Event: A Division

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Opponent Rating Result
Glenn Trueman 1913 ½ - ½
Ian D Lamb 1612 ½ - ½
David Boulden 1679 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1601 = (5204 + 400 * (0 - 1)) / 3)

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