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

This Sudoku Puzzle has 34 steps and it is solved using Naked Single, Full House, Hidden Single, Skyscraper, undefined, Hidden Rectangle, Give Up techniques.

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

Solution Steps:

  1. Row 4 / Column 7 → 8 (Naked Single)
  2. Row 9 / Column 9 → 1 (Naked Single)
  3. Row 3 / Column 7 → 4 (Naked Single)
  4. Row 4 / Column 1 → 2 (Naked Single)
  5. Row 6 / Column 8 → 6 (Naked Single)
  6. Row 7 / Column 7 → 9 (Naked Single)
  7. Row 5 / Column 7 → 5 (Full House)
  8. Row 4 / Column 9 → 7 (Naked Single)
  9. Row 5 / Column 9 → 4 (Full House)
  10. Row 7 / Column 9 → 8 (Naked Single)
  11. Row 8 / Column 8 → 3 (Full House)
  12. Row 4 / Column 5 → 6 (Naked Single)
  13. Row 4 / Column 2 → 1 (Full House)
  14. Row 1 / Column 9 → 9 (Naked Single)
  15. Row 3 / Column 9 → 6 (Full House)
  16. Row 6 / Column 1 → 5 (Hidden Single)
  17. Row 1 / Column 5 → 5 (Hidden Single)
  18. Row 9 / Column 3 → 5 (Hidden Single)
  19. Row 7 / Column 3 → 1 (Hidden Single)
  20. Row 2 / Column 8 → 2 (Hidden Single)
  21. Row 1 / Column 8 → 8 (Full House)
  22. Row 1 / Column 3 → 3 (Naked Single)
  23. Row 2 / Column 3 → 6 (Hidden Single)
  24. Row 5 / Column 3 → 8 (Full House)
  25. Row 5 / Column 2 → 6 (Full House)
  26. Row 5 / Column 4 → 9 (Naked Single)
  27. Row 5 / Column 6 → 7 (Full House)
  28. Skyscraper: 4 in r1c4,r9c5 (connected by r19c2) => r2c5,r8c4<>4
  29. Row 8 / Column 4 → 1 (Naked Single)
  30. Row 6 / Column 6 → 1 (Hidden Single)
  31. X-Wing: 4 c16 r28 => r8c25<>4
  32. Hidden Rectangle: 7/8 in r3c12,r8c12 => r8c2<>7
  33. Row 8 / Column 2 → 8 (Naked Single)
  34. Give Up: Don't know how to proceed!
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