Event: William Jeffrey Cup - Margate 30

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Opponent	Rating	Result
Roy J McAloney	1421	0 - 1
John L Clarke	1423	1 - 0
Colin G Gregory	1416	0 - 1
Keith C Findley	1765	0 - 1
John L Clarke	1374	1 - 0
Roy J McAloney	1488	1 - 0
James Cole	1553	0 - 1
James Cole	1553	0 - 1
Keith C Findley	1747	0 - 1

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

1393 = (13740 + 400 * (3 - 6)) / 9)