Event: Doncaster League

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Opponent Rating Result
Paul Lea-Kime 131 1 - 0
Alan Bramall 145 0 - 1
Nicholas Mahoney 138 0 - 1
Steven Devonshire 120 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

134 = (534 + 400 * (2 - 2)) / 4)

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