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9
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1

This Sudoku Puzzle has 9 steps and it is solved using Locked Pair, Naked Single, Locked Candidates Type 1 (Pointing), Give Up techniques.

Naked Single Explanation
Locked Candidates Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Locked Pair: 4,7 in r89c2 => r456c2,r89c3<>4, r4567c2,r789c3<>7
  2. Row 7 / Column 2 → 1 (Naked Single)
  3. Locked Candidates Type 1 (Pointing): 2 in b7 => r456c3<>2
  4. Locked Candidates Type 1 (Pointing): 5 in b7 => r456c3<>5
  5. Locked Candidates Type 1 (Pointing): 8 in b7 => r456c3<>8
  6. Locked Candidates Type 1 (Pointing): 5 in b9 => r456c7<>5
  7. Locked Candidates Type 1 (Pointing): 8 in b9 => r456c7<>8
  8. Locked Candidates Type 1 (Pointing): 9 in b9 => r456c8<>9
  9. Give Up: Don't know how to proceed!
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