Event: Book Prize - Premier 23/24

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Opponent	Rating	Result
Iwan Cave	2168	0 - 1
Graham Stuart	1763	0 - 1
P Przybycin	1644	0 - 1

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

1458 = (5575 + 400 * (0 - 3)) / 3)