Event: Graded friendlies - rapidplay

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Opponent	Rating	Result
Paul Smith	1827	1 - 0
Paul Smith	1827	½ - ½
Paul Smith	1827	0 - 1

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

1827 = (5481 + 400 * (1 - 1)) / 3)