Event: Rapidplay 2022-23 all-play-all

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Opponent	Rating	Result
Chris W Heath	1764	0 - 1
Chris W Heath	1764	1 - 0
Daniel Miller	1573	1 - 0
Daniel Miller	1573	0 - 1

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

1669 = (6674 + 400 * (2 - 2)) / 4)