Event: Dolan Trophy KO

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Opponent	Rating	Result
Stephen Smithson	1338	½ - ½
Stephen Smithson	1338	1 - 0
Peter Rose	1465	0 - 1

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

1380 = (4141 + 400 * (1 - 1)) / 3)