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

This Sudoku Puzzle has 39 steps and it is solved using Locked Candidates Type 1 (Pointing), Hidden Single, Full House, Naked Single 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): 5 in b1 => r4c1<>5
  2. Row 4 / Column 3 → 5 (Hidden Single)
  3. Row 5 / Column 3 → 9 (Full House)
  4. Row 4 / Column 6 → 9 (Hidden Single)
  5. Row 3 / Column 5 → 9 (Hidden Single)
  6. Row 3 / Column 1 → 5 (Naked Single)
  7. Row 3 / Column 6 → 8 (Full House)
  8. Row 2 / Column 1 → 3 (Naked Single)
  9. Row 1 / Column 1 → 9 (Full House)
  10. Row 8 / Column 6 → 7 (Naked Single)
  11. Row 5 / Column 6 → 6 (Naked Single)
  12. Row 1 / Column 6 → 5 (Full House)
  13. Row 8 / Column 9 → 4 (Naked Single)
  14. Row 8 / Column 5 → 8 (Full House)
  15. Row 1 / Column 7 → 3 (Hidden Single)
  16. Row 4 / Column 1 → 6 (Hidden Single)
  17. Row 2 / Column 7 → 5 (Hidden Single)
  18. Row 5 / Column 7 → 7 (Naked Single)
  19. Row 6 / Column 7 → 6 (Full House)
  20. Row 5 / Column 5 → 1 (Naked Single)
  21. Row 6 / Column 8 → 8 (Naked Single)
  22. Row 5 / Column 8 → 5 (Full House)
  23. Row 5 / Column 4 → 8 (Full House)
  24. Row 6 / Column 1 → 7 (Full House)
  25. Row 4 / Column 4 → 7 (Full House)
  26. Row 4 / Column 2 → 8 (Full House)
  27. Row 9 / Column 1 → 8 (Full House)
  28. Row 9 / Column 2 → 7 (Full House)
  29. Row 7 / Column 5 → 6 (Naked Single)
  30. Row 2 / Column 4 → 6 (Naked Single)
  31. Row 2 / Column 5 → 7 (Full House)
  32. Row 9 / Column 5 → 4 (Full House)
  33. Row 7 / Column 8 → 7 (Naked Single)
  34. Row 1 / Column 8 → 6 (Full House)
  35. Row 1 / Column 9 → 7 (Full House)
  36. Row 9 / Column 4 → 5 (Naked Single)
  37. Row 7 / Column 4 → 1 (Full House)
  38. Row 7 / Column 9 → 5 (Full House)
  39. Row 9 / Column 9 → 6 (Full House)
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