Event: Ross Cup

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Opponent Rating Result
Andrew D Bettley 148 ½ - ½
Lester Jones 103 1 - 0
Shaun E Taylor 130 ½ - ½
Janina Kanajeva 94 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

119 = (475 + 400 * (1 - 1)) / 4)

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