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

This Sudoku Puzzle has 35 steps and it is solved using Locked Candidates Type 1 (Pointing), Hidden Single, 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. Locked Candidates Type 1 (Pointing): 9 in b2 => r45c4<>9
  2. Row 4 / Column 8 → 9 (Hidden Single)
  3. Row 4 / Column 7 → 3 (Hidden Single)
  4. Row 7 / Column 8 → 3 (Hidden Single)
  5. Row 7 / Column 6 → 4 (Naked Single)
  6. Row 7 / Column 7 → 1 (Full House)
  7. Row 6 / Column 6 → 9 (Naked Single)
  8. Row 8 / Column 4 → 6 (Naked Single)
  9. Row 8 / Column 6 → 3 (Full House)
  10. Row 5 / Column 6 → 6 (Full House)
  11. Row 2 / Column 7 → 8 (Naked Single)
  12. Row 1 / Column 7 → 7 (Naked Single)
  13. Row 1 / Column 8 → 1 (Full House)
  14. Row 8 / Column 7 → 4 (Full House)
  15. Row 8 / Column 9 → 7 (Full House)
  16. Row 1 / Column 3 → 9 (Naked Single)
  17. Row 1 / Column 4 → 8 (Full House)
  18. Row 3 / Column 4 → 9 (Full House)
  19. Row 5 / Column 8 → 8 (Naked Single)
  20. Row 6 / Column 8 → 7 (Full House)
  21. Row 3 / Column 3 → 7 (Naked Single)
  22. Row 3 / Column 2 → 8 (Full House)
  23. Row 9 / Column 3 → 4 (Naked Single)
  24. Row 2 / Column 3 → 1 (Full House)
  25. Row 9 / Column 2 → 7 (Full House)
  26. Row 2 / Column 1 → 4 (Full House)
  27. Row 6 / Column 2 → 4 (Naked Single)
  28. Row 5 / Column 2 → 9 (Full House)
  29. Row 5 / Column 1 → 1 (Naked Single)
  30. Row 5 / Column 4 → 4 (Full House)
  31. Row 4 / Column 4 → 1 (Full House)
  32. Row 6 / Column 9 → 1 (Naked Single)
  33. Row 6 / Column 1 → 8 (Full House)
  34. Row 4 / Column 1 → 7 (Full House)
  35. Row 4 / Column 9 → 4 (Full House)
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