Event: Division 3

Opponent Rating Result
Derek Ludlam 1565 ½ - ½
Simon Jones 1423 1 - 0
Jack Moaby 0 0 - 1
Adamjeet Singh 1655 0 - 1
Kenneth L Marsden 1431 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1135 = (6074 + 400 * (1 - 2)) / 5)

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