Event: Book Prize - Premier 23/24

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Opponent	Rating	Result
Sam J Murphy	1530	½ - ½
Robert Sims	1497	1 - 0
Peter J Eales	1601	1 - 0

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

1809 = (4628 + 400 * (2 - 0)) / 3)