Online chess for 4 players - free, no account needed
lay four-player chess on a 14×14 board. Create a game and share one link: the first four people play, and everyone else watches live. Free, no sign-up.
Pace needs two or more snapshots. This launch has 1, so velocity and momentum read as unmeasured rather than zero.
A source that found nothing is a measurement. A source that has not run is a gap. Neither means the launch lacks the thing.