Event: Division 1

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Opponent Rating Result
Gautam R Jain 2030 ½ - ½
Jonathan W Rowson 0 0 - 1
Richard A Bates 2427 0 - 1
Peter T Roberson 2511 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1542 = (6968 + 400 * (0 - 2)) / 4)

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