Event: Division 2

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Opponent Rating Result
Mike Peers 1429 0 - 1
Peter FK Evans 1352 ½ - ½
James Perks 1278 1 - 0
John E Fryer 1461 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1280 = (5520 + 400 * (1 - 2)) / 4)

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