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

This Sudoku Puzzle has 14 steps and it is solved using Bivalue Universal Grave + 1, Naked Single, Full House techniques.

Naked Single Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Bivalue Universal Grave + 1 => r6c4<>7, r6c4<>9
  2. Row 6 / Column 4 → 2 (Naked Single)
  3. Row 2 / Column 4 → 9 (Naked Single)
  4. Row 5 / Column 4 → 7 (Full House)
  5. Row 6 / Column 6 → 5 (Naked Single)
  6. Row 2 / Column 6 → 2 (Full House)
  7. Row 2 / Column 5 → 5 (Full House)
  8. Row 6 / Column 8 → 9 (Naked Single)
  9. Row 6 / Column 2 → 7 (Full House)
  10. Row 5 / Column 2 → 5 (Full House)
  11. Row 5 / Column 5 → 3 (Naked Single)
  12. Row 4 / Column 5 → 9 (Full House)
  13. Row 4 / Column 8 → 3 (Full House)
  14. Row 5 / Column 8 → 2 (Full House)
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