Event: Grand Prix S1

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Opponent Rating Result
Simon R Edwards 2054 0 - 1
Caroline L Mountford 1603 0 - 1
S Ali Arshad 1167 0 - 1
David Millington 1627 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1213 = (6451 + 400 * (0 - 4)) / 4)

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