Event: The Friendly League

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Opponent	Rating	Result
Robert Grounds	1173	½ - ½
Ronnie Whiteside	0	½ - ½
Martyn Hamer	2109	½ - ½

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

1094 = (3282 + 400 * (0 - 0)) / 3)