Event: Grand Prix 1

Opponent Rating Result
Harry Morter 1118 0 - 1
Edward Booth 0 1 - 0
Mike Chapman 0 1 - 0
Rose Burgess 1333 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

613 = (2451 + 400 * (2 - 2)) / 4)

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