Event: Division 3

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Opponent Rating Result
Gideon Gyeabour Ansu 1963 0 - 1
Nigel Pollett 1733 ½ - ½
Dave J Williams 1677 0 - 1
Jason LeRoy 1427 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1600 = (6800 + 400 * (1 - 2)) / 4)

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