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

This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Naked Single, Locked Pair, Locked Candidates Type 1 (Pointing), Full House, Locked Candidates Type 2 (Claiming), Naked Triple 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 5 / Column 5 → 5 (Hidden Single)
  2. Row 7 / Column 9 → 5 (Hidden Single)
  3. Row 3 / Column 4 → 5 (Hidden Single)
  4. Row 7 / Column 6 → 1 (Hidden Single)
  5. Row 9 / Column 9 → 6 (Hidden Single)
  6. Row 6 / Column 9 → 2 (Naked Single)
  7. Locked Pair: 3,7 in r79c2 => r23c2,r8c13,r9c13<>3, r3c2,r89c1<>7
  8. Locked Pair: 1,9 in r8c13 => r8c4789,r9c13<>9
  9. Row 8 / Column 9 → 4 (Naked Single)
  10. Locked Candidates Type 1 (Pointing): 1 in b6 => r3c8<>1
  11. Locked Candidates Type 1 (Pointing): 9 in b9 => r235c8<>9
  12. Row 5 / Column 8 → 1 (Naked Single)
  13. Row 4 / Column 8 → 7 (Naked Single)
  14. Row 6 / Column 7 → 6 (Naked Single)
  15. Row 5 / Column 7 → 9 (Full House)
  16. Row 3 / Column 2 → 1 (Hidden Single)
  17. Row 3 / Column 9 → 9 (Naked Single)
  18. Row 1 / Column 9 → 1 (Full House)
  19. Row 8 / Column 7 → 7 (Hidden Single)
  20. Row 8 / Column 4 → 3 (Naked Single)
  21. Row 4 / Column 4 → 6 (Naked Single)
  22. Row 8 / Column 8 → 2 (Naked Single)
  23. Row 5 / Column 1 → 6 (Hidden Single)
  24. Row 7 / Column 5 → 6 (Hidden Single)
  25. Locked Candidates Type 1 (Pointing): 3 in b5 => r123c6<>3
  26. Locked Candidates Type 1 (Pointing): 3 in b9 => r23c8<>3
  27. Locked Candidates Type 2 (Claiming): 3 in r1 => r2c13,r3c13<>3
  28. Naked Triple: 2,3,4 in r2c257 => r2c168<>4, r2c3<>2
  29. Row 2 / Column 8 → 8 (Naked Single)
  30. Row 3 / Column 8 → 4 (Naked Single)
  31. Row 3 / Column 1 → 7 (Naked Single)
  32. Row 3 / Column 5 → 3 (Naked Single)
  33. Row 2 / Column 5 → 4 (Naked Single)
  34. Row 9 / Column 5 → 7 (Full House)
  35. Row 3 / Column 7 → 2 (Naked Single)
  36. Row 2 / Column 7 → 3 (Full House)
  37. Row 2 / Column 2 → 2 (Naked Single)
  38. Row 7 / Column 4 → 9 (Naked Single)
  39. Row 9 / Column 6 → 4 (Full House)
  40. Row 9 / Column 2 → 3 (Naked Single)
  41. Row 3 / Column 3 → 6 (Naked Single)
  42. Row 3 / Column 6 → 8 (Full House)
  43. Row 5 / Column 2 → 4 (Naked Single)
  44. Row 5 / Column 6 → 2 (Full House)
  45. Row 7 / Column 2 → 7 (Full House)
  46. Row 7 / Column 8 → 3 (Full House)
  47. Row 9 / Column 8 → 9 (Full House)
  48. Row 1 / Column 4 → 7 (Naked Single)
  49. Row 6 / Column 4 → 4 (Full House)
  50. Row 4 / Column 6 → 3 (Naked Single)
  51. Row 6 / Column 6 → 7 (Full House)
  52. Row 1 / Column 6 → 9 (Naked Single)
  53. Row 2 / Column 6 → 6 (Full House)
  54. Row 4 / Column 1 → 1 (Naked Single)
  55. Row 4 / Column 3 → 2 (Full House)
  56. Row 1 / Column 3 → 3 (Naked Single)
  57. Row 1 / Column 1 → 4 (Full House)
  58. Row 8 / Column 1 → 9 (Naked Single)
  59. Row 8 / Column 3 → 1 (Full House)
  60. Row 6 / Column 3 → 8 (Naked Single)
  61. Row 6 / Column 1 → 3 (Full House)
  62. Row 2 / Column 1 → 5 (Naked Single)
  63. Row 2 / Column 3 → 9 (Full House)
  64. Row 9 / Column 3 → 5 (Full House)
  65. Row 9 / Column 1 → 8 (Full House)
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