Event: B Division

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Opponent Rating Result
Andrew Herrity 1437 0 - 1
Darren John Donnison 1530 0 - 1
Peter Townson 1477 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1081 = (4444 + 400 * (0 - 3)) / 3)

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