Event: NSDCA Division 2

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Opponent Rating Result
Michael A Lee 1648 0 - 1
Oskar Jarzynski 1681 0 - 1
Geoff Laurence 1786 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1438 = (5115 + 400 * (0 - 2)) / 3)

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