Event: A Division

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Opponent Rating Result
Francis Batchelor 2067 1 - 0
Stephen J jnr Roe 1640 1 - 0
Nikhil Bhandari 1707 0 - 1
Richard J Harris 1726 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1785 = (7140 + 400 * (2 - 2)) / 4)

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Opponent Rating Result
Richard J Harris 1726 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2126 = (1726 + 400 * (1 - 0)) / 1)