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

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