Event: B&DCL Div 3

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Opponent Rating Result
Stephen Bolton 1726 0 - 1
Stephen M Pollyn 1766 0 - 1
Paul A Jackson 1718 ½ - ½
Tim Joyce 1661 1 - 0
Neil Salinger 1639 0 - 1
Andy Matko 1727 0 - 1
Peter Austin 1600 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1520 = (11837 + 400 * (1 - 4)) / 7)

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