Event: Super League

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Opponent Rating Result
Peter Dhonau 1997 0 - 1
Jim Beaty 1911 0 - 1
William Burgess 1796 1 - 0
A Clive Walley 1903 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1802 = (7607 + 400 * (1 - 2)) / 4)

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