Event: Doncaster League

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Opponent Rating Result
Peter Convery 153 1 - 0
Alexandru Zimleanschi 136 1 - 0
Alan Bramall 145 0 - 1
Peter Convery 158 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

248 = (592 + 400 * (2 - 1)) / 4)

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