Event: Hammersmith Rockhammer Cup (Online)

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Opponent	Rating	Result
Christof Brixel	2017	0 - 1
Christof Brixel	2017	0 - 1

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

1617 = (4034 + 400 * (0 - 2)) / 2)