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Event: SASCA Rapidplay

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Opponent Rating Result
Benjamin Layton 1302 0 - 1
Alexander Taylor 743 0 - 1
Zahra Ali 650 0 - 1
Edward J Alexander 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

474 = (2695 + 400 * (1 - 3)) / 4)

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