Event: Margate Rapid-Play

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Opponent Rating Result
Joseph Morris 1469 0 - 1
Harry J Sharples 1836 0 - 1
John L Clarke 1418 0 - 1
Roy F Dawson 958 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1220 = (5681 + 400 * (1 - 3)) / 4)

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