Event: SCCU County Championship: U1850

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Opponent Rating Result
David Helps 1686 0 - 1
Neil Crosswell 1698 ½ - ½
Robert G Thompson 1702 1 - 0
Michael J Gunn 1623 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1677 = (6709 + 400 * (1 - 1)) / 4)

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