Event: Division A

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Opponent Rating Result
Martin Pope 131 0 - 1
Shaun Tumelty 96 ½ - ½
Michael I Connor 147 1 - 0
Alan Pidcock 138 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

28 = (512 + 400 * (1 - 2)) / 4)

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