Event: Durham City Club Tournament

Opponent Rating Result
Ken P Neat 2169 ½ - ½
Geoff Raw 1351 1 - 0
Mahmoud Shahbazi 2041 ½ - ½
Andy Proudfoot 1547 ½ - ½
Vaughan Davison 1585 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1819 = (8693 + 400 * (1 - 0)) / 5)

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