Event: Hammersmith Rockhammer Cup

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Opponent	Rating	Result
Harry Bryant	1564	½ - ½
Zain Patel	1811	0 - 1
Mark Croasdale	1579	0 - 1

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

1385 = (4954 + 400 * (0 - 2)) / 3)