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

This Sudoku Puzzle has 4 steps and it is solved using Hidden Single, Locked Triple, Locked Candidates Type 1 (Pointing), Give Up techniques.

Hidden Single Explanation
Locked Candidates Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 6 / Column 6 → 7 (Hidden Single)
  2. Locked Triple: 2,3,6 in r3c456 => r1c5,r3c13<>2, r2c4,r3c7<>3
  3. Locked Candidates Type 1 (Pointing): 4 in b3 => r6789c7<>4
  4. Give Up: Don't know how to proceed!
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