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

This Sudoku Puzzle has 55 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, Naked Triple, Full House, Give Up techniques.

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

Solution Steps:

  1. Row 9 / Column 6 → 1 (Naked Single)
  2. Row 2 / Column 9 → 9 (Hidden Single)
  3. Row 4 / Column 2 → 1 (Hidden Single)
  4. Row 2 / Column 5 → 5 (Hidden Single)
  5. Row 7 / Column 7 → 9 (Hidden Single)
  6. Row 8 / Column 8 → 5 (Hidden Single)
  7. Row 6 / Column 4 → 1 (Hidden Single)
  8. Row 7 / Column 3 → 1 (Hidden Single)
  9. Row 8 / Column 9 → 1 (Hidden Single)
  10. Locked Candidates Type 1 (Pointing): 8 in b2 => r45c4<>8
  11. Locked Candidates Type 1 (Pointing): 3 in b3 => r7c8<>3
  12. Locked Candidates Type 1 (Pointing): 6 in b4 => r5c59<>6
  13. Naked Pair: 5,8 in r6c16 => r6c8<>8
  14. Naked Triple: 2,5,8 in r246c1 => r3c1<>2, r3c1<>5, r3c1<>8
  15. Row 3 / Column 2 → 5 (Hidden Single)
  16. Row 9 / Column 3 → 5 (Hidden Single)
  17. Row 3 / Column 1 → 7 (Hidden Single)
  18. Row 8 / Column 1 → 4 (Naked Single)
  19. Row 1 / Column 2 → 4 (Hidden Single)
  20. Row 5 / Column 4 → 4 (Hidden Single)
  21. Row 6 / Column 5 → 6 (Naked Single)
  22. Row 6 / Column 8 → 4 (Naked Single)
  23. Row 7 / Column 8 → 8 (Naked Single)
  24. Row 3 / Column 7 → 4 (Hidden Single)
  25. Row 4 / Column 9 → 6 (Hidden Single)
  26. Row 3 / Column 9 → 8 (Naked Single)
  27. Row 3 / Column 4 → 2 (Naked Single)
  28. Row 3 / Column 8 → 6 (Full House)
  29. Row 5 / Column 9 → 7 (Naked Single)
  30. Row 1 / Column 5 → 9 (Naked Single)
  31. Row 1 / Column 4 → 8 (Full House)
  32. Row 4 / Column 4 → 3 (Naked Single)
  33. Row 8 / Column 4 → 9 (Full House)
  34. Row 5 / Column 5 → 2 (Naked Single)
  35. Row 1 / Column 3 → 3 (Naked Single)
  36. Row 1 / Column 8 → 2 (Full House)
  37. Row 2 / Column 8 → 3 (Full House)
  38. Row 8 / Column 6 → 7 (Naked Single)
  39. Row 8 / Column 2 → 3 (Full House)
  40. Row 4 / Column 5 → 7 (Naked Single)
  41. Row 7 / Column 2 → 7 (Naked Single)
  42. Row 9 / Column 2 → 8 (Full House)
  43. Row 5 / Column 2 → 6 (Naked Single)
  44. Row 2 / Column 2 → 2 (Full House)
  45. Row 5 / Column 3 → 8 (Naked Single)
  46. Row 2 / Column 3 → 6 (Full House)
  47. Row 2 / Column 1 → 8 (Full House)
  48. Row 5 / Column 7 → 5 (Naked Single)
  49. Row 4 / Column 7 → 8 (Full House)
  50. Row 5 / Column 6 → 9 (Full House)
  51. Row 6 / Column 1 → 5 (Naked Single)
  52. Row 4 / Column 1 → 2 (Full House)
  53. Row 4 / Column 6 → 5 (Full House)
  54. Row 6 / Column 6 → 8 (Full House)
  55. Give Up: Don't know how to proceed!
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