Event: NSDCA MMS Division 2

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Opponent Rating Result
David M Rose 1550 0 - 1
Malcolm A Roberts 1668 ½ - ½
Martin J Chadwick 1270 1 - 0
David A Hallen 1491 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1395 = (5979 + 400 * (1 - 2)) / 4)

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