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.

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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