That note is not from Chess.app, but from "Sjeng", a 3rd party dependency vendored into Apple's Chess.app. That notice has been there in all the versions of Che

That note is not from Chess.app, but from "Sjeng", a 3rd party dependency vendored into Apple's Chess.app. That notice has been there in all the versions of Chess that are available (from Chess-2.0 to Chess-347). See: https://en.wikipedia.org/wiki/Sjeng_(software) https://en.wikipedia.org/wiki/Sjeng_(software)