Event: Division 4

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Opponent Rating Result
Alan Blackburn 1374 0 - 1
Irina Briggs 1568 0 - 1
John Thomas 1356 1 - 0
Jeff Bentham 1542 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1260 = (5840 + 400 * (1 - 3)) / 4)

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