Event: West of England Counties Online Championship

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Opponent	Rating	Result
Ainsley Killey	1601	1 - 0
Nigel J Kirkman	1722	0 - 1
Peter D Dimond	1200	0 - 1

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

1374 = (4523 + 400 * (1 - 2)) / 3)