Event: Derby & District Division 1

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Opponent	Rating	Result
Anthony L Natt	1896	0 - 1
Steve P Retout	2021	0 - 1
John M Potter	2153	0 - 1

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

1623 = (6070 + 400 * (0 - 3)) / 3)