Event: Hammersmith Rockhammer Cup

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Opponent	Rating	Result
Ljubomir Koncar	1254	1 - 0
Harry O'Neill	1381	0 - 1
Alexander Royce	1362	1 - 0
Andrew Macleod	1797	0 - 1
Aloysius Lip	1951	0 - 1
Ljubomir Koncar	1254	1 - 0
Harry O'Neill	1381	0 - 1
Ljubomir Koncar	1254	0 - 1
Mark Croasdale	1579	0 - 1

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

1335 = (13213 + 400 * (3 - 6)) / 9)