Event: Hull CC Championship

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Opponent	Rating	Result
Scott N Nicholson	0	0 - 1
John G Cooper	2313	0 - 1
Daniel Ryder	0	0 - 1
Andy Blaylock	1255	0 - 0
Ewan Black	1200	0 - 1

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

478 = (3513 + 400 * (0 - 4)) / 4)