Event: Hull Club Championship

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Opponent	Rating	Result
Granville Mellor	108	1 - 0
Mark I Collinson	177	0 - 1
Dave M Cooper	105	½ - ½
Stephen Greep	130	0 - 1
Steve King	113	½ - ½

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

47 = (633 + 400 * (1 - 2)) / 5)