Event: 400 League

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Opponent Rating Result
David Hill 90 1 - 0
Tom Hails 80 0 - 1
Roy Evans 80 0 - 1
R (Bob) Lindsay 90 ½ - ½
Philip Dexter 80 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

84 = (420 + 400 * (2 - 2)) / 5)

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