Event: Croydon Shield

Opponent Rating Result
Jude Ranga Samarasinghe 2065 ½ - ½
Jude Ranga Samarasinghe 2065 1 - 0
Robin W Haldane 2148 0 - 1
Graham DJ Keane 2193 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2218 = (8471 + 400 * (2 - 1)) / 4)

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