Event: Rapid Play League

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Opponent Rating Result
Samuel J Playford 1544 1 - 0
Samuel J Playford 1544 1 - 0
Peter F Mason 1748 0 - 1
Peter F Mason 1748 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1846 = (6584 + 400 * (3 - 1)) / 4)

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