Event: Lytham Summer Tournament

Opponent Rating Result
Rob Gallagher 158 1 - 0
Darren Pickering 0 ½ - ½
John G Cooper 170 1 - 0
David E Aspinall 140 0 - 1
Robert Tinton 123 1 - 0
Colin Wilks 113 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

317 = (704 + 400 * (4 - 1)) / 6)

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