Event: Division 1

Opponent Rating Result
Robert J Frith 1771 0 - 1
Chris Kaye 1700 ½ - ½
Anthony J Pimblett 1727 1 - 0
Phil A Brine 1822 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1655 = (7020 + 400 * (1 - 2)) / 4)

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