Event: Online Division 2

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Opponent Rating Result
Keith Grice 0 0 - 1
Jonathan Smith 0 1 - 0
Thalia Holmes 0 0 - 1
Anthony Purser 0 1 - 0
Ivor Salter 0 1 - 0
Richard G Thompson 0 0 - 1
Martin Ayres 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

57 = (0 + 400 * (4 - 3)) / 7)

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

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