Event: Division Two

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Opponent Rating Result
Jonathan Welton 1673 1 - 0
Nigel W Dennis 1776 ½ - ½
David Lilwall 1369 1 - 0
David Lilwall 1373 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1848 = (6191 + 400 * (3 - 0)) / 4)

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