Event: Open Team KO

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Opponent	Rating	Result
Darren H Whitmore	1930	0 - 1
David Gardiner	1893	1 - 0
Mark A Cundy	1949	½ - ½

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

1924 = (5772 + 400 * (1 - 1)) / 3)