Event: Division 5

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Opponent Rating Result
Paul J Osborne 1506 0 - 1
Alice Moon 1424 1 - 0
Ryan Hamm 1313 ½ - ½
Peter Ackland 1396 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1310 = (5639 + 400 * (1 - 2)) / 4)

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