Event: Division One

Opponent Rating Result
Ian Emery 1911 1 - 0
Elis D Dicen 2187 ½ - ½
Neil Clarke 1946 1 - 0
Anthony J Green 1887 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2183 = (7931 + 400 * (2 - 0)) / 4)

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