What is an overlap (positional fault)?

At the moment of the serve, players must stand in their rotation order:

• Each front-row player must be closer to the net than the back-row player behind them (4 in front of 5, 3 in front of 6, 2 in front of 1).
• In each row, players must keep their left-to-right order (4–3–2 and 5–6–1).

Breaking this is an overlap — the team loses the rally. Positions are judged by the feet. Try it in the overlap sandbox!