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

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