Event: Division 2

Opponent Rating Result
Zbynek Strela 1699 0 - 1
Graeme Jones 1723 ½ - ½
Chris Wescomb 1600 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1407 = (5022 + 400 * (0 - 2)) / 3)

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