Event: Division 2

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Opponent Rating Result
Lewys Davies 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

400 = (0 + 400 * (1 - 0)) / 1)

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Opponent Rating Result
Leon Horsfall 0 0 - 1
James Parker 903 1 - 0
Lawrence Harold 1489 0 - 1
Leon Horsfall 0 ½ - ½
Grieg Ichim 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

318 = (2392 + 400 * (1 - 3)) / 5)