Event: Barnett / Parkinson

Opponent Rating Result
Paul G Day 1661 ½ - ½
David Barlow 2086 0 - 1
Mark D Crowther 2115 0 - 1
Lee Crawford 1874 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1734 = (7736 + 400 * (0 - 2)) / 4)

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