Event: C Division

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Opponent Rating Result
Kevin M Waterman 1591 0 - 1
Nicholas Webb 1653 0 - 1
Darren John Donnison 1455 ½ - ½
Gordon Dickinson 1499 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1250 = (6198 + 400 * (0 - 3)) / 4)

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