Event: Kalmar Shield

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Opponent	Rating	Result
Bobby Balmer	1200	1 - 0
Aaron Milne	1282	1 - 0
Stephen Deakin	1441	½ - ½

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

1574 = (3923 + 400 * (2 - 0)) / 3)