Event: Club Championship

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Opponent	Rating	Result
David Longworth	1336	1 - 0
Skot K May	1818	0 - 1
Matthew Caswell	1636	0 - 1

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

1463 = (4790 + 400 * (1 - 2)) / 3)