Event: Division Cup B

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Opponent Rating Result
David Filer 1570 ½ - ½
Jonathan Utting 0 1 - 0
John Conway 1630 0 - 1
John Conway 1630 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1308 = (4830 + 400 * (2 - 1)) / 4)

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