Event: Mini League

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Opponent Rating Result
Duncan Stables 1506 0 - 1
Keith J Riach 1690 0 - 1
Mike Bramson 1978 0 - 1
Paul RH Clarke 1751 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1331 = (6925 + 400 * (0 - 4)) / 4)

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