[hollerith]

Not counting online games, I've played many 100s of games of chess with many dozens of people, mostly strangers, incl 12-year-olds (when I was 12) and not once did a dispute or difference of opinion arise about the legality of any move (incl en-passant moves).

What is the name of this strange country where players who are not just starting out don't know the rules of chess?

[lmm]

Here in the UK I have had to call a referee over during a tournament because my opponent didn't know about en passant. And it turned out said referee didn't know either (fortunately the other players backed me up).