What does a "+" sign signify in chess notation?
In chess notation, the "+" symbol indicates a check. For example, "Nf3+" would indicate a knight move to square f3 that results in a check to the opponent's king.
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### Instruction:

What does a "+" sign signify in chess notation?

### Response:

In chess notation, the "+" symbol indicates a check. For example, "Nf3+" would indicate a knight move to square f3 that results in a check to the opponent's king.
