Event: NSDCA MMS Division 2

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Opponent Rating Result
David S Johnson 1623 1 - 0
Wesley J Vickers 1525 ½ - ½
David A Hallen 1491 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1680 = (4639 + 400 * (1 - 0)) / 3)

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