Event: B Division

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Opponent Rating Result
Allan Gardner 1828 ½ - ½
Mark Hesford 1800 0 - 1
Martin Lythgoe 1841 ½ - ½
Michael I Connor 1760 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1707 = (7229 + 400 * (0 - 1)) / 4)

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