Event: Derby & District Division 1

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Opponent	Rating	Result
John M Potter	2153	0 - 1
Frank Richmond	1922	½ - ½
Peter Ackley	2030	½ - ½
John M Potter	2153	0 - 1
Andrew Stevens	1951	½ - ½
Andy Townsend	1892	1 - 0
John Molyneux	2136	0 - 1

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

1920 = (14237 + 400 * (1 - 3)) / 7)