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

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