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Openings

Development

Bringing your pieces off the back rank into active, useful positions.

In the opening you want your knights and bishops out, your king castled, and your rooks connected — quickly and without moving the same piece twice for no reason.

A lead in development means more pieces ready to act. Combined with open lines, it is what powers early attacks and gambits.

Why it matters

Most opening disasters are development disasters: one side brings the queen out early or grabs a pawn, and falls behind in pieces that are actually doing something.

The mistake everyone makes

Moving the same piece three times in the opening while your other pieces sit at home.

Related terms

Opening principles
The starter rules: control the centre, develop pieces, castle early, don't move the queen out too soon.
Tempo
A single move, thought of as a unit of time; you 'gain a tempo' by making a useful move that also forces a reply.
Castling
The one move where the king and a rook move together, tucking the king to safety.
Gambit
An opening that sacrifices material (usually a pawn) for development, the centre, or attacking chances.

See Development in your own games

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