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

This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Single, Locked Pair, Full House, Locked Candidates Type 2 (Claiming), Naked Pair, Naked Triple, Skyscraper 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 4 / Column 7 → 3 (Hidden Single)
  2. Row 5 / Column 1 → 9 (Hidden Single)
  3. Row 2 / Column 3 → 9 (Hidden Single)
  4. Row 9 / Column 9 → 9 (Hidden Single)
  5. Locked Candidates Type 1 (Pointing): 6 in b1 => r45c2<>6
  6. Locked Candidates Type 1 (Pointing): 4 in b2 => r1c78<>4
  7. Locked Candidates Type 1 (Pointing): 5 in b9 => r8c1356<>5
  8. Row 8 / Column 3 → 7 (Naked Single)
  9. Locked Pair: 4,5 in r8c79 => r79c8,r8c146<>4
  10. Row 2 / Column 8 → 4 (Hidden Single)
  11. Row 2 / Column 7 → 1 (Naked Single)
  12. Row 2 / Column 1 → 3 (Naked Single)
  13. Row 2 / Column 9 → 6 (Naked Single)
  14. Row 2 / Column 5 → 8 (Full House)
  15. Row 8 / Column 1 → 8 (Naked Single)
  16. Row 3 / Column 9 → 5 (Naked Single)
  17. Row 3 / Column 7 → 9 (Naked Single)
  18. Row 8 / Column 9 → 4 (Naked Single)
  19. Row 1 / Column 7 → 7 (Naked Single)
  20. Row 8 / Column 7 → 5 (Naked Single)
  21. Row 6 / Column 7 → 4 (Full House)
  22. Row 1 / Column 8 → 2 (Naked Single)
  23. Row 3 / Column 8 → 8 (Full House)
  24. Row 5 / Column 8 → 6 (Hidden Single)
  25. Row 4 / Column 4 → 8 (Hidden Single)
  26. Row 9 / Column 6 → 8 (Hidden Single)
  27. Row 1 / Column 4 → 9 (Hidden Single)
  28. Row 1 / Column 6 → 4 (Hidden Single)
  29. Locked Candidates Type 2 (Claiming): 3 in r8 => r79c4,r9c5<>3
  30. Naked Pair: 1,5 in r7c36 => r7c24<>1, r7c2<>5
  31. Naked Pair: 1,5 in r57c6 => r3c6<>1
  32. Naked Triple: 1,4,7 in r579c4 => r36c4<>1, r6c4<>7
  33. Locked Candidates Type 1 (Pointing): 1 in b2 => r469c5<>1
  34. Locked Candidates Type 1 (Pointing): 1 in b5 => r5c2<>1
  35. Skyscraper: 5 in r5c2,r7c3 (connected by r57c6) => r6c3,r9c2<>5
  36. Row 7 / Column 3 → 5 (Hidden Single)
  37. Row 7 / Column 6 → 1 (Naked Single)
  38. Row 5 / Column 6 → 5 (Naked Single)
  39. Row 5 / Column 2 → 7 (Naked Single)
  40. Row 5 / Column 4 → 1 (Full House)
  41. Row 9 / Column 5 → 5 (Hidden Single)
  42. Row 1 / Column 2 → 5 (Hidden Single)
  43. Row 1 / Column 1 → 1 (Naked Single)
  44. Row 1 / Column 5 → 6 (Full House)
  45. Row 3 / Column 2 → 6 (Full House)
  46. Row 9 / Column 1 → 4 (Naked Single)
  47. Row 3 / Column 6 → 2 (Naked Single)
  48. Row 8 / Column 6 → 6 (Full House)
  49. Row 4 / Column 1 → 2 (Naked Single)
  50. Row 6 / Column 1 → 5 (Full House)
  51. Row 7 / Column 2 → 3 (Naked Single)
  52. Row 9 / Column 2 → 1 (Full House)
  53. Row 4 / Column 2 → 4 (Full House)
  54. Row 9 / Column 4 → 7 (Naked Single)
  55. Row 9 / Column 8 → 3 (Full House)
  56. Row 7 / Column 8 → 7 (Full House)
  57. Row 7 / Column 4 → 4 (Full House)
  58. Row 3 / Column 4 → 3 (Naked Single)
  59. Row 3 / Column 5 → 1 (Full House)
  60. Row 4 / Column 5 → 7 (Naked Single)
  61. Row 8 / Column 4 → 2 (Naked Single)
  62. Row 6 / Column 4 → 6 (Full House)
  63. Row 6 / Column 5 → 2 (Full House)
  64. Row 8 / Column 5 → 3 (Full House)
  65. Row 4 / Column 9 → 1 (Naked Single)
  66. Row 4 / Column 3 → 6 (Full House)
  67. Row 6 / Column 3 → 1 (Full House)
  68. Row 6 / Column 9 → 7 (Full House)
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