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

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

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

Solution Steps:

  1. Row 7 / Column 9 → 2 (Hidden Single)
  2. Row 8 / Column 9 → 6 (Hidden Single)
  3. Locked Pair: 5,8 in r7c23 => r7c56<>5, r7c568,r8c123,r9c1<>8
  4. Locked Pair: 4,7 in r8c23 => r8c18,r9c1<>7, r8c46<>4
  5. Locked Triple: 2,6,7 in r1c456 => r1c378,r2c5<>7, r1c7,r23c4<>2, r1c7,r2c45,r3c4<>6
  6. Locked Candidates Type 2 (Claiming): 1 in r4 => r5c45,r6c45<>1
  7. Locked Candidates Type 2 (Claiming): 5 in r4 => r5c456,r6c456<>5
  8. Locked Candidates Type 2 (Claiming): 7 in r4 => r5c56,r6c56<>7
  9. Naked Triple: 1,7,9 in r156c7 => r239c7<>7, r39c7<>1, r9c7<>9
  10. Row 9 / Column 7 → 3 (Naked Single)
  11. Row 7 / Column 8 → 9 (Naked Single)
  12. Row 9 / Column 1 → 9 (Naked Single)
  13. Row 8 / Column 1 → 3 (Naked Single)
  14. Row 8 / Column 6 → 8 (Naked Single)
  15. Row 8 / Column 8 → 1 (Naked Single)
  16. Row 1 / Column 8 → 4 (Naked Single)
  17. Row 8 / Column 4 → 9 (Naked Single)
  18. Row 9 / Column 9 → 7 (Naked Single)
  19. Row 9 / Column 8 → 8 (Full House)
  20. Row 1 / Column 3 → 1 (Naked Single)
  21. Row 2 / Column 9 → 5 (Naked Single)
  22. Row 1 / Column 7 → 9 (Naked Single)
  23. Row 3 / Column 9 → 1 (Naked Single)
  24. Row 6 / Column 9 → 9 (Full House)
  25. Row 6 / Column 5 → 8 (Naked Single)
  26. Row 2 / Column 5 → 3 (Naked Single)
  27. Row 2 / Column 4 → 8 (Naked Single)
  28. Row 2 / Column 8 → 7 (Naked Single)
  29. Row 7 / Column 5 → 6 (Naked Single)
  30. Row 3 / Column 4 → 5 (Naked Single)
  31. Row 3 / Column 8 → 3 (Naked Single)
  32. Row 5 / Column 8 → 5 (Full House)
  33. Row 1 / Column 5 → 7 (Naked Single)
  34. Row 5 / Column 5 → 9 (Naked Single)
  35. Row 7 / Column 6 → 3 (Naked Single)
  36. Row 4 / Column 4 → 1 (Naked Single)
  37. Row 4 / Column 5 → 5 (Naked Single)
  38. Row 4 / Column 6 → 7 (Full House)
  39. Row 9 / Column 5 → 1 (Full House)
  40. Row 9 / Column 4 → 4 (Naked Single)
  41. Row 9 / Column 6 → 5 (Full House)
  42. Row 6 / Column 4 → 2 (Naked Single)
  43. Row 1 / Column 4 → 6 (Naked Single)
  44. Row 1 / Column 6 → 2 (Full House)
  45. Row 5 / Column 4 → 3 (Full House)
  46. Row 5 / Column 6 → 6 (Naked Single)
  47. Row 6 / Column 6 → 4 (Full House)
  48. Row 6 / Column 1 → 7 (Naked Single)
  49. Row 5 / Column 3 → 8 (Naked Single)
  50. Row 6 / Column 7 → 1 (Naked Single)
  51. Row 5 / Column 7 → 7 (Full House)
  52. Row 6 / Column 2 → 5 (Full House)
  53. Row 3 / Column 3 → 7 (Naked Single)
  54. Row 5 / Column 1 → 2 (Naked Single)
  55. Row 5 / Column 2 → 1 (Full House)
  56. Row 7 / Column 3 → 5 (Naked Single)
  57. Row 7 / Column 2 → 8 (Full House)
  58. Row 8 / Column 3 → 4 (Full House)
  59. Row 8 / Column 2 → 7 (Full House)
  60. Row 2 / Column 1 → 6 (Naked Single)
  61. Row 3 / Column 1 → 8 (Full House)
  62. Row 3 / Column 2 → 2 (Naked Single)
  63. Row 2 / Column 2 → 4 (Full House)
  64. Row 2 / Column 7 → 2 (Full House)
  65. Row 3 / Column 7 → 6 (Full House)
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