Event: Division 2

Opponent Rating Result
John Conway 1576 1 - 0
Roger Threlfall 1684 1 - 0
Bernard A Rogers 1752 1 - 0
David Riley 1635 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1862 = (6647 + 400 * (3 - 1)) / 4)

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