Event: Summer League Division 4

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Opponent Rating Result
Milana Loban 0 1 - 0
David Burn 1363 0 - 1
Tom Key 1520 ½ - ½
Jamie Wright 1673 0 - 1
John Crewe 1533 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1138 = (6089 + 400 * (1 - 2)) / 5)

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