Event: SCCU County Championship: Open

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Opponent	Rating	Result
Michael R Smart	1908	0 - 1
Mark Davey	2105	0 - 1
Alan H Palmer	1743	1 - 0
Henry Cove	1990	½ - ½

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1837 = (7746 + 400 * (1 - 2)) / 4)