Event: Dave Welch 7200 League

Opponent Rating Result
Sanjoy K Banerjee 1733 ½ - ½
David CA Colbourne 1776 1 - 0
Mal Hanlon 1746 ½ - ½
Michael Clarke 1850 ½ - ½
Peter Mellor 1750 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1931 = (8855 + 400 * (2 - 0)) / 5)

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