Event: Holly & the Ivy Chess League

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Opponent Rating Result
Mark Rojinsky 1479 ½ - ½
Bryn W Charlesworth 1553 1 - 0
Vivien Webster 1659 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1697 = (4691 + 400 * (1 - 0)) / 3)

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