Event: Division 5

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Opponent Rating Result
Eddie Czestochowski 1674 0 - 1
Martin Thompson 1394 0 - 1
Alexander Surtees 1499 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1389 = (4567 + 400 * (1 - 2)) / 3)

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