Event: Dudley Townshend Trophy

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Opponent	Rating	Result
Wahhaab Ishaq	0	1 - 0
David M Cotterell	113	1 - 0
Martin J Draper	108	1 - 0

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

474 = (221 + 400 * (3 - 0)) / 3)