Event: Summer Tournament

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Opponent Rating Result
Vytautas Gedminas 1713 0 - 1
Michael Ingham 1500 1 - 0
George Hart 1450 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1421 = (4663 + 400 * (1 - 2)) / 3)

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