Event: B&DCL Div 3

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Opponent Rating Result
Simon Errington 1674 ½ - ½
Ron Salinger 1479 0 - 1
Paul Sandy 1567 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1573 = (4720 + 400 * (1 - 1)) / 3)

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