Event: Grand Prix S5

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Opponent Rating Result
Colin Abell 1509 0 - 1
Benjamin R Shiers 1450 ½ - ½
Ewan F Corden 1277 0 - 1
Esme A Shiers 1000 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1009 = (5236 + 400 * (0 - 3)) / 4)

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