Must one say "queen check" before capturing a queen? I was playing a friend and I took her queen. She said that I didn't say &quot;queen check&quot; beforehand. I have never heard of this. Is it a rule?
The official FIDE laws of chess do not know about a queen check. Announcing a  &quot;queen check“ might even be considered a case of &quot;to distract or annoy the opponent“ (11.5). Even announcing a &quot;king check“ is not recommended.
That’s for tournament chess. In informal games, it is not unusual in some groups to announce a check and a &quot;queen check“ (by &quot;gardez“, French for &quot;keep attention“). Even there it is not a rule, but a courtesy. Not announcing a check or gardez is considered impolite, but you may take the queen anyway.