Event: Division 4

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Opponent Rating Result
Richard Dyce 1502 0 - 1
Ben Eyres 1136 1 - 0
Poppy Dawson-Best 1247 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1428 = (3885 + 400 * (2 - 1)) / 3)

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