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Naked Single

When only one candidate is left in a cell, that digit is decided.

How it works on this board

Only 7 remains in the target cell

1

9

4

8

4

4

8

3

5

2

6

7

8

3

9

5

7

3

4

1

9

6

2

5

No marks yetPosition 0 / 2

7

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