Event: Grand Prix S7

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Opponent Rating Result
Simon R Edwards 2054 0 - 1
S Ali Arshad 1167 1 - 0
David E Shiers 1649 0 - 1
Benjamin R Shiers 1450 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1380 = (6320 + 400 * (1 - 3)) / 4)

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