Event: Peter Harrison Knockout Cup

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Opponent	Rating	Result
Magdi Idris	153	½ - ½
Steve J Dyer	138	1 - 0
Robert Ashworth	150	0 - 1

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

147 = (441 + 400 * (1 - 1)) / 3)