Event: Division A

Opponent Rating Result
Paul A Evans 2052 0 - 1
Graham J Ashcroft 1890 0 - 1
Om Reddy Jayar 1791 1 - 0
Peter Thompson 1848 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1795 = (7581 + 400 * (1 - 2)) / 4)

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