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

This Sudoku Puzzle has 69 steps and it is solved using Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Naked Triple, Naked Single, 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 3 / Column 1 → 9 (Hidden Single)
  2. Row 6 / Column 6 → 9 (Hidden Single)
  3. Row 2 / Column 2 → 6 (Hidden Single)
  4. Row 2 / Column 8 → 7 (Hidden Single)
  5. Row 5 / Column 3 → 2 (Hidden Single)
  6. Row 5 / Column 8 → 4 (Hidden Single)
  7. Row 9 / Column 3 → 7 (Hidden Single)
  8. Row 5 / Column 7 → 6 (Hidden Single)
  9. Row 4 / Column 7 → 5 (Hidden Single)
  10. Locked Pair: 2,8 in r6c78 => r46c9,r6c2<>8, r46c9<>2
  11. Locked Candidates Type 1 (Pointing): 4 in b1 => r7c3<>4
  12. Locked Candidates Type 1 (Pointing): 8 in b4 => r89c2<>8
  13. Locked Pair: 4,5 in r9c12 => r78c3,r8c2,r9c56<>5, r9c6<>4
  14. Locked Candidates Type 1 (Pointing): 3 in b5 => r5c12<>3
  15. Locked Candidates Type 1 (Pointing): 3 in b9 => r1c9<>3
  16. Locked Candidates Type 2 (Claiming): 5 in c3 => r2c1<>5
  17. Locked Candidates Type 2 (Claiming): 8 in c9 => r78c8,r9c7<>8
  18. Naked Pair: 1,3 in r68c2 => r45c2<>1
  19. Naked Pair: 1,8 in r58c4 => r17c4<>1, r7c4<>8
  20. Naked Triple: 1,3,8 in r8c234 => r8c5<>1, r8c59<>8, r8c9<>3
  21. Row 8 / Column 9 → 6 (Naked Single)
  22. Row 1 / Column 9 → 2 (Naked Single)
  23. Row 1 / Column 4 → 4 (Naked Single)
  24. Row 9 / Column 9 → 8 (Naked Single)
  25. Row 7 / Column 4 → 2 (Naked Single)
  26. Row 7 / Column 9 → 3 (Naked Single)
  27. Row 7 / Column 8 → 5 (Naked Single)
  28. Row 9 / Column 6 → 6 (Naked Single)
  29. Row 8 / Column 8 → 9 (Naked Single)
  30. Row 9 / Column 7 → 2 (Full House)
  31. Row 9 / Column 5 → 9 (Naked Single)
  32. Row 1 / Column 8 → 6 (Naked Single)
  33. Row 8 / Column 5 → 5 (Naked Single)
  34. Row 6 / Column 7 → 8 (Naked Single)
  35. Row 3 / Column 8 → 8 (Naked Single)
  36. Row 6 / Column 8 → 2 (Full House)
  37. Row 2 / Column 7 → 3 (Naked Single)
  38. Row 1 / Column 7 → 9 (Full House)
  39. Row 3 / Column 6 → 3 (Naked Single)
  40. Row 2 / Column 1 → 1 (Naked Single)
  41. Row 1 / Column 5 → 1 (Naked Single)
  42. Row 3 / Column 3 → 4 (Naked Single)
  43. Row 3 / Column 5 → 6 (Full House)
  44. Row 2 / Column 3 → 5 (Naked Single)
  45. Row 1 / Column 3 → 3 (Full House)
  46. Row 1 / Column 6 → 5 (Full House)
  47. Row 7 / Column 5 → 8 (Naked Single)
  48. Row 2 / Column 5 → 2 (Naked Single)
  49. Row 2 / Column 6 → 8 (Full House)
  50. Row 7 / Column 3 → 1 (Naked Single)
  51. Row 7 / Column 6 → 4 (Full House)
  52. Row 8 / Column 4 → 1 (Full House)
  53. Row 8 / Column 3 → 8 (Full House)
  54. Row 8 / Column 2 → 3 (Full House)
  55. Row 5 / Column 4 → 8 (Full House)
  56. Row 4 / Column 5 → 7 (Naked Single)
  57. Row 5 / Column 5 → 3 (Full House)
  58. Row 5 / Column 6 → 1 (Naked Single)
  59. Row 4 / Column 6 → 2 (Full House)
  60. Row 6 / Column 2 → 1 (Naked Single)
  61. Row 5 / Column 2 → 5 (Naked Single)
  62. Row 5 / Column 1 → 7 (Full House)
  63. Row 4 / Column 1 → 4 (Naked Single)
  64. Row 4 / Column 9 → 1 (Naked Single)
  65. Row 6 / Column 9 → 7 (Full House)
  66. Row 6 / Column 1 → 3 (Full House)
  67. Row 4 / Column 2 → 8 (Full House)
  68. Row 9 / Column 2 → 4 (Full House)
  69. Row 9 / Column 1 → 5 (Full House)
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