Event: Kalmar Shield

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Opponent Rating Result
Richard Devonport 1390 1 - 0
Stephen Harrison 1555 1 - 0
Anthony Oldham 1405 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1850 = (4350 + 400 * (3 - 0)) / 3)

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