Event: Division A

Opponent Rating Result
Peter E Jowett 2200 ½ - ½
Paul A Evans 2080 1 - 0
Peter E Jowett 2200 ½ - ½
Martin Mitchell 2268 0 - 1
Martin Mitchell 2268 ½ - ½
David E Aspinall 1773 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2132 = (12789 + 400 * (1 - 1)) / 6)

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