Event: Essex Summer Rapid Knockout

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Opponent	Rating	Result
Kevin Bowmer	2029	1 - 0
Kevin Bowmer	2029	0 - 1
John H Hodgson	2147	½ - ½
John H Hodgson	2147	0 - 1

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

1988 = (8352 + 400 * (1 - 2)) / 4)