Event: Division One

Opponent Rating Result
John N McDonald 1880 1 - 0
Andrew J Eagle 1820 1 - 0
Tom Revans 0 ½ - ½
Alastair Mitchell-Baker 1860 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1490 = (5560 + 400 * (2 - 1)) / 4)

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