Event: Rapidplay 2022-23 all-play-all

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Opponent	Rating	Result
Marian Trofin	1811	1 - 0
Marian Trofin	1811	0 - 1

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

1811 = (3622 + 400 * (1 - 1)) / 2)