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

This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Locked Triple, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Locked Pair, Full House, Hidden Pair techniques.

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

Solution Steps:

  1. Row 1 / Column 7 → 5 (Hidden Single)
  2. Row 9 / Column 7 → 6 (Hidden Single)
  3. Locked Triple: 1,3,9 in r456c3 => r189c3,r46c1,r5c2<>3, r18c3,r46c1,r5c2<>9, r46c1,r5c2,r89c3<>1
  4. Row 8 / Column 3 → 2 (Naked Single)
  5. Locked Candidates Type 1 (Pointing): 5 in b4 => r79c1<>5
  6. Locked Candidates Type 2 (Claiming): 2 in c7 => r4c9,r5c8<>2
  7. Locked Candidates Type 2 (Claiming): 8 in c7 => r46c9<>8
  8. Locked Candidates Type 2 (Claiming): 9 in c7 => r46c9,r5c8<>9
  9. Naked Triple: 7,8,9 in r1c3,r2c12 => r13c1<>7, r1c12,r3c12<>9, r13c2<>8
  10. Locked Candidates Type 1 (Pointing): 9 in b1 => r2c89<>9
  11. Locked Pair: 7,8 in r2c89 => r1c89,r2c1,r3c89<>7, r1c89,r2c2,r3c89<>8
  12. Row 2 / Column 1 → 9 (Naked Single)
  13. Row 2 / Column 2 → 9 (Naked Single)
  14. Row 9 / Column 1 → 7 (Hidden Single)
  15. Row 9 / Column 3 → 8 (Naked Single)
  16. Row 1 / Column 3 → 7 (Naked Single)
  17. Row 8 / Column 9 → 9 (Hidden Single)
  18. Row 1 / Column 4 → 8 (Hidden Single)
  19. Row 3 / Column 5 → 6 (Naked Single)
  20. Row 1 / Column 6 → 9 (Naked Single)
  21. Row 3 / Column 4 → 7 (Full House)
  22. Row 3 / Column 6 → 7 (Full House)
  23. Row 1 / Column 8 → 2 (Naked Single)
  24. Row 3 / Column 8 → 9 (Naked Single)
  25. Row 3 / Column 9 → 4 (Naked Single)
  26. Row 1 / Column 9 → 6 (Naked Single)
  27. Row 3 / Column 2 → 1 (Naked Single)
  28. Row 3 / Column 1 → 2 (Naked Single)
  29. Row 8 / Column 2 → 3 (Naked Single)
  30. Row 8 / Column 1 → 1 (Full House)
  31. Row 1 / Column 2 → 4 (Naked Single)
  32. Row 1 / Column 1 → 3 (Full House)
  33. Row 9 / Column 2 → 5 (Naked Single)
  34. Row 7 / Column 1 → 6 (Full House)
  35. Row 7 / Column 2 → 6 (Full House)
  36. Row 5 / Column 2 → 6 (Naked Single)
  37. Row 4 / Column 1 → 5 (Naked Single)
  38. Row 6 / Column 1 → 4 (Full House)
  39. Row 5 / Column 8 → 7 (Hidden Single)
  40. Row 2 / Column 8 → 8 (Naked Single)
  41. Row 2 / Column 9 → 7 (Full House)
  42. Row 4 / Column 6 → 6 (Hidden Single)
  43. Row 7 / Column 9 → 8 (Hidden Single)
  44. Row 9 / Column 9 → 2 (Hidden Single)
  45. Hidden Pair: 4,6 in r5c46 => r5c46<>1, r5c4<>2, r5c4<>9, r5c6<>3
  46. Row 5 / Column 4 → 4 (Naked Single)
  47. Row 5 / Column 6 → 4 (Naked Single)
  48. Row 9 / Column 4 → 1 (Naked Single)
  49. Row 9 / Column 6 → 3 (Full House)
  50. Row 9 / Column 8 → 3 (Full House)
  51. Row 7 / Column 6 → 5 (Naked Single)
  52. Row 7 / Column 4 → 2 (Full House)
  53. Row 7 / Column 5 → 2 (Full House)
  54. Row 7 / Column 8 → 1 (Naked Single)
  55. Row 6 / Column 6 → 1 (Naked Single)
  56. Row 4 / Column 4 → 9 (Naked Single)
  57. Row 6 / Column 4 → 5 (Full House)
  58. Row 5 / Column 5 → 3 (Naked Single)
  59. Row 6 / Column 9 → 3 (Naked Single)
  60. Row 4 / Column 9 → 1 (Full House)
  61. Row 4 / Column 5 → 8 (Naked Single)
  62. Row 6 / Column 5 → 8 (Naked Single)
  63. Row 6 / Column 3 → 9 (Naked Single)
  64. Row 4 / Column 3 → 3 (Naked Single)
  65. Row 4 / Column 7 → 2 (Full House)
  66. Row 6 / Column 7 → 9 (Full House)
  67. Row 5 / Column 3 → 1 (Full House)
  68. Row 5 / Column 7 → 9 (Full House)
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