Event: Grand Prix S10

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Opponent Rating Result
Benjamin R Shiers 1450 0 - 1
S Ali Arshad 1167 0 - 1
Owen Frodsham 1050 0 - 1
Joseph P Alcock 1558 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

906 = (5225 + 400 * (0 - 4)) / 4)

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