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

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