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

This Sudoku Puzzle has 33 steps and it is solved using Naked Single, Hidden Single, Full House, Uniqueness Test 2, Naked Triple, undefined, Give Up techniques.

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

Solution Steps:

  1. Row 6 / Column 2 → 7 (Naked Single)
  2. Row 3 / Column 3 → 2 (Hidden Single)
  3. Row 4 / Column 7 → 2 (Hidden Single)
  4. Row 2 / Column 7 → 7 (Hidden Single)
  5. Row 6 / Column 5 → 2 (Hidden Single)
  6. Row 4 / Column 2 → 4 (Hidden Single)
  7. Row 2 / Column 6 → 4 (Hidden Single)
  8. Row 3 / Column 8 → 4 (Hidden Single)
  9. Row 5 / Column 7 → 1 (Hidden Single)
  10. Row 7 / Column 9 → 2 (Hidden Single)
  11. Row 8 / Column 4 → 9 (Hidden Single)
  12. Row 4 / Column 4 → 6 (Naked Single)
  13. Row 4 / Column 8 → 9 (Naked Single)
  14. Row 4 / Column 3 → 1 (Full House)
  15. Row 5 / Column 5 → 3 (Naked Single)
  16. Row 5 / Column 6 → 9 (Full House)
  17. Row 5 / Column 1 → 6 (Naked Single)
  18. Row 5 / Column 8 → 5 (Full House)
  19. Row 6 / Column 3 → 9 (Full House)
  20. Row 2 / Column 1 → 8 (Naked Single)
  21. Row 7 / Column 1 → 9 (Full House)
  22. Row 1 / Column 2 → 3 (Naked Single)
  23. Row 2 / Column 3 → 6 (Full House)
  24. Row 7 / Column 2 → 8 (Naked Single)
  25. Row 9 / Column 2 → 1 (Full House)
  26. Row 1 / Column 9 → 9 (Hidden Single)
  27. Row 9 / Column 5 → 4 (Hidden Single)
  28. Row 8 / Column 5 → 1 (Hidden Single)
  29. Row 9 / Column 6 → 8 (Hidden Single)
  30. Uniqueness Test 2: 1/3 in r2c49,r3c49 => r3c57<>5
  31. Naked Triple: 3,6,8 in r3c567 => r3c49<>3
  32. XYZ-Wing: 3/6/8 in r1c8,r36c7 => r1c7<>6
  33. Give Up: Don't know how to proceed!
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