Event: Division 3

Opponent Rating Result
Bowie Carter 1570 1 - 0
Peter J R Oliver 1659 ½ - ½
Andrew T Leadbetter 1543 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1857 = (4772 + 400 * (2 - 0)) / 3)

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