Event: Division 3

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Opponent Rating Result
Ian B Chester 1754 0 - 1
Martin Seeber 1849 ½ - ½
Bryan D Harkness 1970 0 - 1
Stuart Skelsey 1814 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1547 = (7387 + 400 * (0 - 3)) / 4)

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