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

This Sudoku Puzzle has 12 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Give Up techniques.

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 7 / Column 2 → 4 (Hidden Single)
  2. Row 9 / Column 8 → 1 (Hidden Single)
  3. Row 7 / Column 6 → 3 (Hidden Single)
  4. Row 8 / Column 4 → 9 (Naked Single)
  5. Row 8 / Column 3 → 3 (Hidden Single)
  6. Row 7 / Column 1 → 6 (Hidden Single)
  7. Row 8 / Column 1 → 1 (Hidden Single)
  8. Row 8 / Column 9 → 2 (Hidden Single)
  9. Row 9 / Column 9 → 7 (Hidden Single)
  10. Locked Candidates Type 1 (Pointing): 5 in b4 => r123c3<>5
  11. Locked Candidates Type 1 (Pointing): 8 in b7 => r9c56<>8
  12. Give Up: Don't know how to proceed!
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