![discovered checks](https://images.chesscomfiles.com/uploads/v1/blog/615887.784ddc43.668x375o.805eca8c1f9c@2x.png)
discovered checks
A discovered check is a very dangerous tactic where you can easily win a tempo by moving away a piece to discover a check an the opponents king.
In this example white moved its knight and discovered a check from the rook and attacking the queen. Here are some other examples