 / Column 9 → 4 (Full House)
  58. Row 3 / Column 9 → 3 (Naked Single)
  59. Row 2 / Column 9 → 6 (Full House)
  60. Row 3 / Column 6 → 9 (Full House)
  61. Row 2 / Column 7 → 9 (Full House)
  62. Row 2 / Column 6 → 3 (Full House)
  63. Row 4 / Column 7 → 6 (Naked Single)
  64. Row 6 / Column 7 → 5 (Full House)
  65. Row 6 / Column 1 → 8 (Full House)
  66. Row 4 / Column 1 → 9 (Full House)
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