Event: Grand Prix S10

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Opponent Rating Result
David Millington 1627 0 - 1
Esme A Shiers 1000 1 - 0
David E Shiers 1649 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1559 = (4276 + 400 * (2 - 1)) / 3)

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