Event: Division Four

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Opponent Rating Result
John Lunn 1564 0 - 1
David Roberts 1425 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1495 = (2989 + 400 * (1 - 1)) / 2)

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Opponent Rating Result
Paul Heeney 1450 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1050 = (1450 + 400 * (0 - 1)) / 1)