Event: Division Two

Opponent Rating Result
Andrew N Lake 1807 ½ - ½
Stewart K Fishburne 2023 0 - 1
Gavin Cartwright 1889 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1640 = (5719 + 400 * (0 - 2)) / 3)

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