Event: AG Sunderland

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Opponent Rating Result
Niks Bisovs 0 0 - 1
Thomas Hewitt 0 0 - 1
Brian Ward 1218 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

273 = (1218 + 400 * (1 - 2)) / 3)

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