Event: Croydon Shield

Opponent Rating Result
Brendan Keenan 1960 0 - 1
David A Varley 1783 1 - 0
Sarunas Marciuska 1811 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1985 = (5554 + 400 * (2 - 1)) / 3)

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