Event: Grand Prix S2

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Opponent Rating Result
David A Hallen 1486 0 - 1
S Ali Arshad 1167 0 - 1
Rowan J Webb 1375 0 - 1
Ewan F Corden 1277 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

926 = (5305 + 400 * (0 - 4)) / 4)

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