Event: Division 2

Opponent Rating Result
David R Thomas 1781 1 - 0
Roger Threlfall 1684 0 - 1
Mal Waddell 1861 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1642 = (5326 + 400 * (1 - 2)) / 3)

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