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

This Sudoku Puzzle has 65 steps and it is solved using Locked Candidates Type 1 (Pointing), Naked Triple, Naked Single, Hidden Single, Locked Candidates Type 2 (Claiming), Hidden Rectangle, AIC, 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. Locked Candidates Type 1 (Pointing): 1 in b2 => r46c5<>1
  2. Locked Candidates Type 1 (Pointing): 3 in b7 => r7c79<>3
  3. Naked Triple: 2,3,4 in r2c156 => r2c237<>2, r2c27<>3, r2c2<>4
  4. Row 2 / Column 2 → 7 (Naked Single)
  5. Row 7 / Column 3 → 7 (Hidden Single)
  6. Locked Candidates Type 1 (Pointing): 3 in b3 => r3c1256<>3
  7. Locked Candidates Type 2 (Claiming): 2 in r2 => r13c5,r3c6<>2
  8. Hidden Rectangle: 2/3 in r3c79,r8c79 => r8c7<>2
  9. AIC: 5 5- r6c7 -2- r6c3 -1- r8c3 =1= r8c9 -1- r9c9 -5 => r6c9,r79c7<>5
  10. Locked Candidates Type 1 (Pointing): 5 in b6 => r2c7<>5
  11. Row 2 / Column 7 → 9 (Naked Single)
  12. Row 2 / Column 3 → 5 (Naked Single)
  13. Row 1 / Column 8 → 5 (Hidden Single)
  14. Row 3 / Column 3 → 9 (Hidden Single)
  15. Row 3 / Column 1 → 8 (Hidden Single)
  16. Row 8 / Column 3 → 8 (Hidden Single)
  17. Row 8 / Column 9 → 1 (Hidden Single)
  18. Row 9 / Column 9 → 5 (Naked Single)
  19. Row 9 / Column 2 → 1 (Hidden Single)
  20. Row 8 / Column 7 → 3 (Hidden Single)
  21. Row 3 / Column 9 → 3 (Hidden Single)
  22. Row 7 / Column 5 → 5 (Hidden Single)
  23. Row 3 / Column 5 → 1 (Hidden Single)
  24. Locked Candidates Type 1 (Pointing): 2 in b3 => r3c2<>2
  25. Locked Candidates Type 1 (Pointing): 6 in b7 => r7c47<>6
  26. Row 9 / Column 7 → 6 (Hidden Single)
  27. Row 9 / Column 6 → 8 (Naked Single)
  28. Row 9 / Column 5 → 9 (Naked Single)
  29. Row 9 / Column 8 → 7 (Full House)
  30. Row 3 / Column 8 → 2 (Naked Single)
  31. Row 3 / Column 7 → 7 (Full House)
  32. Row 8 / Column 8 → 4 (Naked Single)
  33. Row 5 / Column 8 → 8 (Naked Single)
  34. Row 7 / Column 8 → 9 (Full House)
  35. Row 7 / Column 9 → 2 (Naked Single)
  36. Row 6 / Column 9 → 4 (Full House)
  37. Row 7 / Column 7 → 8 (Full House)
  38. Row 7 / Column 4 → 4 (Naked Single)
  39. Row 4 / Column 5 → 8 (Hidden Single)
  40. Row 6 / Column 4 → 9 (Hidden Single)
  41. Row 2 / Column 5 → 4 (Hidden Single)
  42. Row 2 / Column 1 → 3 (Naked Single)
  43. Row 2 / Column 6 → 2 (Full House)
  44. Row 3 / Column 6 → 6 (Naked Single)
  45. Row 1 / Column 5 → 3 (Full House)
  46. Row 3 / Column 2 → 4 (Full House)
  47. Row 7 / Column 1 → 6 (Naked Single)
  48. Row 7 / Column 2 → 3 (Full House)
  49. Row 5 / Column 6 → 4 (Naked Single)
  50. Row 6 / Column 5 → 2 (Naked Single)
  51. Row 8 / Column 5 → 6 (Full House)
  52. Row 8 / Column 4 → 2 (Full House)
  53. Row 1 / Column 1 → 1 (Naked Single)
  54. Row 4 / Column 1 → 4 (Full House)
  55. Row 4 / Column 6 → 5 (Naked Single)
  56. Row 6 / Column 6 → 3 (Full House)
  57. Row 5 / Column 4 → 6 (Naked Single)
  58. Row 4 / Column 4 → 1 (Full House)
  59. Row 5 / Column 2 → 2 (Full House)
  60. Row 1 / Column 2 → 6 (Full House)
  61. Row 1 / Column 3 → 2 (Full House)
  62. Row 6 / Column 3 → 1 (Naked Single)
  63. Row 6 / Column 7 → 5 (Full House)
  64. Row 4 / Column 7 → 2 (Full House)
  65. Row 4 / Column 3 → 6 (Full House)
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