Event: Division X

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Opponent Rating Result
Leon HJ Fincham 1725 0 - 1
Michael Larby 1381 1 - 0
Michael Perry 1460 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1389 = (4566 + 400 * (1 - 2)) / 3)

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