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

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