Function play_tries 

pub fn play_tries<S, R: Sides>(
    stage: &S,
    entrant: &dyn Entrant<S, R>,
    seeds: Range<u64>,
    turns: u32,
) -> Result<Vec<Tried>, PlayError<R>>
where
    R::Command: Clone,
    R::Outcome: Debug,

entrant plays stage once from each of seeds, each try stopped at turn turns: its tries in seed order.