Event: OTB "Friendly" Matches

Opponent Rating Result
Andrew Swales 1850 ½ - ½
Alex Collyer 1768 1 - 0
Pete Meadows 1781 1 - 0
Istvan Karacsony 1800 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2100 = (7199 + 400 * (3 - 0)) / 4)

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