Event: Grand Prix 1

Opponent Rating Result
Sharon Merchant 1344 1 - 0
William H Luxton 1622 0 - 1
John D Kimber 1445 0 - 1
Luke Chapman 1618 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1307 = (6029 + 400 * (1 - 3)) / 4)

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