Event: Schofield

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Opponent Rating Result
A Jon Munsey 120 0 - 1
Barbara Newcombe 96 1 - 0
Andrew S Kinder 151 0 - 1
Ian Henry 124 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

23 = (491 + 400 * (1 - 2)) / 4)

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