Event: Division 3

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Opponent Rating Result
Nick J London 1706 0 - 1
Thomas Pownall 1601 1 - 0
Andy While 1523 0 - 1
Eddie Jones 1300 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1333 = (6130 + 400 * (1 - 3)) / 4)

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