Event: Reading-Chess-Championships

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Opponent Rating Result
Nick Spearing 1000 1 - 0
Nick Spearing 1000 0 - 1
Nick Spearing 1000 0 - 1
Neil Roy 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

750 = (3000 + 400 * (2 - 2)) / 4)

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