Event: Holly & the Ivy Chess League

Opponent Rating Result
Robert Mitchell 1698 1 - 0
Dave Gray 1760 ½ - ½
Peter Czerwinski 1470 1 - 0
Peter Czerwinski 1470 1 - 0
Robert Mitchell 1688 1 - 0
Dave Gray 1691 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1896 = (9777 + 400 * (4 - 0)) / 6)

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