Event: 2nd Cornwalll Autumn Minor

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Opponent	Rating	Result
Kieran Kerim	1100	1 - 0
Rafferty Renshaw	0	0 - 1
Lloyd Russell	1337	1 - 0
Ben Jago	1417	0 - 1
David Pemberton	0	0 - 1

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

691 = (3854 + 400 * (2 - 3)) / 5)