Event: Essex OL Open Championship

Opponent Rating Result
Ian D Hunnable 1936 1 - 0
Robin Slade 1996 1 - 0
David A Sands 2265 0 - 1
Harry Z Zheng 1914 1 - 0
Julian Corfield 1936 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2169 = (10047 + 400 * (3 - 1)) / 5)

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