Event: Book Prize - Premier 23/24

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Opponent	Rating	Result
Andrew N Mills	1637	½ - ½
Iwan Cave	2168	0 - 1
Graham Stuart	1763	1 - 0

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

1856 = (5568 + 400 * (1 - 1)) / 3)