Event: Division 2

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Opponent Rating Result
James Bartram 1643 0 - 1
Jack Lucas 0 1 - 0
John E Richards 1868 1 - 0
Elmira Walker 1737 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1512 = (5248 + 400 * (3 - 1)) / 4)

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