Event: Lewisham Club Championship

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Opponent Rating Result
Andrew D Craig 1806 0 - 1
David C Helsby 1797 0 - 1
David Hassine 1460 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1288 = (5063 + 400 * (0 - 3)) / 3)

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