Event: League Division 2

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Opponent Rating Result
Jon Jordan 1620 0 - 1
Michael I Connor 1787 0 - 1
Paul Hardy 1543 1 - 0
Gary P Smith 1853 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1601 = (6803 + 400 * (1 - 2)) / 4)

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