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

This Sudoku Puzzle has 21 steps and it is solved using Full House, Naked Single techniques.

Naked Single Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 9 → 3 (Full House)
  2. Row 3 / Column 7 → 9 (Full House)
  3. Row 5 / Column 5 → 9 (Full House)
  4. Row 4 / Column 9 → 9 (Naked Single)
  5. Row 6 / Column 9 → 1 (Full House)
  6. Row 9 / Column 4 → 4 (Naked Single)
  7. Row 5 / Column 7 → 6 (Naked Single)
  8. Row 5 / Column 3 → 8 (Full House)
  9. Row 6 / Column 7 → 3 (Full House)
  10. Row 6 / Column 6 → 4 (Naked Single)
  11. Row 7 / Column 6 → 1 (Naked Single)
  12. Row 7 / Column 7 → 4 (Full House)
  13. Row 9 / Column 7 → 1 (Full House)
  14. Row 9 / Column 6 → 9 (Full House)
  15. Row 4 / Column 6 → 8 (Full House)
  16. Row 4 / Column 3 → 6 (Naked Single)
  17. Row 6 / Column 3 → 9 (Full House)
  18. Row 6 / Column 1 → 2 (Naked Single)
  19. Row 4 / Column 1 → 4 (Full House)
  20. Row 4 / Column 4 → 2 (Full House)
  21. Row 6 / Column 4 → 6 (Full House)
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