Event: Division One

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Opponent Rating Result
William J Foo 2150 0 - 1
Andrew P McCumiskey 2111 0 - 1
Peter M Gayson 2126 0 - 1
Ian Emery 1911 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1875 = (8298 + 400 * (1 - 3)) / 4)

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