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

This Sudoku Puzzle has 30 steps and it is solved using Naked Single, Full House, Hidden Single, Naked Pair, undefined, Give Up techniques.

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

Solution Steps:

  1. Row 3 / Column 3 → 9 (Naked Single)
  2. Row 1 / Column 1 → 5 (Naked Single)
  3. Row 2 / Column 2 → 7 (Naked Single)
  4. Row 3 / Column 1 → 4 (Naked Single)
  5. Row 1 / Column 3 → 1 (Full House)
  6. Row 3 / Column 8 → 3 (Naked Single)
  7. Row 1 / Column 4 → 9 (Naked Single)
  8. Row 1 / Column 9 → 8 (Naked Single)
  9. Row 2 / Column 5 → 5 (Naked Single)
  10. Row 4 / Column 4 → 6 (Naked Single)
  11. Row 1 / Column 7 → 7 (Naked Single)
  12. Row 1 / Column 6 → 3 (Full House)
  13. Row 2 / Column 4 → 1 (Naked Single)
  14. Row 5 / Column 4 → 8 (Naked Single)
  15. Row 6 / Column 5 → 9 (Naked Single)
  16. Row 6 / Column 2 → 6 (Naked Single)
  17. Row 6 / Column 7 → 4 (Full House)
  18. Row 9 / Column 2 → 9 (Naked Single)
  19. Row 5 / Column 2 → 3 (Full House)
  20. Row 4 / Column 3 → 2 (Naked Single)
  21. Row 5 / Column 1 → 9 (Full House)
  22. Row 5 / Column 8 → 1 (Naked Single)
  23. Row 5 / Column 9 → 6 (Naked Single)
  24. Row 2 / Column 9 → 4 (Hidden Single)
  25. Row 2 / Column 8 → 9 (Full House)
  26. Row 8 / Column 3 → 5 (Hidden Single)
  27. Row 7 / Column 3 → 3 (Full House)
  28. Naked Pair: 6,8 in r79c7 => r8c7<>6, r8c7<>8
  29. W-Wing: 6/8 in r7c7,r8c1 connected by 8 in r9c17 => r7c1<>6
  30. Give Up: Don't know how to proceed!
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