Event: Division A

Opponent Rating Result
Peter E Jowett 2200 ½ - ½
John G Cooper 1945 1 - 0
Martyn Hamer 2125 1 - 0
Martyn Hamer 2125 ½ - ½
Peter E Jowett 2200 1 - 0
Samuel A Walker 2155 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2325 = (12750 + 400 * (3 - 0)) / 6)

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