Event: Summer Open Division

Opponent Rating Result
David R Thomas 172 1 - 0
Simon A Killarney 122 1 - 0
John Lee 120 1 - 0
Simon C Smith 160 ½ - ½
Ann-Marie James 184 ½ - ½
Simon A Killarney 122 1 - 0
John Lee 120 1 - 0
Simon C Smith 160 1 - 0
Jonathan Dale 154 0 - 1
Ann-Marie James 184 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

390 = (1498 + 400 * (7 - 1)) / 10)

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