Event: Preston Club Championship

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Opponent	Rating	Result
Carl A Tillotson	159	½ - ½
Alan Pidcock	136	0 - 1
Peter E Jowett	187	0 - 1
William J Moffatt	122

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

-106 = (482 + 400 * (0 - 2)) / 3)