Event: West of England Counties Online Championship

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Opponent	Rating	Result
Chris TJ McKinley	1824	0 - 1
Thomas G Thorpe	2085	0 - 1
Chris JP Leeson	1752	1 - 0
Robert M Ashworth	1871	0 - 1

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

1683 = (7532 + 400 * (1 - 3)) / 4)