Event: Essex Summer Rapid Knockout

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Opponent Rating Result
Ivan J Myall 2009 0 - 1
Ivan J Myall 2009 1 - 0
Peter Jaszkiwskyj 1963 ½ - ½
Peter Jaszkiwskyj 1963 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1886 = (7944 + 400 * (1 - 2)) / 4)

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