what’s the name of a special move in chess which allows a player to move two pieces at the same time?

Castling

Explanation:

Castling is a move in the game of chess involving a player's king and either of the player's original rooks. It is the only move in chess in which a player moves two pieces in the same move, and it is the only move aside from the knight's move where a piece can be said to "jump over" another.

the writings of john locke primarily led the founding fathers to believe that the colonists had a right to overthrow the current british government, since locke held that if a government becomes tyrannical it is the peoples' right to replace it.