Event: Walker Shield

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Opponent	Rating	Result
Felix Coker	35	1 - 0
Robert Twigg	77	1 - 0
Robert Twigg	77	1 - 0
Reginald G Pidduck	101	½ - ½
Cameron J Plater	49	1 - 0
Darren Coker	40	1 - 0
Mike Jenkinson	78	0 - 1
Cameron J Plater	49	1 - 0

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

313 = (506 + 400 * (6 - 1)) / 8)