Event: Division 4

Opponent Rating Result
Peter J Windows 129 ½ - ½
David S Johnson 121 1 - 0
Roger J Edwards 123 ½ - ½
Simon Layhe 134 1 - 0
Julian N Hawthorne 128 ½ - ½
Peter J Windows 129 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

261 = (764 + 400 * (2 - 0)) / 6)

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