Event: Summer League

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Opponent Rating Result
Joe Chan 1609 0 - 1
David Walshaw 1704 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1257 = (3313 + 400 * (0 - 2)) / 2)

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Opponent Rating Result
Ray Devenney 1748 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1748 = (1748 + 400 * (0 - 0)) / 1)