Event: Division 1

Opponent Rating Result
Stephen Coughlan 2018 ½ - ½
Paul H Kenning 1856 1 - 0
Russell P White 2157 ½ - ½
Edgar Wilson 1999 1 - 0
Ruqayyah Rida 1958 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2158 = (9988 + 400 * (2 - 0)) / 5)

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