Event: Baum Trophy summer league

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Opponent Rating Result
Cole Walsh 1094 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1494 = (1094 + 400 * (1 - 0)) / 1)

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Opponent Rating Result
Mark D McWilliams 1445 0 - 1
Vladimir Cernavskis 1628 0 - 1
Lakis Dometakis 1322 0 - 1
Vladimir Cernavskis 1628 1 - 0
Mark D McWilliams 1445 1 - 0
Lakis Dometakis 1322 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1398 = (8790 + 400 * (2 - 3)) / 6)