Fatto matematico: 9751 is the number of possible configurations of pegs (up to symmetry) after 8 jumps in solitaire.
Trivia: 9751 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: September 11th is the day in 1989 that Hungary announces that the East German refugees who had been housed in temporary camps, were free to leave for West Germany.