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

This Sudoku Puzzle has 56 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing) techniques.

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

Solution Steps:

  1. Row 3 / Column 1 → 8 (Naked Single)
  2. Row 6 / Column 3 → 8 (Hidden Single)
  3. Row 1 / Column 5 → 2 (Hidden Single)
  4. Row 3 / Column 3 → 2 (Hidden Single)
  5. Row 9 / Column 4 → 3 (Hidden Single)
  6. Row 9 / Column 7 → 2 (Hidden Single)
  7. Row 5 / Column 8 → 2 (Hidden Single)
  8. Row 6 / Column 5 → 3 (Hidden Single)
  9. Row 3 / Column 2 → 1 (Hidden Single)
  10. Row 9 / Column 5 → 9 (Hidden Single)
  11. Row 7 / Column 8 → 1 (Hidden Single)
  12. Row 9 / Column 3 → 1 (Hidden Single)
  13. Row 1 / Column 8 → 4 (Hidden Single)
  14. Row 1 / Column 1 → 3 (Naked Single)
  15. Row 1 / Column 3 → 7 (Naked Single)
  16. Row 2 / Column 3 → 4 (Full House)
  17. Row 8 / Column 3 → 3 (Naked Single)
  18. Row 9 / Column 6 → 5 (Hidden Single)
  19. Row 5 / Column 2 → 3 (Hidden Single)
  20. Row 7 / Column 7 → 3 (Hidden Single)
  21. Row 4 / Column 2 → 7 (Hidden Single)
  22. Locked Candidates Type 1 (Pointing): 5 in b2 => r4c4<>5
  23. Row 4 / Column 4 → 6 (Naked Single)
  24. Row 1 / Column 4 → 5 (Naked Single)
  25. Row 6 / Column 6 → 7 (Naked Single)
  26. Row 6 / Column 8 → 5 (Naked Single)
  27. Row 3 / Column 8 → 7 (Full House)
  28. Row 3 / Column 4 → 9 (Naked Single)
  29. Row 2 / Column 4 → 7 (Full House)
  30. Row 3 / Column 9 → 6 (Naked Single)
  31. Row 3 / Column 7 → 5 (Full House)
  32. Row 2 / Column 5 → 8 (Naked Single)
  33. Row 1 / Column 6 → 6 (Full House)
  34. Row 1 / Column 7 → 8 (Full House)
  35. Row 2 / Column 7 → 9 (Full House)
  36. Row 6 / Column 9 → 9 (Naked Single)
  37. Row 6 / Column 7 → 6 (Full House)
  38. Row 8 / Column 5 → 7 (Naked Single)
  39. Row 8 / Column 7 → 4 (Naked Single)
  40. Row 8 / Column 6 → 8 (Full House)
  41. Row 7 / Column 6 → 4 (Full House)
  42. Row 4 / Column 7 → 1 (Naked Single)
  43. Row 5 / Column 7 → 7 (Full House)
  44. Row 5 / Column 9 → 4 (Full House)
  45. Row 9 / Column 9 → 8 (Naked Single)
  46. Row 7 / Column 9 → 7 (Full House)
  47. Row 9 / Column 2 → 4 (Full House)
  48. Row 7 / Column 2 → 8 (Full House)
  49. Row 4 / Column 5 → 5 (Naked Single)
  50. Row 5 / Column 5 → 1 (Full House)
  51. Row 5 / Column 1 → 5 (Naked Single)
  52. Row 5 / Column 3 → 6 (Full House)
  53. Row 4 / Column 3 → 9 (Naked Single)
  54. Row 4 / Column 1 → 4 (Full House)
  55. Row 7 / Column 1 → 9 (Full House)
  56. Row 7 / Column 3 → 5 (Full House)
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