Event: Derby & District Division 1

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Opponent	Rating	Result
John C Tompson	2070	0 - 1
Andrew Stevens	1951	1 - 0
Luke S Alldread	1849	½ - ½

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

1957 = (5870 + 400 * (1 - 1)) / 3)