Event: Division 3

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Opponent Rating Result
Peter K Harrison 1750 0 - 1
Stephen J Emmerton 1644 ½ - ½
Eddie Hill 1375 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1456 = (4769 + 400 * (0 - 1)) / 3)

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