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

This Sudoku Puzzle has 31 steps and it is solved using Full House, Hidden Single, Naked Single, Hidden Pair techniques.

Naked Single Explanation
Hidden Single Explanation
Hidden Pair Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 9 → 8 (Full House)
  2. Row 3 / Column 3 → 4 (Hidden Single)
  3. Row 4 / Column 3 → 8 (Hidden Single)
  4. Row 9 / Column 6 → 8 (Hidden Single)
  5. Row 8 / Column 4 → 5 (Naked Single)
  6. Row 7 / Column 4 → 9 (Naked Single)
  7. Row 7 / Column 3 → 5 (Full House)
  8. Row 9 / Column 4 → 4 (Full House)
  9. Row 8 / Column 3 → 6 (Naked Single)
  10. Row 1 / Column 3 → 9 (Full House)
  11. Row 8 / Column 2 → 8 (Full House)
  12. Row 1 / Column 4 → 7 (Naked Single)
  13. Row 4 / Column 4 → 2 (Full House)
  14. Row 6 / Column 4 → 2 (Full House)
  15. Row 3 / Column 2 → 7 (Naked Single)
  16. Row 3 / Column 7 → 9 (Full House)
  17. Row 2 / Column 7 → 7 (Full House)
  18. Row 2 / Column 6 → 9 (Full House)
  19. Row 1 / Column 6 → 4 (Full House)
  20. Row 9 / Column 2 → 9 (Naked Single)
  21. Row 9 / Column 1 → 7 (Full House)
  22. Hidden Pair: 2,5 in r6c12 => r6c12<>6, r6c1<>9
  23. Row 6 / Column 1 → 5 (Naked Single)
  24. Row 6 / Column 2 → 5 (Naked Single)
  25. Row 1 / Column 1 → 6 (Full House)
  26. Row 1 / Column 2 → 6 (Full House)
  27. Row 4 / Column 1 → 9 (Full House)
  28. Row 4 / Column 9 → 7 (Naked Single)
  29. Row 4 / Column 6 → 6 (Full House)
  30. Row 6 / Column 6 → 7 (Full House)
  31. Row 6 / Column 9 → 9 (Naked Single)
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