Event: Armstrong Cup

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Opponent Rating Result
Phil H Jackson 1525 0 - 1
Joe Murray 1496 1 - 0
Dave Jarema 1813 0 - 1
John S Clarke 1786 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1455 = (6620 + 400 * (1 - 3)) / 4)

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