Event: Division 1

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Opponent Rating Result
Thomas B Bonn 2240 ½ - ½
Mark Davey 2105 1 - 0
Simon Wilks 2195 ½ - ½
Graham DJ Keane 2179 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2280 = (8719 + 400 * (1 - 0)) / 4)

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