Event: Div 4 - Athenaeum Cup

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Opponent	Rating	Result
Sarah L White	0	1 - 0
Peter T Sharpe	1664	0 - 1
Ben G Hunt	1673	0 - 1

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

979 = (3337 + 400 * (1 - 2)) / 3)