Skewer (chess)
From Conservapedia
Skewers in chess are like reverse pins.
A skewer is when a valuable piece of the opponent (such as a king or queen) is attacked and compelled to move away, in order to avoid being captured. Then a less valuable piece is left behind it in the same line of attack, which is then captured.
As with pins, long-range pieces of a queen, rook, or bishop are needed in order to create a skewer. Knights can fork, but not skewer.