Event: Division 2

Opponent Rating Result
John Jenkins 2012 ½ - ½
Graeme Hood 1852 1 - 0
Richard George 1868 ½ - ½
Matthew Hammond 1855 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1997 = (7587 + 400 * (1 - 0)) / 4)

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