Event: Dave Welch 7200 League

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Opponent Rating Result
Jordan Lee 1761 1 - 0
Kevin A Sartain 1778 0 - 1
Steve J Burge 1694 ½ - ½
Keegan Broxup 1673 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1727 = (6906 + 400 * (1 - 1)) / 4)

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