Development

Development brings pieces from their starting squares to positions where they can take part in the game.

Opening development usually improves minor pieces, contests the center, and prepares king safety. Moving the same piece repeatedly can leave the rest of the army behind.

Development means placing pieces where they can work

Moving a knight or bishop off the back rank counts as development only in a broad sense. Good development connects the piece to central control, king safety, or a concrete plan without making it an easy target.

One move can develop and create a threat

A move such as Nf3 can develop a knight, attack e5, support d4, and prepare castling. A developing move that forces a reply may also gain a tempo.

A lead in development is temporary

Being ahead in development matters when the active pieces can act before the opponent catches up. If no threat or opening of the position follows, the opponent may finish development and erase the advantage.