Event: Kenneth Appleby (U1700)

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Opponent	Rating	Result
Chris Hare	0	1 - 0
Duncan Stables	1506	0 - 1
Stuart Fortey	0	0 - 1
Kaamil Bhatti	0	1 - 0
Stephen Burton	1495	1 - 0

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

680 = (3001 + 400 * (3 - 2)) / 5)