Event: David Jenkins Memorial Cup

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Opponent	Rating	Result
Kieran Macphail	1550	0 - 1
Robert Dyer	0	1 - 0
Sam Nicholls	0	1 - 0
Andy Young	1410	0 - 1
Nigel J Kirkman	1778	0 - 1

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

868 = (4738 + 400 * (2 - 3)) / 5)