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

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