Event: Pre-season Games 24-5

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Opponent	Rating	Result
David E Shiers	1683	0 - 1
John F Harvey	0	1 - 0
Tom Moitié	1567	0 - 1

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

950 = (3250 + 400 * (1 - 2)) / 3)