The play of an unnecessarily high card in a suit to preserve a small card.
For example:

If West leads out the ace and king, East needs to unblock the queen in order that West can run the suit.
Week 0154 : 5th June 2023
The play of an unnecessarily high card in a suit to preserve a small card.
For example:
If West leads out the ace and king, East needs to unblock the queen in order that West can run the suit.