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

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

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

Solution Steps:

  1. Row 9 / Column 8 → 8 (Naked Single)
  2. Row 9 / Column 4 → 5 (Full House)
  3. Row 2 / Column 7 → 4 (Hidden Single)
  4. Row 3 / Column 4 → 1 (Hidden Single)
  5. Row 5 / Column 6 → 4 (Hidden Single)
  6. Row 8 / Column 8 → 4 (Hidden Single)
  7. Row 2 / Column 2 → 3 (Hidden Single)
  8. Locked Candidates Type 1 (Pointing): 7 in b2 => r456c5<>7
  9. Locked Candidates Type 1 (Pointing): 5 in b5 => r23c5<>5
  10. Locked Candidates Type 1 (Pointing): 6 in b5 => r7c5<>6
  11. Row 7 / Column 6 → 6 (Hidden Single)
  12. Give Up: Don't know how to proceed!
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