Event: D Division

Opponent Rating Result
David F Newell 1795 ½ - ½
Neil A Oddie 1706 ½ - ½
Mohammed Rohman 1486 1 - 0
Mark Davis 1601 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1847 = (6588 + 400 * (2 - 0)) / 4)

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