Event: Eastman Cup

Opponent Rating Result
Laurie Mackellar 1700 1 - 0
Andrew M Stone 2155 0 - 1
Robert J Stebbings 1629 0 - 1
Antanas Zapolskis 2314 0 - 1
Thomas O'Brien 1400 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1760 = (9198 + 400 * (2 - 3)) / 5)

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