Event: Barnett

Opponent Rating Result
Paul G Day 153 1 - 0
Christopher Bak 186 ½ - ½
David Barlow 171 1 - 0
Phil R Watson 206
performance = (sum(opponents ratings) + 400(wins-losses)) / games

437 = (510 + 400 * (2 - 0)) / 3)

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