Event: Division 1

Opponent Rating Result
Adrian O Pickersgill 1919 ½ - ½
Peter G Farr 2128 1 - 0
Maks Rozman 2165 ½ - ½
David B Graham 2236 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2212 = (8448 + 400 * (1 - 0)) / 4)

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