Event: Millar Cup

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Opponent Rating Result
Robert Twigg 1383 0 - 1
James J Essinger 1878 0 - 1
Alan D Evans 1680 0 - 1
Paul Verrall 1369 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1378 = (6310 + 400 * (1 - 3)) / 4)

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