Event: Barnett / Parkinson

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Opponent Rating Result
David Barlow 2077 0 - 1
Paul G Day 1725 ½ - ½
Bill Tait 1672 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1558 = (5474 + 400 * (0 - 2)) / 3)

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