Event: C Division

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Opponent Rating Result
Peter R Archer 1477 0 - 1
J Alan Stockley 1424 0 - 1
James Mann 1318 1 - 0
Mark T Priest 1457 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1219 = (5676 + 400 * (1 - 3)) / 4)

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