En passant (from French: "in passing") is a move in the board game of chess. En passant is a special capture made immediately after a player moves a pawn two squares forward from its starting position, and an opposing pawn could have captured it as if it had only ... Read More

In chess, a "tempo" is a gain in time-units (represented by moves). When one player gains a tempo, it effectively means that his opponent has been forced to waste one or more moves. A tempo is usually gained by developing a piece that attacks another of greater value, ... Read More