Event: Eastman Cup

Opponent Rating Result
Graham DJ Keane 2179 0 - 1
James AB Stevenson 2110 0 - 1
Adam Cranston 1783 ½ - ½
Graham P Alcock 1825 0 - 1
Claudio Moni 1735 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1686 = (9632 + 400 * (0 - 3)) / 5)

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