Event: C Division

Opponent Rating Result
Graham R Marshall 1368 0 - 1
Graham Bartram 974 1 - 0
Iain Mellis 0 0 - 1
James Jefferson 1047 1 - 0
Richard Kuby 1381 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

874 = (4770 + 400 * (2 - 3)) / 5)

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