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

This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Naked Triple, Full House techniques.

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

Solution Steps:

  1. Row 6 / Column 4 → 4 (Hidden Single)
  2. Row 3 / Column 3 → 2 (Hidden Single)
  3. Row 5 / Column 4 → 8 (Hidden Single)
  4. Row 6 / Column 7 → 1 (Hidden Single)
  5. Row 4 / Column 5 → 2 (Hidden Single)
  6. Row 4 / Column 9 → 9 (Naked Single)
  7. Row 7 / Column 6 → 4 (Hidden Single)
  8. Row 2 / Column 7 → 2 (Hidden Single)
  9. Row 5 / Column 1 → 9 (Hidden Single)
  10. Locked Candidates Type 1 (Pointing): 9 in b3 => r89c8<>9
  11. Locked Candidates Type 2 (Claiming): 1 in r3 => r1c6,r2c4<>1
  12. Naked Pair: 3,9 in r2c48 => r2c1259<>3, r2c5<>9
  13. Naked Triple: 3,5,6 in r145c6 => r38c6<>3, r38c6<>5
  14. Naked Triple: 1,7,9 in r8c6,r9c45 => r7c4,r8c5<>9, r8c5<>7
  15. Row 8 / Column 3 → 9 (Hidden Single)
  16. Row 7 / Column 7 → 9 (Hidden Single)
  17. Row 1 / Column 3 → 1 (Hidden Single)
  18. Row 4 / Column 3 → 8 (Hidden Single)
  19. Row 2 / Column 9 → 1 (Hidden Single)
  20. Row 1 / Column 9 → 4 (Hidden Single)
  21. Locked Candidates Type 1 (Pointing): 3 in b3 => r8c8<>3
  22. Locked Candidates Type 1 (Pointing): 6 in b9 => r9c12<>6
  23. Naked Triple: 5,6,7 in r7c23,r8c1 => r8c2<>5, r89c2,r9c1<>7
  24. Row 9 / Column 1 → 4 (Naked Single)
  25. Row 2 / Column 2 → 4 (Hidden Single)
  26. Locked Candidates Type 1 (Pointing): 7 in b1 => r68c1<>7
  27. Row 8 / Column 1 → 5 (Naked Single)
  28. Row 8 / Column 5 → 3 (Naked Single)
  29. Row 7 / Column 4 → 5 (Naked Single)
  30. Row 6 / Column 1 → 3 (Hidden Single)
  31. Row 3 / Column 1 → 7 (Naked Single)
  32. Row 2 / Column 1 → 6 (Full House)
  33. Row 1 / Column 2 → 3 (Full House)
  34. Row 3 / Column 6 → 1 (Naked Single)
  35. Row 2 / Column 5 → 7 (Naked Single)
  36. Row 3 / Column 4 → 3 (Naked Single)
  37. Row 8 / Column 6 → 7 (Naked Single)
  38. Row 9 / Column 5 → 9 (Naked Single)
  39. Row 9 / Column 4 → 1 (Full House)
  40. Row 2 / Column 4 → 9 (Full House)
  41. Row 2 / Column 8 → 3 (Full House)
  42. Row 8 / Column 9 → 2 (Naked Single)
  43. Row 9 / Column 2 → 8 (Naked Single)
  44. Row 5 / Column 9 → 7 (Naked Single)
  45. Row 7 / Column 9 → 3 (Full House)
  46. Row 8 / Column 8 → 8 (Naked Single)
  47. Row 8 / Column 2 → 1 (Full House)
  48. Row 9 / Column 7 → 6 (Naked Single)
  49. Row 9 / Column 8 → 7 (Full House)
  50. Row 3 / Column 8 → 5 (Naked Single)
  51. Row 3 / Column 7 → 8 (Full House)
  52. Row 4 / Column 7 → 5 (Full House)
  53. Row 1 / Column 8 → 9 (Full House)
  54. Row 6 / Column 8 → 6 (Naked Single)
  55. Row 5 / Column 8 → 2 (Full House)
  56. Row 4 / Column 2 → 6 (Naked Single)
  57. Row 4 / Column 6 → 3 (Full House)
  58. Row 6 / Column 3 → 7 (Naked Single)
  59. Row 6 / Column 5 → 5 (Full House)
  60. Row 5 / Column 2 → 5 (Full House)
  61. Row 7 / Column 2 → 7 (Full House)
  62. Row 7 / Column 3 → 6 (Full House)
  63. Row 1 / Column 5 → 6 (Full House)
  64. Row 5 / Column 6 → 6 (Full House)
  65. Row 1 / Column 6 → 5 (Full House)
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