Event: Division 2

Opponent Rating Result
Hooman Honarvarmahalati 1832 ½ - ½
Luke Chapman 1920 ½ - ½
Paul R Selby 1759 1 - 0
Stephen D Blewitt 1768 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2020 = (7279 + 400 * (2 - 0)) / 4)

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