Event: 5th Somerset New Year Major

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Opponent	Rating	Result
Rob McClatchey	0	½ - ½
Richard J Johnson	0	1 - 0
Daniel Shek	1951	½ - ½
Matthew Timbrell	1632	½ - ½
Peter Jones	0	1 - 0

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

877 = (3583 + 400 * (2 - 0)) / 5)