Event: SCCU County Championship: u1850

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Opponent	Rating	Result
Rob Woolacott	1713	0 - 1
Alexey Markov	1709	½ - ½
Martin E Newman	1658	0 - 1
Rafael Couto Cabral	1735	1 - 0
Alan E Riddoch	1759	0 - 1
Peter J Horlock	1702	1 - 0

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

1646 = (10276 + 400 * (2 - 3)) / 6)